CVE-2026-31548 (GCVE-0-2026-31548)
Vulnerability from cvelistv5
Published
2026-04-24 14:33
Modified
2026-10-19 18:55
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: cancel pmsr_free_wk in cfg80211_pmsr_wdev_down When the nl80211 socket that originated a PMSR request is closed, cfg80211_release_pmsr() sets the request's nl_portid to zero and schedules pmsr_free_wk to process the abort asynchronously. If the interface is concurrently torn down before that work runs, cfg80211_pmsr_wdev_down() calls cfg80211_pmsr_process_abort() directly. However, the already- scheduled pmsr_free_wk work item remains pending and may run after the interface has been removed from the driver. This could cause the driver's abort_pmsr callback to operate on a torn-down interface, leading to undefined behavior and potential crashes. Cancel pmsr_free_wk synchronously in cfg80211_pmsr_wdev_down() before calling cfg80211_pmsr_process_abort(). This ensures any pending or in-progress work is drained before interface teardown proceeds, preventing the work from invoking the driver abort callback after the interface is gone.
References
Impacted products
Vendor Product Version
Linux Linux Version: 9bb7e0f24e7e7d00daa1219b14539e2e602649b2
Version: 9bb7e0f24e7e7d00daa1219b14539e2e602649b2
Version: 9bb7e0f24e7e7d00daa1219b14539e2e602649b2
Version: 9bb7e0f24e7e7d00daa1219b14539e2e602649b2
Version: 9bb7e0f24e7e7d00daa1219b14539e2e602649b2
Version: 9bb7e0f24e7e7d00daa1219b14539e2e602649b2
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-31548",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-16T15:10:48.891822Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-362",
                "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-19T18:55:58.636Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/wireless/pmsr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "28d3551f8d8cb3aec7497894d94150fe84d20e5e",
              "status": "affected",
              "version": "9bb7e0f24e7e7d00daa1219b14539e2e602649b2",
              "versionType": "git"
            },
            {
              "lessThan": "37e776e2e0a523731e2470dce6d563f0e8632a40",
              "status": "affected",
              "version": "9bb7e0f24e7e7d00daa1219b14539e2e602649b2",
              "versionType": "git"
            },
            {
              "lessThan": "d32c07ef1880fe20cf4ab223dbfedc9c0b2816aa",
              "status": "affected",
              "version": "9bb7e0f24e7e7d00daa1219b14539e2e602649b2",
              "versionType": "git"
            },
            {
              "lessThan": "a1b7a843f12a0c3e9d3a2ca607ce451916ef42cf",
              "status": "affected",
              "version": "9bb7e0f24e7e7d00daa1219b14539e2e602649b2",
              "versionType": "git"
            },
            {
              "lessThan": "72b7ea786b8e570ae11149e9089859a4a8634a13",
              "status": "affected",
              "version": "9bb7e0f24e7e7d00daa1219b14539e2e602649b2",
              "versionType": "git"
            },
            {
              "lessThan": "6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09",
              "status": "affected",
              "version": "9bb7e0f24e7e7d00daa1219b14539e2e602649b2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/wireless/pmsr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.0"
            },
            {
              "lessThan": "5.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.167",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.78",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.20",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.167",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.130",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.78",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.20",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.10",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: cancel pmsr_free_wk in cfg80211_pmsr_wdev_down\n\nWhen the nl80211 socket that originated a PMSR request is\nclosed, cfg80211_release_pmsr() sets the request\u0027s nl_portid\nto zero and schedules pmsr_free_wk to process the abort\nasynchronously. If the interface is concurrently torn down\nbefore that work runs, cfg80211_pmsr_wdev_down() calls\ncfg80211_pmsr_process_abort() directly. However, the already-\nscheduled pmsr_free_wk work item remains pending and may run\nafter the interface has been removed from the driver. This\ncould cause the driver\u0027s abort_pmsr callback to operate on a\ntorn-down interface, leading to undefined behavior and\npotential crashes.