ksmbd: smbdirect: validate data_offset and data_length field of smb_direct_data_transfer
Priority MEDIUM 40CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · Low · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: smbdirect: validate data_offset and data_length field of smb_direct_data_transfer If data_offset and data_length of smb_direct_data_transfer struct are invalid, out of bounds issue could happen. This patch validate data_offset and data_length field in recv_done.
Why it matters now
EPSS 0.00264 18th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 5.15.194, 6.1.154, 6.6.108 +3
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.15 and later | 5.15.194, 6.1.154, 6.6.108, 6.12.49, 6.16.9, 6.17 | Patch available | CNA |
- Linux VendorLinux Affected 5.15 and later Fixed in 5.15.194, 6.1.154, 6.6.108, 6.12.49, 6.16.9, 6.17 Patch available CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.15.1 to before 5.15.194; 5.16 to before 6.1.154; 6.2 to before 6.6.108; 6.7 to before 6.12.49; 6.13 to before 6.16.9 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.15:-:*:*:*:*:*:* | 5.15 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.15:rc7:*:*:*:*:*:* | 5.15 rc7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* | 6.17 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* | 6.17 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:* | 6.17 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:* | 6.17 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:* | 6.17 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.17:rc6:*:*:*:*:*:* | 6.17 rc6 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.15.1 to before 5.15.194; 5.16 to before 6.1.154; 6.2 to before 6.6.108; 6.7 to before 6.12.49; 6.13 to before 6.16.9 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.15:-:*:*:*:*:*:* Versions 5.15 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.15:rc7:*:*:*:*:*:* Versions 5.15 rc7 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* Versions 6.17 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* Versions 6.17 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:* Versions 6.17 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:* Versions 6.17 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:* Versions 6.17 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.17:rc6:*:*:*:*:*:* Versions 6.17 rc6 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.15.194, 6.1.154, 6.6.108, 6.12.49, 6.16.9, 6.17
Vendor assessments
Red Hat
Red Hat rating: Low. 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-2025-39943
- 2026-10-03 Alias added: GHSA-xw7x-gch6-cpx7
- 2026-11-07 Affected versions changed · Red Hat
References
Patch 6
- https://git.kernel.org/stable/c/773fddf976d282ef059c36c575ddb81567acd6bc
- https://git.kernel.org/stable/c/bdaab5c6538e250a9654127e688ecbbeb6f771d5
- https://git.kernel.org/stable/c/eb0378dde086363046ed3d7db7f126fc3f76fd70
- https://git.kernel.org/stable/c/8be498fcbd5b07272f560b45981d4b9e5a2ad885
- https://git.kernel.org/stable/c/529b121b00a6ee3c88fb3c01b443b2b81f686d48
- https://git.kernel.org/stable/c/5282491fc49d5614ac6ddcd012e5743eecb6a67c
More Linux Kernel vulnerabilities
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- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- 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-2025-39943 · CVE Program
- CVE-2025-39943 · NVD
- FIRST EPSS
- GHSA-xw7x-gch6-cpx7 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-39943 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences