ksmbd: add chann_lock to protect ksmbd_chann_list xarray
Summary
| CVE | CVE-2026-23226 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-02-18 16:22:32 UTC |
| Updated | 2026-04-02 15:16:23 UTC |
| 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. |
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
| 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 | 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 | 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 1d9c4172110e645b383ff13eee759728d74f1a5d 4c2ca31608521895dd742a43beca4b4d29762345 git | Not specified |
| CNA | Linux | Linux | affected 1d9c4172110e645b383ff13eee759728d74f1a5d e4a8a96a93d08570e0405cfd989a8a07e5b6ff33 git | Not specified |
| CNA | Linux | Linux | affected 1d9c4172110e645b383ff13eee759728d74f1a5d 36ef605c0395b94b826a8c8d6f2697071173de6e git | Not specified |
| CNA | Linux | Linux | affected 1d9c4172110e645b383ff13eee759728d74f1a5d 4f3a06cc57976cafa8c6f716646be6c79a99e485 git | Not specified |
| CNA | Linux | Linux | affected b1caecbf34b8c8260d851ec4efde71f3694460b7 git | Not specified |
| CNA | Linux | Linux | affected 91bbf9cb2387a0d76322e9a343bc6bc160f66b3f git | Not specified |
| CNA | Linux | Linux | affected 853c416710b075153c1e1421e099ffbe5dac68ce git | Not specified |
| CNA | Linux | Linux | affected 6.3 | Not specified |
| CNA | Linux | Linux | unaffected 6.3 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.77 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.11 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19.1 6.19.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/4f3a06cc57976cafa8c6f716646be6c79a99e485 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/e4a8a96a93d08570e0405cfd989a8a07e5b6ff33 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/4c2ca31608521895dd742a43beca4b4d29762345 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/36ef605c0395b94b826a8c8d6f2697071173de6e | 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.