CVE-2026-4647: Binutils: out-of-bounds read in xcoff relocation processing in gnu binutils bfd library

mediumCVSS 6.1CVE-2026-4647

CSIRTS triage

vendor: GNU product: Binutils Memory corruption

What: The binutils BFD library contains an out-of-bounds read during XCOFF relocation processing.
Who is affected: Systems using affected GNU Binutils versions for binary processing and linking.
Urgency: Medium severity (CVSS 6.1) with no exploitation reported; address in regular patching cycle.
Action: Update GNU Binutils to patched version addressing out-of-bounds read in XCOFF relocation processing.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 6.1
Published: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-4647

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-46470.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-4647	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[UPDATE] [medium] binutils: Vulnerability allows denial of servicecert-bund

Recent advisories for Binutils

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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