Out-of-bounds Read in Gnu Binutils

CVE-2026-4647

A flaw was found in the GNU Binutils BFD library, a widely used component for handling binary files such as object files and executables. The issue occurs when processing specially crafted XCOFF object files, where a relocation type value is not properly validated before being used. This can cause the program to read memory outside of intended bounds. As a result, affected tools may crash or expose unintended memory contents, leading to denial-of-service or limited information disclosure risks.

Vulnerability class: Buffer Overflow

EPSS: 0.002 (6.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-4647?
CVE-2026-4647 is a medium-severity vulnerability in Gnu Binutils, classified under Out-of-bounds Read. CVSS score: 6.1/10. Published 2026-03-23.
How severe is CVE-2026-4647?
Medium severity. CVSS v3 base score is 6.1 out of 10.