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CVE-2026-15003 medium CVSS 5.6

Out-of-Bounds Read in GNU Binutils (Binary Utilities) linker (CVE-2026-15003)

Summary

Vulnerability in GNU Binutils (Binary Utilities) linker (CVE-2026-15003). Risk of unauthorized operations or information disclosure.

Original description

The description as published by the source.

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.

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-15003 has been found in GNU Binutils (Binary Utilities) linker.
Risk of unauthorized operations or information disclosure. CVSS score: 5.6/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "GNU Binutils (Binary Utilities) linker CVE-2026-15003" on the vendor's site.

CVE-2026-15003 (GNU Binutils (Binary Utilities) linker) — CWE-125 / CVSS v3 5.6
Attack vector: local
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

Out-of-bounds read (CWE-125) exists in GNU Binutils (Binary Utilities) linker.

📍 Affected scope

Check the vendor advisory for the affected versions of GNU Binutils (Binary Utilities) linker.

🔥 Severity

Severity: Medium (CVSS 5.6/10). Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to the patched release per vendor advisory.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで GNU Binutils (Binary Utilities) linker を使っているサービスとバージョンを洗い出す。

  2. 2
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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