liveupdate: fix TOCTOU race in luo_session_retrieve()

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Summary

CVECVE-2026-74370
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:38 UTC
Updated2026-08-15 06:22:38 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: liveupdate: fix TOCTOU race in luo_session_retrieve() Extend the scope of the rwsem_read lock in luo_session_retrieve() to overlap with the acquisition of the session mutex. This prevents a concurrent thread from releasing and freeing the session between the lookup and the mutex lock.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0153094d03df5a2e834a19c59b255649a258ae46 d944170607b872a1f93713c555ad3f0efde3a9b8 git Not specified
CNA Linux Linux affected 0153094d03df5a2e834a19c59b255649a258ae46 d3ae9e7fddb4036f50003d7fa1ef52801fdb961b git Not specified
CNA Linux Linux affected 6.19 Not specified
CNA Linux Linux unaffected 6.19 semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d944170607b872a1f93713c555ad3f0efde3a9b8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d3ae9e7fddb4036f50003d7fa1ef52801fdb961b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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