Quick answers
- Is CVE-2026-104030 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-104030 being exploited in the wild.
- How severe is CVE-2026-104030?
- Medium severity, with a CVSS score of 5.5, published 5 October 2026.
- Which products and versions are affected?
- sssd sssd.
- Is there a fix for CVE-2026-104030?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-104030 attacked?
- It is attacked with local access, in a hosted service.
- Am I affected by CVE-2026-104030?
- Check whether you run Sssd. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An out-of-bounds read vulnerability (CWE-125) exists in sssd's PAM responder when parsing passkey authentication tokens that lack null terminators. A local unprivileged attacker can trigger a buffer over-read that causes the sssd process to crash, disrupting authentication services. The vulnerability requires local system access and does not permit privilege escalation or code execution.
Affected products
- sssd sssd
Timeline
- 2026-10-05: disclosed