CVE-2026-90803 GNU Binutils ld elf64-x86-64.c elf_x86_64_relocate_section buffer overflow

Medium 4.8 Published 14 Sep 2026 Updated 14 Sep 2026

A buffer overflow in the GNU Binutils linker allows local attackers to execute arbitrary code or cause a denial of service via crafted ELF files.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2026-90803?

CVE-2026-90803 is a medium-severity memory corruption vulnerability in Gnu Binutils, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A security vulnerability has been detected in GNU Binutils 2.47. Affected by this vulnerability is the function elf_x86_64_relocate_section of the file bfd/elf64-x86-64.c of the component ld. Such manipulation of the argument roff leads to buffer overflow. An attack has to be approached locally. The exploit has been disclosed publicly and may be used. Upgrading to version 2.48 addresses this issue. The name of the patch is 471130b39c03623ec6d78ece377ff4da3f6bfe7b. It is recommended to upgrade the affected component.

Weakness: CWE-120, CWE-119

Which versions are affected by CVE-2026-90803?

It affects 1 product.

Products include Gnu Binutils.

How do I fix CVE-2026-90803?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-90803 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90803 exists.

All Gnu Binutils vulnerabilities

Sources

Also known as DEBIAN-CVE-2026-90803, ECHO-392a-f089-3bab, GHSA-fw55-q7rw-84f9, UBUNTU-CVE-2026-90803.