CVE-2026-104037: SSSD integer underflow in autofs responder

CVE-2026-104037 · Severity: medium · CVSS 5.5 · Published 2026-10-06

SSSD is a system service that manages authentication and authorization for Linux systems. A local attacker can send a malformed request to the autofs responder component, causing an integer underflow that crashes the responder process and results in a denial of service. Only systems with autofs responder enabled in SSSD are affected.

Technologies: Red Hat SSSD. Vendors: Red Hat.

Quick answers

Is CVE-2026-104037 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-104037 being exploited in the wild.
How severe is CVE-2026-104037?
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-2026-104037?
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-2026-104037 attacked?
It is attacked with local access.
Am I affected by CVE-2026-104037?
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 autofs responder UNIX socket handler occurs when processing a specially crafted request with an invalid packet length field. This causes an out-of-bounds memory read that crashes the responder process. The vulnerability requires local access and low privileges, resulting in denial of service to the autofs responder only.

Affected products

  • Red Hat SSSD

Timeline

  • 2026-10-06: disclosed

References

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