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CVE-2026-31580 bcache: fix cached_dev.sb_bio use-after-free and crash

🗓️ 24 Apr 2026 14:42:10Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 30 Views

bcache fix cached_dev.sb_bio use-after-free by waiting for superblock write to finish on free.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/md/bcache/super.c"
    ],
    "versions": [
      {
        "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
        "lessThan": "81f44ed8c3f54abb7561ece774ea4cca5070b2f2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
        "lessThan": "f50e7c325ab1207fe941555bcff659f6d7050572",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
        "lessThan": "9467d360be70e6ee55b0c1cd2a1f1424f57b5b85",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
        "lessThan": "47fa09fe7f3e09df28a51cb2cbd8f5d2f7f6edc1",
        "status": "affected",
        "versionType": "git"
      },
      {
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        "lessThan": "add4982510f3b7c318a2dd7438bdc9c63171e753",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
        "lessThan": "2d6965581e164fa2ba3f7652ddae5535f6336576",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
        "lessThan": "4f71c8ba2dc009042493021d94a9718fbe2ebf27",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
        "lessThan": "383f7fec0de8cee1cf7ae1f9d9f14044a61f10f9",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060",
        "lessThan": "fec114a98b8735ee89c75216c45a78e28be0f128",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/md/bcache/super.c"
    ],
    "versions": [
      {
        "version": "3.10",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.10",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.258",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.209",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.175",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.136",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.83",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.24",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.19.14",
        "lessThanOrEqual": "6.19.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0.1",
        "lessThanOrEqual": "7.0.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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