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CVE-2026-23374 blktrace: fix __this_cpu_read/write in preemptible context

🗓️ 25 Mar 2026 10:27:55Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 19 Views

Fix blktrace to safely use __this_cpu_read/write in preemptible context by requiring preemption be disabled when accessing trace_cmdline_save.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/trace/blktrace.c"
    ],
    "versions": [
      {
        "version": "7ffbd48d5cab22bcd1120eb2349db1319e2d827a",
        "lessThan": "aaba6ee63ba65b026401c94e2dd16b9f6e895934",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7ffbd48d5cab22bcd1120eb2349db1319e2d827a",
        "lessThan": "e5584932ac1dacc182c430d09e2b5490d1d4372b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7ffbd48d5cab22bcd1120eb2349db1319e2d827a",
        "lessThan": "59efa088752b1c380a0475974679850cc8aef907",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7ffbd48d5cab22bcd1120eb2349db1319e2d827a",
        "lessThan": "da46b5dfef48658d03347cda21532bcdbb521e67",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/trace/blktrace.c"
    ],
    "versions": [
      {
        "version": "3.8",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.8",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.136",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.82",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.19.7",
        "lessThanOrEqual": "6.19.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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