Cloudanix VulnDB

CVE-2026-15003

Medium · 5.6

CVSS

5.6

EPSS

0.2%

Published

Jul 27, 2026

CISA due date

—

Cloudanix analysis

Monitor only SSVC: Track

A common programming tool can crash or accidentally reveal some internal data when it tries to combine certain specially made files.

Exploitation
Requires User Interaction
Attacker needs
Local User
Complexity
Low
Impact
Data Exposure
Component
Application
Class
Buffer Overflow
Remediation
Upgrade
Effort
Medium
Patch risk
Low

What it actually does

Heap buffer over-read (CWE-125) in the GNU Binutils linker when parsing specially crafted 32-bit XCOFF object files, resulting in out-of-bounds memory access that can disclose heap contents or cause a crash.

Why it matters to the business

Build and compilation pipelines that ingest untrusted object files may experience linker crashes that halt development workflows, with a secondary risk of sensitive memory data exposure in affected environments; low urgency given stable low exploit probability and absence from known campaigns.

How an attack unfolds

An attacker supplies a malicious 32-bit XCOFF file to the linker; during parsing the flawed code performs an out-of-bounds read, either crashing the process or leaking heap data. No named threat actors or ransomware usage are associated with this issue.

How to fix it

Upgrade binutils-main (redhat) to the fixed version 2.46.1-1.1.hum1 as provided in RHSA-2026:47171. Until patched, avoid linking untrusted 32-bit XCOFF files.

How to confirm the fix worked

Confirm the installed binutils version meets or exceeds 2.46.1-1.1.hum1; re-test build pipelines with representative XCOFF inputs to verify absence of crashes; review package manifests for the RHSA advisory.

Typical attack path

  1. Craft a malformed 32-bit XCOFF object file that triggers the buffer over-read path
  2. Invoke the linker (ld) against the supplied file in a build or analysis workflow
  3. Trigger the out-of-bounds read during symbol or section processing
  4. Observe process crash or capture disclosed heap memory

How to detect it

Inspect build-system and linker logs for segmentation faults or abnormal exits when XCOFF files are processed; correlate crashes with recent introduction of new object files; no known in-the-wild exploitation artifacts exist.

What your security team should do

  • Apply the RHSA-2026:47171 update to all build and CI systems using binutils
  • Add policy controls that block or sandbox processing of externally supplied object files until patched
  • Monitor build logs for unexplained linker crashes on XCOFF inputs

The record

A flaw was found in the GNU Binutils (Binary Utilities) linker. This vulnerability, a heap-buffer-overflow read (CWE-125), occurs when the linker processes a specially crafted 32-bit XCOFF (Extended Common Object File Format) object file. An attacker could exploit this by providing a malicious file, leading to an out-of-bounds read of memory. This can result in information disclosure, potentially revealing sensitive heap data, and a Denial of Service (DoS) due to the linker crashing.

Affected packages

Ecosystem Package Introduced Fixed

Related vulnerabilities