\n\nCancel pmsr_free_wk synchronously in cfg80211_pmsr_wdev_down()\nbefore calling cfg80211_pmsr_process_abort(). This ensures any\npending or in-progress work is drained before interface teardown\nproceeds, preventing the work from invoking the driver abort\ncallback after the interface is gone."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable path is reached through local nl80211 generic-netlink operations for `NL80211_CMD_PEER_MEASUREMENT_START` and netlink socket teardown/device teardown, not by remote WiFi frames alone.\nAC:L - The attacker can create the PMSR request, close the originating netlink socket to schedule `pmsr_free_wk`, and trigger interface teardown concurrently; this is an attacker-controlled race.\nPR:L - The start path is gated by `GENL_UNS_ADMIN_PERM`, requiring `CAP_NET_ADMIN` in the relevant network namespace. Under the kernel guidance, namespace-reachable `CAP_NET_ADMIN` is Low privileges rather than High.\nUI:N - No victim action is required once the attacker has local access and the needed netlink privilege; the attacker controls the request, socket close, and teardown sequence.\nS:U - The impact remains within the kernel/driver security authority and does not cross a VM, IOMMU, or separate sandbox boundary.\nC:H - The stale pending work can operate on a torn-down wireless interface and driver state, a use-after-teardown/use-after-free style condition. In the highest defensible case, freed or invalid kernel objects may be reused to gain memory disclosure primitives.\nI:H - The same stale work and driver callback path can dereference and act on invalid or reallocated kernel/driver objects. Treating this as exploitable memory corruption makes arbitrary write or control-flow impact defensible.\nA:H - The commit explicitly describes undefined behavior and potential crashes from invoking the abort callback after interface teardown. A kernel crash or oops is High availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:23:25.445Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/28d3551f8d8cb3aec7497894d94150fe84d20e5e"
        },
        {
          "url": "https://git.kernel.org/stable/c/37e776e2e0a523731e2470dce6d563f0e8632a40"
        },
        {
          "url": "https://git.kernel.org/stable/c/d32c07ef1880fe20cf4ab223dbfedc9c0b2816aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/a1b7a843f12a0c3e9d3a2ca607ce451916ef42cf"
        },
        {
          "url": "https://git.kernel.org/stable/c/72b7ea786b8e570ae11149e9089859a4a8634a13"
        },
        {
          "url": "https://git.kernel.org/stable/c/6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09"
        }
      ],
      "title": "wifi: cfg80211: cancel pmsr_free_wk in cfg80211_pmsr_wdev_down",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31548",
    "datePublished": "2026-04-24T14:33:16.021Z",
    "dateReserved": "2026-03-09T15:48:24.114Z",
    "dateUpdated": "2026-10-19T18:55:58.636Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-31548\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-16T15:10:48.891822Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-362\", \"description\": \"CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-16T15:10:49.471Z\"}}], \"cna\": {\"title\": \"wifi: cfg80211: cancel pmsr_free_wk in cfg80211_pmsr_wdev_down\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - The vulnerable path is reached through local nl80211 generic-netlink operations for `NL80211_CMD_PEER_MEASUREMENT_START` and netlink socket teardown/device teardown, not by remote WiFi frames alone.\\nAC:L - The attacker can create the PMSR request, close the originating netlink socket to schedule `pmsr_free_wk`, and trigger interface teardown concurrently; this is an attacker-controlled race.\\nPR:L - The start path is gated by `GENL_UNS_ADMIN_PERM`, requiring `CAP_NET_ADMIN` in the relevant network namespace. Under the kernel guidance, namespace-reachable `CAP_NET_ADMIN` is Low privileges rather than High.\\nUI:N - No victim action is required once the attacker has local access and the needed netlink privilege; the attacker controls the request, socket close, and teardown sequence.\\nS:U - The impact remains within the kernel/driver security authority and does not cross a VM, IOMMU, or separate sandbox boundary.