Description
In the Linux kernel, the following vulnerability has been resolved:
cifs: prevent NULL pointer dereference in UTF16 conversion
There can be a NULL pointer dereference bug here. NULL is passed to __cifs_sfu_make_node without checks, which passes it unchecked to cifs_strndup_to_utf16, which in turn passes it to cifs_local_to_utf16_bytes where '*from' is dereferenced, causing a crash.
This patch adds a check for NULL 'src' in cifs_strndup_to_utf16 and returns NULL early to prevent dereferencing NULL pointer.
Found by Linux Verification Center (linuxtesting.org) with SVACE
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 41d3f256c6a5e41eb32b87168399c0facd512dc0, < 1f797f062b5cf13a1c2bcc23285361baaa7c9260; >= 41d3f256c6a5e41eb32b87168399c0facd512dc0, < 3c26a8d30ed6b53a52a023ec537dc50a6d34a67a; >= 41d3f256c6a5e41eb32b87168399c0facd512dc0, < 70bccd9855dae56942f2b18a08ba137bb54093a0 |
| Linux | Linux | 6.12 |
| Siemens | SIMATIC CN 4100 | < V5.0 |
References
- https://git.kernel.org/stable/c/1f797f062b5cf13a1c2bcc23285361baaa7c9260Patch
- https://git.kernel.org/stable/c/3c26a8d30ed6b53a52a023ec537dc50a6d34a67aPatch
- https://git.kernel.org/stable/c/70bccd9855dae56942f2b18a08ba137bb54093a0Patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
Timeline
- Published
- Sep 19, 2025
- Last modified
- Nov 5, 2026
- NVD status
- Modified