ksmbd: drain session procfs readers before dropping table references

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-99280
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-07 14:17:03 UTC
Updated2026-11-07 14:17:03 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ksmbd: drain session procfs readers before dropping table references Session registration failure and connection cleanup can drop the table reference while the per-session procfs entry is still accessible. If a reader holds the last remaining reference, its final put calls proc_remove() from its own callback and waits for that callback to finish. Remove the procfs entry before dropping the table reference in the registration failure path. Queue sessions removed during connection cleanup and drain their procfs readers after releasing both session locks, then return their table references. Keep the global hash node unhashed while a session is queued so a concurrent unregister cannot drop the reference again. Previous-session replacement also destroys the file table before the session is finally freed. Detach the idr under the lock used by procfs file counters, and report zero files after it has been detached. This prevents a reader from accessing the idr during or after its destruction.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d7fd1f98607f2cd358e583f9548bdf0173090a86 6789f0983f8e85ce3a5ed8c50fc05d613ead9c2c git Not specified
CNA Linux Linux affected d7fd1f98607f2cd358e583f9548bdf0173090a86 1c087cf7d5386c708d8984b263280b42b3daada0 git Not specified
CNA Linux Linux affected c99ea7855124ca1428a1e59c2b4590aaef34eacf git Not specified
CNA Linux Linux affected 7.2.8 7.3 semver Not specified
CNA Linux Linux affected 7.3 Not specified
CNA Linux Linux unaffected 7.3 semver Not specified
CNA Linux Linux unaffected 7.3.2 7.3.* semver Not specified
CNA Linux Linux unaffected 7.4-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/1c087cf7d5386c708d8984b263280b42b3daada0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6789f0983f8e85ce3a5ed8c50fc05d613ead9c2c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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