Buffer overflow in Freebsd
CVE-2025-0373
On 64-bit systems, the implementation of VOP_VPTOFH() in the cd9660, tarfs and ext2fs filesystems overflows the destination FID buffer by 4 bytes, a stack buffer overflow. A NFS server that exports a cd9660, tarfs, or ext2fs file system can be made to panic by mounting and accessing the export with an NFS client. Further exploitation (e.g., bypassing file permission checking or remote kernel code execution) is potentially possible, though this has not been demonstrated. In particular, release kernels are compiled with stack protection enabled, and some instances of the overflow are caught by this mechanism, causing a panic.
Vulnerability class: Buffer Overflow
EPSS: 0.004 (34.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H.
Affected products
- Freebsd — versions 14.2-RELEASE, 14.1-RELEASE, 13.4-RELEASE
Weakness classification (CWE)
References
- secteam@freebsd.org (vendor-advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-0373?
- CVE-2025-0373 is a medium-severity vulnerability in Freebsd, classified under Stack-based Buffer Overflow. CVSS score: 6.0/10. Published 2025-01-30.
- How severe is CVE-2025-0373?
- Medium severity. CVSS v3 base score is 6.0 out of 10.