Quick answers
- Is CVE-2026-104042 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-104042 being exploited in the wild.
- How severe is CVE-2026-104042?
- Medium severity, with a CVSS score of 5.5, published 6 October 2026.
- Which products and versions are affected?
- sssd.
- Is there a fix for CVE-2026-104042?
- 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-2026-104042 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-104042?
- 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
Out-of-bounds read vulnerability (CWE-125) in sssd's PAM responder caused by missing input validation on authentication tokens. A local attacker with low privileges can send a zero-length authentication token to the responder socket, causing the service to read beyond buffer boundaries and crash. No privilege escalation or data exposure occurs; impact is limited to denial of service.
Affected products
- sssd
Timeline
- 2026-10-06: disclosed