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CVE-2026-31474 can: isotp: fix tx.buf use-after-free in isotp_sendmsg()

🗓️ 22 Apr 2026 13:54:03Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 33 Views

CVE-2026-31474 fixes isotp use-after-free by delaying tx buffer free to sk_destruct.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/can/isotp.c"
    ],
    "versions": [
      {
        "version": "96d1c81e6a0478535342dff6c730adb076cd84e8",
        "lessThan": "cb3d6efa78460e6d50bf68806d0db66265709f64",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "96d1c81e6a0478535342dff6c730adb076cd84e8",
        "lessThan": "9649d051e54413049c009638ec1dc23962c884a4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "96d1c81e6a0478535342dff6c730adb076cd84e8",
        "lessThan": "eec8a1b18a79600bd4419079dc0026c1db72a830",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "96d1c81e6a0478535342dff6c730adb076cd84e8",
        "lessThan": "2e62e7051eca75a7f2e3d52d62ec10d7d7aa358c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "96d1c81e6a0478535342dff6c730adb076cd84e8",
        "lessThan": "424e95d62110cdbc8fd12b40918f37e408e35a92",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/can/isotp.c"
    ],
    "versions": [
      {
        "version": "6.4",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.4",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.131",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.80",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.21",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.19.11",
        "lessThanOrEqual": "6.19.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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