CVE-2025-21676 (GCVE-0-2025-21676)
Vulnerability from cvelistv5
Published
2025-01-31 11:25
Modified
2026-08-05 11:53
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: fec: handle page_pool_dev_alloc_pages error The fec_enet_update_cbd function calls page_pool_dev_alloc_pages but did not handle the case when it returned NULL. There was a WARN_ON(!new_page) but it would still proceed to use the NULL pointer and then crash. This case does seem somewhat rare but when the system is under memory pressure it can happen. One case where I can duplicate this with some frequency is when writing over a smbd share to a SATA HDD attached to an imx6q. Setting /proc/sys/vm/min_free_kbytes to higher values also seems to solve the problem for my test case. But it still seems wrong that the fec driver ignores the memory allocation error and can crash. This commit handles the allocation error by dropping the current packet.
References
Impacted products
Vendor Product Version
Linux Linux Version: 95698ff6177b5f1f13f251da60e7348413046ae4
Version: 95698ff6177b5f1f13f251da60e7348413046ae4
Version: 95698ff6177b5f1f13f251da60e7348413046ae4
Version: 95698ff6177b5f1f13f251da60e7348413046ae4
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-21676",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:51:57.870830Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T19:57:11.595Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "V3.1.6",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "V3.1.5",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "V3.1.6",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "V3.1.5",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "V3.1.6",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "V3.1.5",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "V3.1.6",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "V3.1.5",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
            "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "V3.1.6",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
            "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "V3.1.5",
                "versionType": "custom"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-14T12:39:39.886Z",
          "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
          "shortName": "siemens-SADP"
        },
        "references": [
          {
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
          },
          {
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
          }
        ],
        "x_adpType": "supplier"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/freescale/fec_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "eacdcc14f3c8d4c1447565521e792ddb3a67e08d",
              "status": "affected",
              "version": "95698ff6177b5f1f13f251da60e7348413046ae4",
              "versionType": "git"
            },
            {
              "lessThan": "8a0097db0544b658c159ac787319737712063a23",
              "status": "affected",
              "version": "95698ff6177b5f1f13f251da60e7348413046ae4",
              "versionType": "git"
            },
            {
              "lessThan": "1425cb829556398f594658512d49292f988a2ab0",
              "status": "affected",
              "version": "95698ff6177b5f1f13f251da60e7348413046ae4",
              "versionType": "git"
            },
            {
              "lessThan": "001ba0902046cb6c352494df610718c0763e77a5",
              "status": "affected",
              "version": "95698ff6177b5f1f13f251da60e7348413046ae4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/freescale/fec_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.1"
            },
            {
              "lessThan": "6.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.167",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.74",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.167",
                  "versionStartIncluding": "6.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.74",
                  "versionStartIncluding": "6.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.11",
                  "versionStartIncluding": "6.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13",
                  "versionStartIncluding": "6.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fec: handle page_pool_dev_alloc_pages error\n\nThe fec_enet_update_cbd function calls page_pool_dev_alloc_pages but did\nnot handle the case when it returned NULL. There was a WARN_ON(!new_page)\nbut it would still proceed to use the NULL pointer and then crash.\n\nThis case does seem somewhat rare but when the system is under memory\npressure it can happen. One case where I can duplicate this with some\nfrequency is when writing over a smbd share to a SATA HDD attached to an\nimx6q.\n\nSetting /proc/sys/vm/min_free_kbytes to higher values also seems to solve\nthe problem for my test case. But it still seems wrong that the fec driver\nignores the memory allocation error and can crash.\n\nThis commit handles the allocation error by dropping the current packet."