nvme: fix command effects log lifetime for multipath heads

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Summary

CVECVE-2026-98814
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-18 16:17:35 UTC
Updated2026-10-19 10:19:45 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: nvme: fix command effects log lifetime for multipath heads KASAN reported a use-after-free when an I/O passthrough command was sent through a multipath namespace head after the controller path that first created the head had been removed: BUG: KASAN: slab-use-after-free in nvme_command_effects+0x192/0x200 [nvme_core] Read of size 4 at addr ffff888141b14400 by task nvme/19811 nvme_command_effects+0x192/0x200 [nvme_core] nvme_cmd_allowed+0x7e/0x1b0 [nvme_core] nvme_user_cmd.constprop.0+0x1b5/0x450 [nvme_core] nvme_ns_head_chr_ioctl+0xf4/0x2a0 [nvme_core] Move the log cache to the subsystem, with one entry per command set. Both controllers and namespace heads hold subsystem references, keeping their log pointers valid until subsystem release.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected be93e87e780253780df9bb6ecc9bc1199b0d94c3 351d1c47e45b2b35780d0548b1012d7242ba298d git Not specified
CNA Linux Linux affected be93e87e780253780df9bb6ecc9bc1199b0d94c3 72ece656abd4de8645a421fb482d7a11e6533a45 git Not specified
CNA Linux Linux affected 5.9 Not specified
CNA Linux Linux unaffected 5.9 semver Not specified
CNA Linux Linux unaffected 7.2.10 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/351d1c47e45b2b35780d0548b1012d7242ba298d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/72ece656abd4de8645a421fb482d7a11e6533a45 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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