CVE-2025-4877: Red Hat Enterprise Linux 10

Medium severity, CVSS 4.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Red Hat Red Hat Enterprise Linux 10
• Red Hat Red Hat Enterprise Linux 6
• Red Hat Red Hat Enterprise Linux 7
• Red Hat Red Hat Enterprise Linux 8
• Red Hat Red Hat Enterprise Linux 9: before 0:0.10.4-18.el9 (fixed in 0:0.10.4-18.el9)
• Red Hat Red Hat Openshift Container Platform 4

Published 2025-08-20. Last modified 2026-08-31.