Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath When cifs_sanitize_prepath is called with an empty string or a string containing only delimiters (e.g., "/"), the current logic attempts to check *(cursor2 - 1) before cursor2 has advanced. This results in an out-of-bounds read. This patch adds an early exit check after stripping prepended delimiters. If no path content remains, the function returns NULL. The bug was identified via manual audit and verified using a standalone test case compiled with AddressSanitizer, which triggered a SEGV on affected inputs.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.16.1, < 6.6.136 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/2d29214448ec0f4e7e18bb1c14dd4a6c07f1c439Patch
- https://git.kernel.org/stable/c/49b1ce6d7cfb6c5a49f68bf5ccfcfb6ba14e63c3Patch
- https://git.kernel.org/stable/c/5d4fe469fe7dbff7d874c196bb680a82f2625d95Patch
- https://git.kernel.org/stable/c/78ec5bf2f589ec7fd8f169394bfeca541b077317Patch
- https://git.kernel.org/stable/c/86f9c23e0814cfdffda9eedf0c591c51ba209010Patch
FAQ
What is CVE-2026-43112?
CVE-2026-43112 is a vulnerability with a CVSS score of 8.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath When cifs_sanitize_prepath is called with an empty string or a stri...
How severe is CVE-2026-43112?
CVE-2026-43112 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43112?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.