CVE-2026-104037 Red Hat CVE debrief

Who should care

System administrators and security teams responsible for systems using SSSD, especially those with local attacker access, should assess exposure and implement mitigations. This includes reviewing configurations, monitoring for exploitation attempts, and verifying system logs for signs of exploitation. Prioritization of remediation efforts is crucial for systems with confirmed exposure.

Why it matters

CVE-2026-104037 is a medium-severity vulnerability in SSSD that can cause a denial of service. Defenders should verify exposure, especially for systems with local attacker access, and prioritize remediation.

• Denial of service (DoS) via system crash
• Potential for local privilege escalation requires verification
• Need for verification of affected versions and systems
• Remediation priority for systems using SSSD

Technical summary

A flaw in SSSD allows a local attacker to cause a denial of service by exploiting an integer underflow and out-of-bounds memory read in the autofs responder UNIX socket. This vulnerability can lead to a system crash and potential denial of service. Defenders should focus on verifying exposure, especially in systems with local attacker access, and prioritize remediation efforts accordingly. The technical impact involves a medium-severity vulnerability that can be mitigated through configuration updates and monitoring.

Defensive priority

Medium priority for systems using SSSD, especially those with local attacker access.

Recommended defensive actions

• Review and update SSSD configurations to limit local access to the autofs responder UNIX socket.
• Implement monitoring to detect potential exploitation attempts.
• Verify system logs for signs of exploitation.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record and source item provide details on the vulnerability, but specific version information and remediation steps are not provided. Defenders should verify exposure, especially for systems with local attacker access, and prioritize remediation. Evidence is limited, and further verification tasks are necessary to confirm affected versions and systems.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.