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Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add chann_lock to protect ksmbd_chann_list xarray ksmbd_chann_list xarray lacks synchronization, allowing use-after-free in multi-channel sessions (between lookup_chann_list() and ksmbd_chann_del). Adds rw_semaphore chann_lock to struct ksmbd_session and protects all xa_load/xa_store/xa_erase accesses.

PUBLISHED Reserved 2026-01-13 | Published 2026-02-18 | Updated 2026-02-23 | Assigner Linux

Product status

Default status
unaffected

1d9c4172110e645b383ff13eee759728d74f1a5d (git) before e4a8a96a93d08570e0405cfd989a8a07e5b6ff33
affected

1d9c4172110e645b383ff13eee759728d74f1a5d (git) before 36ef605c0395b94b826a8c8d6f2697071173de6e
affected

1d9c4172110e645b383ff13eee759728d74f1a5d (git) before 4f3a06cc57976cafa8c6f716646be6c79a99e485
affected

b1caecbf34b8c8260d851ec4efde71f3694460b7 (git)
affected

91bbf9cb2387a0d76322e9a343bc6bc160f66b3f (git)
affected

853c416710b075153c1e1421e099ffbe5dac68ce (git)
affected

Default status
affected

6.3
affected

Any version before 6.3
unaffected

6.18.11 (semver)
unaffected

6.19.1 (semver)
unaffected

7.0-rc1 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/e4a8a96a93d08570e0405cfd989a8a07e5b6ff33

git.kernel.org/...c/36ef605c0395b94b826a8c8d6f2697071173de6e

git.kernel.org/...c/4f3a06cc57976cafa8c6f716646be6c79a99e485

cve.org (CVE-2026-23226)

nvd.nist.gov (CVE-2026-23226)

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