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CVE-2026-68438 smp: Make CSD lock acquisition atomic for debug mode

🗓️ 12 Aug 2026 00:07:27Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 8 Views

Linux kernel CSD lock race in smp_call_function_single allows concurrent sender deadlock via non-atomic read-modify-write.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-68438
12 Aug 202600:07
attackerkb
cve
CVE
CVE-2026-68438
12 Aug 202600:07
cve
euvd
EUVD
EUVD-2026-57046
12 Aug 202600:07
euvd
nvd
NVD
CVE-2026-68438
12 Aug 202600:17
nvd
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/smp.c"
    ],
    "versions": [
      {
        "version": "b0473dcd4b1d7e2e44947e7ac1820c73a268821a",
        "lessThan": "282d220bae5fbfc90cf0e3d5b5e42c00ad79f989",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b0473dcd4b1d7e2e44947e7ac1820c73a268821a",
        "lessThan": "35551efb155e3b83445a6c3f66cb498d5efc182c",
        "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/smp.c"
    ],
    "versions": [
      {
        "version": "7.1",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "7.1",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.6",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2-rc5",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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