ksmbd: fix use-after-free in ksmbd_sessions_deregister()
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in ksmbd_sessions_deregister() In multichannel mode, UAF issue can occur in session_deregister when the second channel sets up a session through the connection of the first channel. session that is freed through the global session table can be accessed again through ->sessions of connection.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.15 and later | 6.1.134, 6.6.87, 6.12.23, 6.13.11, 6.14.2, 6.15 | Patch available | CNA |
- Linux VendorLinux Affected 5.15 and later Fixed in 6.1.134, 6.6.87, 6.12.23, 6.13.11, 6.14.2, 6.15 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | before 6.1.134; 6.2 to before 6.6.87; 6.7 to before 6.12.13; 6.13 to before 6.13.11; 6.14 to before 6.14.2 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 6.1.134; 6.2 to before 6.6.87; 6.7 to before 6.12.13; 6.13 to before 6.13.11; 6.14 to before 6.14.2 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.1.134, 6.6.87, 6.12.23, 6.13.11, 6.14.2, 6.15
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2025-22041
- 2026-10-03 Alias added: GHSA-gj89-4h85-hv53
References
Patch 6
- https://git.kernel.org/stable/c/f0eb3f575138b816da74697bd506682574742fcd
- https://git.kernel.org/stable/c/a8a8ae303a8395cbac270b5b404d85df6ec788f8
- https://git.kernel.org/stable/c/ca042cc0e4f9e0d2c8f86dd67e4b22f30a516a9b
- https://git.kernel.org/stable/c/8ed0e9d2f410f63525afb8351181eea36c80bcf1
- https://git.kernel.org/stable/c/33cc29e221df7a3085ae413e8c26c4e81a151153
- https://git.kernel.org/stable/c/15a9605f8d69dc85005b1a00c31a050b8625e1aa
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- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2025-22041 · CVE Program
- CVE-2025-22041 · NVD
- FIRST EPSS
- GHSA-gj89-4h85-hv53 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-22041 · Red Hat security data · CC BY 4.0
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