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CVE-2025-39838 cifs: prevent NULL pointer dereference in UTF16 conversion
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
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| Linux 6.17 | premières → < 6.17 | 6.17 |
| Linux 6.16 | premières → < 6.16.6 | 6.16.6 |
| Linux | 6.12 | 6.12.46 |
| SIMATIC CN 4100 5.0 | premières → < 5.0 | 5.0 |
Références
- git.kernel.org git.kernel.org
- git.kernel.org git.kernel.org
- git.kernel.org git.kernel.org
Chronologie
- Publiée
- Dernière modification
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