CVE-2024-36971 (GCVE-0-2024-36971)
Vulnerability from cvelistv5
Published
2024-06-10 09:03
Modified
2026-05-11 20:18
Summary
In the Linux kernel, the following vulnerability has been resolved: net: fix __dst_negative_advice() race __dst_negative_advice() does not enforce proper RCU rules when sk->dst_cache must be cleared, leading to possible UAF. RCU rules are that we must first clear sk->sk_dst_cache, then call dst_release(old_dst). Note that sk_dst_reset(sk) is implementing this protocol correctly, while __dst_negative_advice() uses the wrong order. Given that ip6_negative_advice() has special logic against RTF_CACHE, this means each of the three ->negative_advice() existing methods must perform the sk_dst_reset() themselves. Note the check against NULL dst is centralized in __dst_negative_advice(), there is no need to duplicate it in various callbacks. Many thanks to Clement Lecigne for tracking this issue. This old bug became visible after the blamed commit, using UDP sockets.
Impacted products
Vendor Product Version
Linux Linux Version: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314
Version: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314
Version: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314
Version: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314
Version: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314
Version: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314
Version: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314
Version: a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314
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CISA Known Exploited Vulnerability
Data from the CISA Known Exploited Vulnerabilities Catalog

Date added: 2024-08-07

Due date: 2024-08-28

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Used in ransomware: Unknown

Notes: This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://source.android.com/docs/security/bulletin/2024-08-01, https://lore.kernel.org/linux-cve-announce/20240610090330.1347021-2-lee@kernel.org/T/#u ; https://nvd.nist.gov/vuln/detail/CVE-2024-36971

Show details on NVD website


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        "timeline": [
          {
            "lang": "en",
            "time": "2024-08-07T00:00:00.000Z",
            "value": "CVE-2024-36971 added to CISA KEV"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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        {
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          "product": "Linux",
          "programFiles": [
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            "net/ipv6/route.c",
            "net/xfrm/xfrm_policy.c"
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              "status": "affected",
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            },
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              "status": "affected",
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            }
          ]
        },
        {
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          "product": "Linux",
          "programFiles": [
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            "include/net/sock.h",
            "net/ipv4/route.c",
            "net/ipv6/route.c",
            "net/xfrm/xfrm_policy.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.6"
            },
            {
              "lessThan": "4.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.316",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.278",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.219",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.161",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.94",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.9.*",
              "status": "unaffected",
              "version": "6.9.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.10",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.316",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.278",
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                  "vulnerable": true
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                  "vulnerable": true
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                }
              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix __dst_negative_advice() race\n\n__dst_negative_advice() does not enforce proper RCU rules when\nsk-\u003edst_cache must be cleared, leading to possible UAF.\n\nRCU rules are that we must first clear sk-\u003esk_dst_cache,\nthen call dst_release(old_dst).\n\nNote that sk_dst_reset(sk) is implementing this protocol correctly,\nwhile __dst_negative_advice() uses the wrong order.\n\nGiven that ip6_negative_advice() has special logic\nagainst RTF_CACHE, this means each of the three -\u003enegative_advice()\nexisting methods must perform the sk_dst_reset() themselves.\n\nNote the check against NULL dst is centralized in\n__dst_negative_advice(), there is no need to duplicate\nit in various callbacks.\n\nMany thanks to Clement Lecigne for tracking this issue.\n\nThis old bug became visible after the blamed commit, using UDP sockets."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T20:18:09.088Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/051c0bde9f0450a2ec3d62a86d2a0d2fad117f13"
        },
        {
          "url": "https://git.kernel.org/stable/c/db0082825037794c5dba9959c9de13ca34cc5e72"
        },
        {
          "url": "https://git.kernel.org/stable/c/2295a7ef5c8c49241bff769e7826ef2582e532a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/eacb8b195579c174a6d3e12a9690b206eb7f28cf"
        },
        {
          "url": "https://git.kernel.org/stable/c/81dd3c82a456b0015461754be7cb2693991421b4"
        },
        {
          "url": "https://git.kernel.org/stable/c/5af198c387128a9d2ddd620b0f0803564a4d4508"
        },
        {
          "url": "https://git.kernel.org/stable/c/b8af8e6118a6605f0e495a58d591ca94a85a50fc"
        },
        {
          "url": "https://git.kernel.org/stable/c/92f1655aa2b2294d0b49925f3b875a634bd3b59e"
        }
      ],
      "title": "net: fix __dst_negative_advice() race",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-36971",
    "datePublished": "2024-06-10T09:03:23.878Z",
    "dateReserved": "2024-05-30T15:25:07.082Z",
    "dateUpdated": "2026-05-11T20:18:09.088Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "cisa_known_exploited": {
      "cveID": "CVE-2024-36971",
      "cwes": "[\"CWE-416\"]",
      "dateAdded": "2024-08-07",
      "dueDate": "2024-08-28",
      "knownRansomwareCampaignUse": "Unknown",
      "notes": "This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see:   https://source.android.com/docs/security/bulletin/2024-08-01,  https://lore.kernel.org/linux-cve-announce/20240610090330.1347021-2-lee@kernel.org/T/#u ; https://nvd.nist.gov/vuln/detail/CVE-2024-36971",
      "product": "Kernel",
      "requiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
      "shortDescription": "Android contains an unspecified vulnerability in the kernel that allows for remote code execution. This vulnerability resides in Linux Kernel and could impact other products, including but not limited to Android OS.",
      "vendorProject": "Android",
      "vulnerabilityName": "Android Kernel Remote Code Execution Vulnerability"
    }
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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