mm/damon/lru_sort: handle ctx allocation failure

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Summary

CVECVE-2026-53335
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-01 14:16:41 UTC
Updated2026-07-01 14:16:41 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: mm/damon/lru_sort: handle ctx allocation failure DAMON_LRU_SORT allocates the damon_ctx object for its kdamond in its init function. damon_lru_sort_enabled_store() wrongly assumes the allocation will always succeed once tried. If the damon_ctx allocation was failed, therefore, code execution reaches to damon_commit_ctx() while 'ctx' is NULL. As a result, it dereferences the NULL 'ctx' pointer. Avoid the NULL dereference by returning -ENOMEM if 'ctx' is NULL.

Risk And Classification

EPSS: 0.001660000 probability, percentile 0.062100000 (date 2026-07-04)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c4a8e662c839ac0003e4781aa324cb2d68ed9cb1 6d48f15659395bf1381114f01be91bc68e0be46a git Not specified
CNA Linux Linux affected c4a8e662c839ac0003e4781aa324cb2d68ed9cb1 daab1996431a71f43219dcac48ecc9ad2aad3f1c git Not specified
CNA Linux Linux affected c4a8e662c839ac0003e4781aa324cb2d68ed9cb1 ab04340b5ae5d52c1d46b750538febcde9d889e7 git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 6.18.36 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.13 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/6d48f15659395bf1381114f01be91bc68e0be46a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ab04340b5ae5d52c1d46b750538febcde9d889e7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/daab1996431a71f43219dcac48ecc9ad2aad3f1c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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