What is CVE-2026-90803?

CVE-2026-90803 is a medium-severity vulnerability in GNU Binutils, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-09-14.

How severe is CVE-2026-90803?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Buffer overflow in GNU Binutils

CVE-2026-90803

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.

Vulnerability class: Buffer Overflow

Published 2026-09-14 · last modified 2026-09-18.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.002 (10.0th percentile), scored 2026-10-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 10.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

GNU Binutils — versions 2.47

Weakness classification (CWE)

References

vuldb.com/vuln/403305 (Permissions Required, technical-description, VDB Entry, Third Party Advisory, vdb-entry)
vuldb.com/vuln/403305/cti (signature, Permissions Required, permissions-required, VDB Entry, Third Party Advisory)
vuldb.com/cve/CVE-2026-90803 (Permissions Required, VDB Entry, Third Party Advisory, third-party-advisory)
vuldb.com/submit/920280 (Permissions Required, VDB Entry, Third Party Advisory, third-party-advisory)
sourceware.org/bugzilla/show_bug.cgi (issue-tracking, Exploit, Third Party Advisory)
github.com/r1ck9-2q/cve_summit/blob/main/Heap OOB readwrite and SEGV in `elf_x8… (Exploit, Third Party Advisory, exploit, Mitigation)
sourceware.org/git/gitweb.cgi (Patch, patch)
www.gnu.org/ (Product, product, broken-link)

Frequently asked questions

What is CVE-2026-90803?: CVE-2026-90803 is a medium-severity vulnerability in GNU Binutils, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-09-14.
How severe is CVE-2026-90803?: Medium severity. CVSS v3 base score is 5.3 out of 10.