Fedoraproject Sssd
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.
What this means for your business
- It affects Fedoraproject Sssd. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it only with access to the machine itself, with an administrator login, and without anyone at your company clicking anything.
What to do
- 1Check whether your company or your suppliers run Fedoraproject Sssd, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 6.4 (v3.1)
- Vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H- Weakness
- CWE-825
- Assigned by
- secalert@redhat.com
Dates
- Published
- 2026-06-30
- Last modified
- 2026-08-31
- Sources
- NVD
Affected products
- Fedoraproject Sssdall versions
- Redhat Enterprise Linux8.0, 9.0, 10.0
As listed in the NVD configuration data. Not a statement about your estate.