CVE-2026-59847

Description

A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection.

CVSS breakdown

Affected products

• libssh / libssh
• RedHat / enterprise_linux8.0 – 8.0
• RedHat / enterprise_linux9.0 – 9.0
• RedHat / enterprise_linux10.0 – 10.0
• RedHat / hardened_images

References

• VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:42922
• VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:55855
• VENDOR_ADVISORYhttps://access.redhat.com/security/cve/CVE-2026-59847
• MISChttps://bugzilla.redhat.com/show_bug.cgi?id=2498180