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The vulnerable code is the FEC Ethernet driver\u0027s NAPI receive path, reached solely by frames arriving on the wire, and the maintainer\u0027s reproducer is ordinary routed network traffic (SMB writes) to the device. No local access is needed \u2014 a remote attacker\u0027s packets both create the memory pressure and drive the RX descriptor refill that dereferences NULL.\nAC:L - The attacker controls the triggering condition by controlling traffic volume: sustained flooding of a memory-constrained embedded target reliably drives page_pool allocation failures, and the fix\u0027s author reproduced the crash \"with some frequency\" using nothing but heavy network I/O. No specific memory layout or victim state outside the attacker\u0027s influence is required.\nPR:N - There is no authentication, capability check, or credential gate anywhere between frame arrival and fec_enet_update_cbd() \u2014 packet reception happens in softirq before any socket-level authorization. Unauthenticated flood traffic suffices to both induce memory pressure and supply the receive frames.\nUI:N - The RX path runs autonomously in NAPI/softirq context whenever frames arrive; no local user has to open a file, mount anything, or take any action for the dereference to occur.\nS:U - The fault and its consequences are confined to the kernel\u0027s own security authority on the affected host; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:N - The faulting access is a read of an unmapped low address (offsetof(struct net_iov, dma_addr) off a NULL netmem), which aborts immediately rather than returning data. No kernel memory contents, pointers, or freed-object data are disclosed to the attacker.\nI:N - There is no out-of-bounds or attacker-controlled write \u2014 the NULL store into rx_skb_info[] is a driver-internal field and execution aborts at the subsequent load before the bogus DMA address can be committed to hardware. No control-flow hijack or data modification primitive results.\nA:H - The NULL pointer dereference occurs in softirq/NAPI context, producing a fatal exception in interrupt context \u2014 a kernel panic (or an immediate panic via the preceding WARN_ON under panic_on_warn), taking down the entire device. It can be re-triggered at will by resuming the traffic load after reboot."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:53:32.256Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/eacdcc14f3c8d4c1447565521e792ddb3a67e08d"
        },
        {
          "url": "https://git.kernel.org/stable/c/8a0097db0544b658c159ac787319737712063a23"
        },
        {
          "url": "https://git.kernel.org/stable/c/1425cb829556398f594658512d49292f988a2ab0"
        },
        {
          "url": "https://git.kernel.org/stable/c/001ba0902046cb6c352494df610718c0763e77a5"
        }
      ],
      "title": "net: fec: handle page_pool_dev_alloc_pages error",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21676",
    "datePublished": "2025-01-31T11:25:38.126Z",
    "dateReserved": "2024-12-29T08:45:45.737Z",
    "dateUpdated": "2026-08-05T11:53:32.256Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"affected\": [{\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\", \"versions\": [{\"status\": \"affected\", \"version\": \"V3.1.6\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\", \"versions\": [{\"status\": \"affected\", \"version\": \"V3.1.5\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\", \"versions\": [{\"status\": \"affected\", \"version\": \"V3.1.6\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\", \"versions\": [{\"status\": \"affected\", \"version\": \"V3.1.5\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\", \"versions\": [{\"status\": \"affected\", \"version\": \"V3.1.6\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\", \"versions\": [{\"status\": \"affected\", \"version\": \"V3.1.5\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\", \"versions\": [{\"status\": \"affected\", \"version\": \"V3.1.6\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\", \"versions\": [{\"status\": \"affected\", \"version\": \"V3.1.5\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"vendor\": \"Siemens\", \"product\": \"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP\", \"versions\": [{\"status\": \"affected\", \"version\": \"V3.1.6\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"vendor\": \"Siemens\", \"product\": \"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP\", \"versions\": [{\"status\": \"affected\", \"version\": \"V3.1.5\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}], \"x_adpType\": \"supplier\", \"references\": [{\"url\": \"https://cert-portal.siemens.com/productcert/html/ssa-082556.html\"}, {\"url\": \"https://cert-portal.siemens.com/productcert/html/ssa-019113.html\"}], \"providerMetadata\": {\"orgId\": \"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\", \"shortName\": \"siemens-SADP\", \"dateUpdated\": \"2026-07-14T12:39:39.886Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-21676\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-01T19:51:57.870830Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"CWE-476 NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-01T15:59:02.538Z\"}}], \"cna\": {\"title\": \"net: fec: handle page_pool_dev_alloc_pages error\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:N - The vulnerable code is the FEC Ethernet driver\u0027s NAPI receive path, reached solely by frames arriving on the wire, and the maintainer\u0027s reproducer is ordinary routed network traffic (SMB writes) to the device. No local access is needed \\u2014 a remote attacker\u0027s packets both create the memory pressure and drive the RX descriptor refill that dereferences NULL.