CVE-2025-4877
4.5 MEDIUMThere's a vulnerability in the libssh package where when a libssh consumer passes in an unexpectedly large input buffer to ssh_get_finger...
Published: 2025-08-20 · Last updated: 2026-05-19
Severity and scoring
- CVSS
- 4.5 MEDIUM
- Vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
- CWE
- CWE-787
Description
There's a vulnerability in the libssh package where when a libssh consumer passes in an unexpectedly large input buffer to ssh_get_fingerprint_hash() function. In such cases the bin_to_base64() function can experience an integer overflow leading to a memory under allocation, when that happens it's possible that the program perform out of bounds write leading to a heap corruption. This issue affects only 32-bits builds of libssh.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2025-4877
- [Other]https://access.redhat.com/errata/RHSA-2026:18683
- [Other]https://access.redhat.com/security/cve/CVE-2025-4877
- [Other]https://bugzilla.redhat.com/show_bug.cgi?id=2376193
- [Other]https://git.libssh.org/projects/libssh.git/commit/?h=stable-0.11&id=6fd9cc8ce3958092a1aae11f1f2e911b2747732d
- [Other]https://www.libssh.org/security/advisories/CVE-2025-4877.txt
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