CVE-2026-12610

A flaw was found in sssd. When authenticating with a YubiKey, the SSSD PAM responder can crash due to a use-after-free vulnerability, where a memory pointer is incorrectly handled. A local attacker could exploit this flaw by manipulating smartcard or YubiKey contents, leading to a denial of service that disrupts authentication. This vulnerability also presents a potential for privilege escalation, although it is difficult to exploit.

Score

CVSS 3.1 6.4 Medium

Status

Undergoing Analysis - secalert@redhat.com

Published

2026-06-30

Last modified

2026-08-31

Weaknesses

CWE-825

Affected products

• Sssd (Fedoraproject)
• Enterprise Linux (Redhat)
• Hummingbird (Redhat)
• Openshift (Redhat)

References

• https://access.redhat.com/security/cve/CVE-2026-12610
• https://bugzilla.redhat.com/show_bug.cgi?id=2490288
• https://github.com/SSSD/sssd/issues/8796