CVE-2026-12610
Publication date 30 June 2026
Last updated 2 September 2026
Ubuntu priority
Medium
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| sssd | 26.04 LTS resolute |
Fixed 2.12.0-1ubuntu5.3
|
| 25.10 questing | Ignored end of life, was needs-triage | |
| 24.04 LTS noble |
Fixed 2.9.4-1.1ubuntu6.7
|
|
| 22.04 LTS jammy |
Fixed 2.6.3-1ubuntu3.8
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
Patch details
For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?
| Package | Patch details |
|---|---|
| sssd |
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score 6.4 · Medium
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
References
Related Ubuntu Security Notices (USN)
- USN-8672-1
- SSSD vulnerability
- 25 August 2026