CVE-2026-12610 — MEDIUM (6.4)

Vulnerability Description

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.

CVSS Score

6.4

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Fedoraproject	Sssd	-
Redhat	Enterprise Linux	8.0

Related Weaknesses (CWE)

CWE-825

References

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

FAQ

What is CVE-2026-12610?

CVE-2026-12610 is a vulnerability with a CVSS score of 6.4 (MEDIUM). 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 co...

How severe is CVE-2026-12610?

CVE-2026-12610 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-12610?

Check the references section above for vendor advisories and patch information. Affected products include: Fedoraproject Sssd, Redhat Enterprise Linux.