Quick answers
- Is CVE-2026-104043 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-104043 being exploited in the wild.
- How severe is CVE-2026-104043?
- Medium severity, with a CVSS score of 5.5, published 6 October 2026.
- Which products and versions are affected?
- Red Hat SSSD.
- Is there a fix for CVE-2026-104043?
- 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-2026-104043 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-104043?
- Check whether you run Red Hat 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 integer underflow in the NSS responder's packet parsing logic allows a local attacker to send a specially crafted request with an undersized packet header, triggering an out-of-bounds memory read. The attack requires local access to the NSS UNIX domain socket and low privilege level; exploitation causes the responder process to crash, denying service to identity and group resolution operations. The vulnerability is CWE-125 (out-of-bounds read) with no code execution or privilege escalation possible.
Affected products
- Red Hat SSSD
Timeline
- 2026-10-06: disclosed