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CVE-2026-23437 net: shaper: protect late read accesses to the hierarchy

🗓️ 03 Apr 2026 15:15:22Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 20 Views

Fix late reads of the net hierarchy in the kernel shaper by adding a liveness check when converting netdev ref to locked.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/shaper/shaper.c"
    ],
    "versions": [
      {
        "version": "4b623f9f0f59652ea71fcb27d60b4c3b65126dbb",
        "lessThan": "581eee0890a8bde44f1fb78ad3e70502a897d583",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4b623f9f0f59652ea71fcb27d60b4c3b65126dbb",
        "lessThan": "348758ba74e6a348299965b16a97cfb817545cc0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4b623f9f0f59652ea71fcb27d60b4c3b65126dbb",
        "lessThan": "0f9ea7141f365b4f27226898e62220fb98ef8dc6",
        "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/shaper/shaper.c"
    ],
    "versions": [
      {
        "version": "6.13",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.13",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.20",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.19.10",
        "lessThanOrEqual": "6.19.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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