um: Fix potential race condition in TLB sync

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Summary

CVECVE-2026-53020
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-24 17:17:13 UTC
Updated2026-06-24 17:17:13 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: um: Fix potential race condition in TLB sync During the TLB sync, we need to traverse and modify the page table, so we should hold the page table lock. Since full SMP support for threads within the same process is still missing, let's disable the split page table lock for simplicity.

Risk And Classification

EPSS: 0.001550000 probability, percentile 0.050380000 (date 2026-06-26)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1e4ee5135d814fe4785890790cec81c3132888fb f21c343ec7419377bff89ab11146c03ae117036f git Not specified
CNA Linux Linux affected 1e4ee5135d814fe4785890790cec81c3132888fb 102331b66bcaf1f41f50b9c4cd5c36e46bafa9f3 git Not specified
CNA Linux Linux affected 6.19 Not specified
CNA Linux Linux unaffected 6.19 semver Not specified
CNA Linux Linux unaffected 7.0.10 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f21c343ec7419377bff89ab11146c03ae117036f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/102331b66bcaf1f41f50b9c4cd5c36e46bafa9f3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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