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.

CVSS v3 6.4 MEDIUM

6.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.5 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:fedoraproject:sssd:-:::::::*
	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:10.0:::::::*

History

30 Jun 2026, 20:08

Type	Values Removed	Values Added
CPE		cpe:2.3:o:redhat:enterprise_linux:10.0:::::::* cpe:2.3:o:redhat:enterprise_linux:9.0:::::::* cpe:2.3:o:redhat:enterprise_linux:8.0:::::::* cpe:2.3:a:fedoraproject:sssd:-:::::::*
References	~~() https://access.redhat.com/security/cve/CVE-2026-12610 -~~	() https://access.redhat.com/security/cve/CVE-2026-12610 - Mitigation, Vendor Advisory
References	~~() https://bugzilla.redhat.com/show_bug.cgi?id=2490288 -~~	() https://bugzilla.redhat.com/show_bug.cgi?id=2490288 - Vendor Advisory
References	~~() https://github.com/SSSD/sssd/issues/8796 -~~	() https://github.com/SSSD/sssd/issues/8796 - Issue Tracking, Mitigation
First Time		Fedoraproject Fedoraproject sssd Redhat enterprise Linux Redhat

30 Jun 2026, 10:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-30 10:16

Updated : 2026-06-30 20:08

NVD link : CVE-2026-12610

Mitre link : CVE-2026-12610

CVE.ORG link : CVE-2026-12610

JSON object : View

Products Affected

redhat

enterprise_linux

fedoraproject

sssd

CWE

CWE-825

Expired Pointer Dereference

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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."}], "lastModified": "2026-06-30T20:08:54.443", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:fedoraproject:sssd:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B0ABAA03-C8E0-4281-AF60-D29246CA6B2D"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D65C2163-CFC2-4ABB-8F4E-CB09CEBD006C"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}