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Vulnerability record · CVE-2026-4647 · published 23 March 2026

CVE-2026-4647: Gnu binutils out-of-bounds read vulnerability

Gnu · Binutils

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.

6.1 CVSS 3.1 Medium EPSS 0.17% · top 94.6% CWE-125 · Out-of-bounds read
6.1CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
5References
1 Sep 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:33527
https://access.redhat.com/errata/RHSA-2026:39022
https://access.redhat.com/security/cve/CVE-2026-4647 MitigationVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2450302 Issue TrackingVendor Advisory
https://sourceware.org/bugzilla/show_bug.cgi?id=33919 Broken Link

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Source: NIST National Vulnerability Database (record CVE-2026-4647), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.