CVE-2026-12610

Publication date 30 June 2026

Last updated 2 September 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.4 · Medium

Score breakdown

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)

Other references

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