Vulnerability Report

CVE-2026-12610

Title: Use-after-free and DoS in sssd with YubiKey

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2026-12610.

CWE Category CWE-825

Published Date Jun 30, 2026

Modified Date Jun 30, 2026

Exploit Status Not Found

Score 6.4 CVSS v3.1

Exploit Probability (EPSS)

0.16%

Vulnerability Summary

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.

Impacted Vendors

fedoraproject 1

fedorahosted 1

Reference Links

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

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

6.4

Attack Vector

LOCAL

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns