CVE-2026-98196 (GCVE-0-2026-98196)
Vulnerability from cvelistv5
Published
2026-10-06 08:44
Modified
2026-10-19 09:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmsmac: fix UAF in brcms_free_timer() brcms_free_timer() calls brcms_del_timer() which uses the non-synchronous cancel_delayed_work() to cancel the timer's underlying delayed work. If the work callback (_brcms_timer) is already running, cancel_delayed_work() returns false without waiting, and brcms_free_timer() proceeds to kfree(t) while the callback still accesses t through container_of(). Add an explicit cancel_delayed_work_sync() after brcms_del_timer() to guarantee that any in-flight callback has completed before the timer structure is freed.
References
Impacted products
Vendor Product Version
Linux Linux Version: 5b435de0d786869c95d1962121af0d7df2542009
Version: 5b435de0d786869c95d1962121af0d7df2542009
Version: 5b435de0d786869c95d1962121af0d7df2542009
Version: 5b435de0d786869c95d1962121af0d7df2542009
Version: 5b435de0d786869c95d1962121af0d7df2542009
Version: 5b435de0d786869c95d1962121af0d7df2542009
Version: 5b435de0d786869c95d1962121af0d7df2542009
Version: 5b435de0d786869c95d1962121af0d7df2542009
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/broadcom/brcm80211/brcmsmac/mac80211_if.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "10eeb0b29fd7f52487c9ae573e8d79c210a0095d",
              "status": "affected",
              "version": "5b435de0d786869c95d1962121af0d7df2542009",
              "versionType": "git"
            },
            {
              "lessThan": "74acccc928851f69184271832d690607877122af",
              "status": "affected",
              "version": "5b435de0d786869c95d1962121af0d7df2542009",
              "versionType": "git"
            },
            {
              "lessThan": "050d2486e8ed2c0a23b87249ccd23e8072721391",
              "status": "affected",
              "version": "5b435de0d786869c95d1962121af0d7df2542009",
              "versionType": "git"
            },
            {
              "lessThan": "856dabd5f2617efb23c043be9e1b22a9e6e97c41",
              "status": "affected",
              "version": "5b435de0d786869c95d1962121af0d7df2542009",
              "versionType": "git"
            },
            {
              "lessThan": "2a4841ff0b74b495cddd31ae324e922217fc2f13",
              "status": "affected",
              "version": "5b435de0d786869c95d1962121af0d7df2542009",
              "versionType": "git"
            },
            {
              "lessThan": "1edb3ddd261e973a4d577c0547e63bfa25a8170d",
              "status": "affected",
              "version": "5b435de0d786869c95d1962121af0d7df2542009",
              "versionType": "git"
            },
            {
              "lessThan": "777cb6bba59e875b16a1d8897a483a5fecfcd5d2",
              "status": "affected",
              "version": "5b435de0d786869c95d1962121af0d7df2542009",
              "versionType": "git"
            },
            {
              "lessThan": "1eeca1d5e0920fbdad6449768fd2d4364e714180",
              "status": "affected",
              "version": "5b435de0d786869c95d1962121af0d7df2542009",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/broadcom/brcm80211/brcmsmac/mac80211_if.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.2"
            },
            {
              "lessThan": "3.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.271",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.222",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.189",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.112",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.54",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.8",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmsmac: fix UAF in brcms_free_timer()\n\nbrcms_free_timer() calls brcms_del_timer() which uses the non-synchronous\ncancel_delayed_work() to cancel the timer\u0027s underlying delayed work.  If\nthe work callback (_brcms_timer) is already running, cancel_delayed_work()\nreturns false without waiting, and brcms_free_timer() proceeds to kfree(t)\nwhile the callback still accesses t through container_of().\n\nAdd an explicit cancel_delayed_work_sync() after brcms_del_timer() to\nguarantee that any in-flight callback has completed before the timer\nstructure is freed."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:15:27.411Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/10eeb0b29fd7f52487c9ae573e8d79c210a0095d"
        },
        {
          "url": "https://git.kernel.org/stable/c/74acccc928851f69184271832d690607877122af"
        },
        {
          "url": "https://git.kernel.org/stable/c/050d2486e8ed2c0a23b87249ccd23e8072721391"
        },
        {
          "url": "https://git.kernel.org/stable/c/856dabd5f2617efb23c043be9e1b22a9e6e97c41"
        },
        {
          "url": "https://git.kernel.org/stable/c/2a4841ff0b74b495cddd31ae324e922217fc2f13"
        },
        {
          "url": "https://git.kernel.org/stable/c/1edb3ddd261e973a4d577c0547e63bfa25a8170d"
        },
        {
          "url": "https://git.kernel.org/stable/c/777cb6bba59e875b16a1d8897a483a5fecfcd5d2"
        },
        {
          "url": "https://git.kernel.org/stable/c/1eeca1d5e0920fbdad6449768fd2d4364e714180"
        }
      ],
      "title": "wifi: brcmsmac: fix UAF in brcms_free_timer()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98196",
    "datePublished": "2026-10-06T08:44:35.616Z",
    "dateReserved": "2026-09-25T10:25:14.324Z",
    "dateUpdated": "2026-10-19T09:15:27.411Z",
    "state": "PUBLISHED"
  },
  "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.