drivers/base/memory: set mem->altmap after successful device registration

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64244
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-24 16:16:53 UTC
Updated2026-07-24 16:16:53 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drivers/base/memory: set mem->altmap after successful device registration If __add_memory_block() fails at xa_store() (under memory pressure for example), device_unregister() is called, which eventually triggers memory_block_release() with mem->altmap still set, causing a WARN_ON(mem->altmap). This was triggered by modifying virtio-mem driver. Fix this by delaying the assignment of mem->altmap until after __add_memory_block() has succeeded.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1a8c64e110435e44e71bcd50a75663174b575f22 802e113cf120df7208e4c7e604950a85e87120a8 git Not specified
CNA Linux Linux affected 1a8c64e110435e44e71bcd50a75663174b575f22 22dc0d042f02ce82aa61422ea5f232628bfd9e9c git Not specified
CNA Linux Linux affected 1a8c64e110435e44e71bcd50a75663174b575f22 6c25bf4e44a2b6a14332f952bba0974521f5b72d git Not specified
CNA Linux Linux affected 1a8c64e110435e44e71bcd50a75663174b575f22 bc3dd82a0ffd488bb902f4c69c3d28fd4088d973 git Not specified
CNA Linux Linux affected 1a8c64e110435e44e71bcd50a75663174b575f22 059ac6252a63edf1cea79bf30bd860a8c264b62c git Not specified
CNA Linux Linux affected 1a8c64e110435e44e71bcd50a75663174b575f22 a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a git Not specified
CNA Linux Linux affected 6.6 Not specified
CNA Linux Linux unaffected 6.6 semver Not specified
CNA Linux Linux unaffected 6.6.144 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.95 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.37 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.14 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1.2 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/6c25bf4e44a2b6a14332f952bba0974521f5b72d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a2b8d7827f48ee54a686cb80e4a1d0ff954ec42a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/802e113cf120df7208e4c7e604950a85e87120a8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bc3dd82a0ffd488bb902f4c69c3d28fd4088d973 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/22dc0d042f02ce82aa61422ea5f232628bfd9e9c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/059ac6252a63edf1cea79bf30bd860a8c264b62c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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