CVE-2025-4877

Published: Aug 20, 2025

Modified: May 19, 2026

PUBLISHED

CVSS v3.1

4.5

MEDIUM

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.

Vendor	Product	Versions
Unknown	libssh	affected `0 - < 0.11.2`
Red Hat	Red Hat Enterprise Linux 9	unaffected `0:0.10.4-18.el9 - < *`
Red Hat	Red Hat Enterprise Linux 9	unaffected `0:0.10.4-18.el9 - < *`
Red Hat	Red Hat Enterprise Linux 10	All versions
Red Hat	Red Hat Enterprise Linux 6	All versions
Red Hat	Red Hat Enterprise Linux 7	All versions
Red Hat	Red Hat Enterprise Linux 8	All versions
Red Hat	Red Hat OpenShift Container Platform 4	All versions