\\nC:H - The stale pending work can operate on a torn-down wireless interface and driver state, a use-after-teardown/use-after-free style condition. In the highest defensible case, freed or invalid kernel objects may be reused to gain memory disclosure primitives.\\nI:H - The same stale work and driver callback path can dereference and act on invalid or reallocated kernel/driver objects. Treating this as exploitable memory corruption makes arbitrary write or control-flow impact defensible.\\nA:H - The commit explicitly describes undefined behavior and potential crashes from invoking the abort callback after interface teardown. A kernel crash or oops is High availability impact.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"9bb7e0f24e7e7d00daa1219b14539e2e602649b2\", \"lessThan\": \"28d3551f8d8cb3aec7497894d94150fe84d20e5e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9bb7e0f24e7e7d00daa1219b14539e2e602649b2\", \"lessThan\": \"37e776e2e0a523731e2470dce6d563f0e8632a40\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9bb7e0f24e7e7d00daa1219b14539e2e602649b2\", \"lessThan\": \"d32c07ef1880fe20cf4ab223dbfedc9c0b2816aa\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9bb7e0f24e7e7d00daa1219b14539e2e602649b2\", \"lessThan\": \"a1b7a843f12a0c3e9d3a2ca607ce451916ef42cf\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9bb7e0f24e7e7d00daa1219b14539e2e602649b2\", \"lessThan\": \"72b7ea786b8e570ae11149e9089859a4a8634a13\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9bb7e0f24e7e7d00daa1219b14539e2e602649b2\", \"lessThan\": \"6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09\", \"versionType\": \"git\"}], \"programFiles\": [\"net/wireless/pmsr.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.0\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.0\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.167\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.130\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.78\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.20\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"6.19.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.19.*\"}, {\"status\": \"unaffected\", \"version\": \"7.0\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/wireless/pmsr.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/28d3551f8d8cb3aec7497894d94150fe84d20e5e\"}, {\"url\": \"https://git.kernel.org/stable/c/37e776e2e0a523731e2470dce6d563f0e8632a40\"}, {\"url\": \"https://git.kernel.org/stable/c/d32c07ef1880fe20cf4ab223dbfedc9c0b2816aa\"}, {\"url\": \"https://git.kernel.org/stable/c/a1b7a843f12a0c3e9d3a2ca607ce451916ef42cf\"}, {\"url\": \"https://git.kernel.org/stable/c/72b7ea786b8e570ae11149e9089859a4a8634a13\"}, {\"url\": \"https://git.kernel.org/stable/c/6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwifi: cfg80211: cancel pmsr_free_wk in cfg80211_pmsr_wdev_down\\n\\nWhen the nl80211 socket that originated a PMSR request is\\nclosed, cfg80211_release_pmsr() sets the request\u0027s nl_portid\\nto zero and schedules pmsr_free_wk to process the abort\\nasynchronously. If the interface is concurrently torn down\\nbefore that work runs, cfg80211_pmsr_wdev_down() calls\\ncfg80211_pmsr_process_abort() directly. However, the already-\\nscheduled pmsr_free_wk work item remains pending and may run\\nafter the interface has been removed from the driver. This\\ncould cause the driver\u0027s abort_pmsr callback to operate on a\\ntorn-down interface, leading to undefined behavior and\\npotential crashes.\\n\\nCancel pmsr_free_wk synchronously in cfg80211_pmsr_wdev_down()\\nbefore calling cfg80211_pmsr_process_abort(). This ensures any\\npending or in-progress work is drained before interface teardown\\nproceeds, preventing the work from invoking the driver abort\\ncallback after the interface is gone.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.167\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.130\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.78\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.20\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.19.10\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.0\", \"versionStartIncluding\": \"5.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T12:23:25.445Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-31548\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-19T18:55:58.636Z\", \"dateReserved\": \"2026-03-09T15:48:24.114Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-04-24T14:33:16.021Z\", \"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.