\\nAC:L - The attacker controls the triggering condition by controlling traffic volume: sustained flooding of a memory-constrained embedded target reliably drives page_pool allocation failures, and the fix\u0027s author reproduced the crash \\\"with some frequency\\\" using nothing but heavy network I/O. No specific memory layout or victim state outside the attacker\u0027s influence is required.\\nPR:N - There is no authentication, capability check, or credential gate anywhere between frame arrival and fec_enet_update_cbd() \\u2014 packet reception happens in softirq before any socket-level authorization. Unauthenticated flood traffic suffices to both induce memory pressure and supply the receive frames.\\nUI:N - The RX path runs autonomously in NAPI/softirq context whenever frames arrive; no local user has to open a file, mount anything, or take any action for the dereference to occur.\\nS:U - The fault and its consequences are confined to the kernel\u0027s own security authority on the affected host; no hypervisor, IOMMU, or sandbox boundary is crossed.\\nC:N - The faulting access is a read of an unmapped low address (offsetof(struct net_iov, dma_addr) off a NULL netmem), which aborts immediately rather than returning data. No kernel memory contents, pointers, or freed-object data are disclosed to the attacker.\\nI:N - There is no out-of-bounds or attacker-controlled write \\u2014 the NULL store into rx_skb_info[] is a driver-internal field and execution aborts at the subsequent load before the bogus DMA address can be committed to hardware. No control-flow hijack or data modification primitive results.\\nA:H - The NULL pointer dereference occurs in softirq/NAPI context, producing a fatal exception in interrupt context \\u2014 a kernel panic (or an immediate panic via the preceding WARN_ON under panic_on_warn), taking down the entire device. It can be re-triggered at will by resuming the traffic load after reboot.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"95698ff6177b5f1f13f251da60e7348413046ae4\", \"lessThan\": \"eacdcc14f3c8d4c1447565521e792ddb3a67e08d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"95698ff6177b5f1f13f251da60e7348413046ae4\", \"lessThan\": \"8a0097db0544b658c159ac787319737712063a23\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"95698ff6177b5f1f13f251da60e7348413046ae4\", \"lessThan\": \"1425cb829556398f594658512d49292f988a2ab0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"95698ff6177b5f1f13f251da60e7348413046ae4\", \"lessThan\": \"001ba0902046cb6c352494df610718c0763e77a5\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/ethernet/freescale/fec_main.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.1\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.1\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.167\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.74\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.11\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/ethernet/freescale/fec_main.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/eacdcc14f3c8d4c1447565521e792ddb3a67e08d\"}, {\"url\": \"https://git.kernel.org/stable/c/8a0097db0544b658c159ac787319737712063a23\"}, {\"url\": \"https://git.kernel.org/stable/c/1425cb829556398f594658512d49292f988a2ab0\"}, {\"url\": \"https://git.kernel.org/stable/c/001ba0902046cb6c352494df610718c0763e77a5\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: fec: handle page_pool_dev_alloc_pages error\\n\\nThe fec_enet_update_cbd function calls page_pool_dev_alloc_pages but did\\nnot handle the case when it returned NULL. There was a WARN_ON(!new_page)\\nbut it would still proceed to use the NULL pointer and then crash.\\n\\nThis case does seem somewhat rare but when the system is under memory\\npressure it can happen. One case where I can duplicate this with some\\nfrequency is when writing over a smbd share to a SATA HDD attached to an\\nimx6q.\\n\\nSetting /proc/sys/vm/min_free_kbytes to higher values also seems to solve\\nthe problem for my test case. But it still seems wrong that the fec driver\\nignores the memory allocation error and can crash.\\n\\nThis commit handles the allocation error by dropping the current packet.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.167\", \"versionStartIncluding\": \"6.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.74\", \"versionStartIncluding\": \"6.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.11\", \"versionStartIncluding\": \"6.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13\", \"versionStartIncluding\": \"6.1\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T11:53:32.256Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-21676\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T11:53:32.256Z\", \"dateReserved\": \"2024-12-29T08:45:45.737Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-01-31T11:25:38.126Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.