CVE-2026-80048 Red Hat CVE debrief

Who should care

System administrators and security teams responsible for Red Hat Enterprise Linux systems, especially those with local access, should assess exposure and prioritize updates to mitigate potential risks. Additionally, operators and security teams managing `sssd-kcm` deployments should review system configurations and verify affected systems to ensure system security and prevent potential denial of service.

Why it matters

CVE-2026-80048 is a local denial of service vulnerability in `sssd-kcm` that can be exploited by a local user or process, leading to memory exhaustion and potential system impact. Defenders should verify affected systems, restrict access, and prioritize updates.

• Potential denial of service due to memory exhaustion.
• Need to verify affected systems and configurations.
• Possible impact on system performance and availability.
• Requires updates to `sssd-kcm` for remediation.

Technical summary

A flaw in `sssd-kcm` allows a local user or process to cause a denial of service by exploiting the UNIX socket with a large request length header and stalling the connection, leading to memory exhaustion. This vulnerability affects `sssd-kcm` deployments and can be mitigated by verifying affected systems, restricting local access, and updating `sssd-kcm` to prevent potential denial of service. The issue requires careful review of system configurations and updates to prevent potential exploitation. Defenders should prioritize verifying affected systems and configurations to ensure system security.

Defensive priority

Defenders should prioritize verifying affected systems, especially those with local access, and update `sssd-kcm` to prevent potential denial of service.

Recommended defensive actions

• Verify if systems are affected by checking `sssd-kcm` versions and configurations.
• Restrict local access to `sssd-kcm` UNIX socket.
• Monitor system memory usage for anomalies.
• Update `sssd-kcm` when patches are available.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and source item provide details on the vulnerability. However, specific versions affected and remediation steps require verification from official sources. Defenders should verify affected systems, especially those with local access, and review official advisories for accurate information. The vulnerability details indicate a need for careful review of system configurations and updates to prevent potential exploitation.

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.