CVE-2026-14164 Red Hat CVE debrief

Who should care

Defenders responsible for systems handling RAR5 archives, particularly those using libarchive, should assess exposure and prioritize patching. This includes operators, platform administrators, vulnerability management teams, and security teams who need to ensure the security and stability of their systems. They should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Why it matters

CVE-2026-14164 is a double free issue in libarchive's RAR5 reader that can cause denial of service. Defenders should prioritize patching and verifying system updates.

• Denial of service due to application termination
• Potential for service disruption in systems handling RAR5 archives
• Need for verification of patch application and system updates
• Possible impact on system stability and reliability

Technical summary

The double free issue in libarchive's RAR5 reader can cause applications using the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service. This issue may result in service disruption in systems handling RAR5 archives and requires defenders to prioritize patching and verifying system updates. Successful exploitation may cause applications using the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service. The issue is particularly concerning for systems handling RAR5 archives, as it can lead to denial of service due to application termination.

Defensive priority

Defenders should prioritize verifying and applying patches for libarchive, particularly in systems handling RAR5 archives.

Recommended defensive actions

• Verify and apply patches for libarchive
• Review and update systems handling RAR5 archives
• Monitor for and respond to potential denial of service attempts
• Conduct vulnerability scanning to identify exposed systems
• Implement compensating controls for exposed systems
• Track exceptions and retest remediated assets
• technicalSummary

Evidence notes

The CVE record and NVD entry provide details on the double free issue in libarchive's RAR5 reader. Red Hat has released several errata related to this vulnerability, including RHSA-2026:30333, RHSA-2026:52674, and RHSA-2026:52675. Defenders should verify patch application and system updates, considering potential denial of service attempts and service disruption in systems handling RAR5 archives.

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.