ksmbd: fix use-after-free in smb2_lock
Summary
| CVE | CVE-2025-21945 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-04-01 16:15:25 UTC |
| Updated | 2026-07-30 06:21:58 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 7.8 HIGH from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Problem Types: CWE-416 | CWE-416 CWE-416 Use After Free
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | ADP | DECLARED | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 0626e6641f6b467447c81dd7678a69c66f7746cf 410ce35a2ed6d0e114132bba29af49b69880c8c7 git | Not specified |
| CNA | Linux | Linux | affected 0626e6641f6b467447c81dd7678a69c66f7746cf 8573571060ca466cbef2c6f03306b2cc7b883506 git | Not specified |
| CNA | Linux | Linux | affected 0626e6641f6b467447c81dd7678a69c66f7746cf a0609097fd10d618aed4864038393dd75131289e git | Not specified |
| CNA | Linux | Linux | affected 0626e6641f6b467447c81dd7678a69c66f7746cf 636e021646cf9b52ddfea7c809b018e91f2188cb git | Not specified |
| CNA | Linux | Linux | affected 0626e6641f6b467447c81dd7678a69c66f7746cf 84d2d1641b71dec326e8736a749b7ee76a9599fc git | Not specified |
| CNA | Linux | Linux | affected 5.15 | Not specified |
| CNA | Linux | Linux | unaffected 5.15 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.131 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.83 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.19 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.13.7 6.13.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.14 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/636e021646cf9b52ddfea7c809b018e91f2188cb | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| lists.debian.org/debian-lts-announce/2025/05/msg00045.html | af854a3a-2127-422b-91ae-364da2661108 | lists.debian.org | |
| git.kernel.org/stable/c/8573571060ca466cbef2c6f03306b2cc7b883506 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/84d2d1641b71dec326e8736a749b7ee76a9599fc | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/410ce35a2ed6d0e114132bba29af49b69880c8c7 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/a0609097fd10d618aed4864038393dd75131289e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.