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CVE-2026-4647

binutils: Out-of-Bounds Read in XCOFF Relocation Processing in GNU Binutils BFD Library

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Severity

Moderate

Red Hat Product Security

6.1

CVSS 3.1

Review impact separately from score.

Published · March 23, 2026

Updated · November 4, 2026

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.

Statement

This is a MODERATE impact vulnerability. The flaw in GNU Binutils BFD library occurs when processing specially crafted XCOFF object files, leading to out-of-bounds memory access. This could result in application crashes or information disclosure. Exploitation requires an attacker to provide a malicious XCOFF file to a vulnerable application.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

CVSS / CWE

CVSS 3.1 · 6.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

CWE-125 · Out-of-bounds Read