CVE-2026-15520 GNU CVE debrief

Who should care

Users of GNU LibreDWG 0.13.4-154-g0b573035 should be aware of this vulnerability and take steps to upgrade to a fixed version. Operators, platform administrators, vulnerability management teams, and security teams may be impacted by this vulnerability.

Technical summary

The vulnerability is caused by a heap-based buffer overflow in the decompress_R2004_section function of the src/decode.c file in the R2004 Section Decompression component of GNU LibreDWG 0.13.4-154-g0b573035. The attack requires local access and has been publicly disclosed. The vulnerability can be fixed by upgrading to version 0.14.8396 or later and applying patch 3d0f9fc2eddbd6579c99af3111c37c98f03475d0.

Defensive priority

Low priority due to local access requirement and low CVSS score.

Recommended defensive actions

• Upgrade to version 0.14.8396 or later
• Apply patch 3d0f9fc2eddbd6579c99af3111c37c98f03475d0
• Monitor for local access exploitation attempts
• 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
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-07-13T02:16:10.543Z and has not been modified since then. The NVD entry is currently Received. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity with the vendor. The vulnerability is caused by a heap-based buffer overflow in the decompress_R2004_section function of the src/decode.c file in the R2004 Section Decompression component of GNU LibreDWG 0.13.4-154-g0b573035.

Official resources