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… (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.
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… (CVE-2026-12610)
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 v3.1
Score 6.4medium
Affected software
pkg:deb/ubuntu/sssd?arch=source&distro=xenialpkg:deb/ubuntu/sssd?arch=source&distro=bionicpkg:deb/ubuntu/sssd?arch=source&distro=focalpkg:deb/ubuntu/sssd?arch=source&distro=jammypkg:deb/ubuntu/sssd?arch=source&distro=noblepkg:deb/ubuntu/sssd?arch=source&distro=questingpkg:deb/ubuntu/sssd?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-12610
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a8d9aedacd9273b493e1887
Added to database: 08/25/2026, 13:38:53 UTC
Last updated: 08/25/2026, 15:52:33 UTC
Views: 4
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