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.
CVE-2026-4647
MEDIUMNVD 6.16.1—Trending — 5 sources updated this week
EchelonGraph scoreMEDIUM confidence
Score 6.1 from GitHub Security Advisory published 2026-03-23. NVD baseline CVSS 6.1; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, nvd
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.1Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.1
- EG Score
- 6.1(medium)
- EPSS
- 6.4%
- KEV
- Not listed
Published
March 23, 2026
Last Modified
June 30, 2026
Advisory Details (3)
Auto-updated Jun 30, 2026Patch available. Sources: redhat.
generic
33919 – Out-of-bounds read in XCOFF relocation processing (coff-rs6000.c, coff64-rs6000.c)
https://sourceware.org/bugzilla/show_bug.cgi?id=33919redhat Patch Available
2450302 – (CVE-2026-4647) CVE-2026-4647 binutils: Out-of-Bounds Read in XCOFF Relocation Processing in GNU Binutils BFD Library
https://bugzilla.redhat.com/show_bug.cgi?id=2450302Vendor Advisories for CVE-2026-4647(3)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:33527Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
- CVE-2026-4647Microsoft Security Response Center (MSRC)Medium
Binutils: out-of-bounds read in xcoff relocation processing in gnu binutils bfd library
- GHSA-v858-p3pc-hqjhGitHub Security AdvisoriesMedium
A flaw was found in the GNU Binutils BFD library, a widely used component for handling binary...
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 10× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-06 16:27 UTCEPSS rescore
- 2026-07-06 02:23 UTCEPSS rescore
- 2026-07-05 02:30 UTCEPSS rescore
- 2026-07-04 06:31 UTCEPSS rescore
- 2026-07-01 15:07 UTCEPSS rescore
- 2026-06-30 23:22 UTCEPSS rescore
- 2026-06-30 12:33 UTCEG score recompute
- 2026-06-30 12:33 UTCVendor advisory
- 2026-06-30 12:33 UTCGHSA enrichment
- 2026-06-30 12:32 UTCNVD updatefirst tracked
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Same vendor
10 shownmsrc
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- CVE-2015-20107NVD 7.6EG 9.8EPSS 93%HIGH
- CVE-2013-7381EG 9.8CRITICAL
- CVE-2014-0048EG 9.8EPSS 93%CRITICAL
- CVE-2007-4559EG 9.8EPSS 98%CRITICAL
- CVE-2013-3900NVD 5.5EG 9.0 KEVEPSS 99%MEDIUM
- CVE-2013-2094NVD 8.4EG 9.0 KEVEPSS 99%HIGH
- CVE-2014-9356EG 8.6EPSS 91%HIGH
- CVE-2014-5282EG 8.1HIGH
- CVE-2014-8141EG 7.8EPSS 94%HIGH
Same CWE
10 shownCWE-125
- CVE-2014-2898EG 9.8CRITICAL
- CVE-2014-2897EG 9.8CRITICAL
- CVE-2014-2896EG 9.8CRITICAL
- CVE-2015-9290EG 9.8CRITICAL
- CVE-2016-10749EG 9.8CRITICAL
- CVE-1999-0006EG 9.8EPSS 96%CRITICAL
- CVE-2014-3180EG 9.1CRITICAL
- CVE-2014-1508EG 9.1EPSS 90%CRITICAL
- CVE-2016-5198NVD 8.8EG 9.0 KEVEPSS 98%HIGH
- CVE-2016-4523NVD 7.5EG 9.0 KEVEPSS 98%HIGH
Frequently asked(5)
What is CVE-2026-4647?
CVE-2026-4647 is a medium vulnerability published on March 23, 2026. 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…
When was CVE-2026-4647 disclosed?
CVE-2026-4647 was first published in the National Vulnerability Database on March 23, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-4647 actively exploited?
CVE-2026-4647 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-4647?
CVE-2026-4647 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-4647?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-4647, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-4647
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