CVE-2025-21945
Medium
Elevated severity or exploit probability.
CVSS base
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
0.5%
42.2th percentile
CISA KEV
Not listed
Weakness / dates
CWE-416
Published 2025-04-01 · modified 2026-07-30
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2025-04-01 — Published (NVD)
- 2026-07-30 — Last modified (NVD)
Description
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.
Affected
References
- https://git.kernel.org/stable/c/410ce35a2ed6d0e114132bba29af49b69880c8c7
- https://git.kernel.org/stable/c/636e021646cf9b52ddfea7c809b018e91f2188cb
- https://git.kernel.org/stable/c/84d2d1641b71dec326e8736a749b7ee76a9599fc
- https://git.kernel.org/stable/c/8573571060ca466cbef2c6f03306b2cc7b883506
- https://git.kernel.org/stable/c/a0609097fd10d618aed4864038393dd75131289e
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html