CVE-2026-90803 GNU CVE debrief

Who should care

System administrators and developers using GNU Binutils 2.47 should assess their exposure and consider upgrading to version 2.48. Defenders should verify if GNU Binutils 2.47 is used in their environment and prioritize upgrading to version 2.48. The vulnerability requires local access to be exploited, and successful exploitation could lead to a denial of service (DoS) or potentially allow local attackers to execute arbitrary code.

Why it matters

CVE-2026-90803 is a buffer overflow vulnerability in GNU Binutils 2.47 that requires local access to exploit. Defenders should assess exposure, prioritize upgrading to version 2.48, and monitor for potential exploitation attempts.

• Local attackers may exploit this vulnerability to execute arbitrary code
• Successful exploitation could lead to a denial of service (DoS)
• Defenders should verify if GNU Binutils 2.47 is used in their environment and prioritize upgrading to version 2.48
• The exploit has been publicly disclosed, increasing the risk of exploitation

Technical summary

The elf_x86_64_relocate_section function in bfd/elf64-x86-64.c is vulnerable to a buffer overflow attack. This issue is addressed in GNU Binutils version 2.48. The vulnerability requires local access to be exploited. Defenders should assess exposure, prioritize upgrading to version 2.48, and monitor for potential exploitation attempts. The exploit has been publicly disclosed, increasing the risk of exploitation. System administrators and developers using GNU Binutils 2.47 should assess their exposure and consider upgrading to version 2.48.

Defensive priority

Upgrade to version 2.48 of GNU Binutils to address the buffer overflow vulnerability.

Recommended defensive actions

• Upgrade to version 2.48 of GNU Binutils
• Review and apply the patch (471130b39c03623ec6d78ece377ff4da3f6bfe7b) if upgrading is not feasible
• Monitor systems for potential 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 and NVD detail page provide information on the vulnerability, including its description, CVSS score, and affected versions. The exploit has been publicly disclosed, increasing the risk of exploitation. Defenders should verify if GNU Binutils 2.47 is used in their environment and prioritize upgrading to version 2.48. Additional information can be found in the official CVE Program record and NIST NVD detail page.

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.