CVE-2025-21945
HIGH severity · CVSS 8.8 · Use-after-free
8.8CVSS HIGH
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb2_lock If smb_lock->zero_len has value, ->llist of smb_lock is not delete and flock is old one. It will cause use-after-free on error handling routine.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/410ce35a2ed6d0e114132bba29af49b69880c8c7 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/410ce35a2ed6d0e114132bba29af49b69880c8c7Patch
- https://git.kernel.org/stable/c/636e021646cf9b52ddfea7c809b018e91f2188cbPatch
- https://git.kernel.org/stable/c/84d2d1641b71dec326e8736a749b7ee76a9599fcPatch
- https://git.kernel.org/stable/c/8573571060ca466cbef2c6f03306b2cc7b883506Patch
- https://git.kernel.org/stable/c/a0609097fd10d618aed4864038393dd75131289ePatch
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html