Out-of-bounds Read in GNU Binutils
CVE-2026-4647
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (5.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- GNU Binutils
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images — versions 2.45.1-5.1.hum1, 2.46.1-1.hum1
- Red Hat Openshift Container Platform 4
- Red Hat Enterprise Linux — versions 6.0, 7.0, 8.0
- Red Hat Openshift Container Platform — versions 4.0
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-4647 (Mitigation, vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking, Vendor Advisory)
- sourceware.org/bugzilla/show_bug.cgi (Broken Link)
- access.redhat.com/errata/RHSA-2026:33527 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:39022 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-4647?
- CVE-2026-4647 is a medium-severity vulnerability in GNU Binutils, classified under Out-of-bounds Read. CVSS score: 6.1/10. Published 2026-03-23.
- How severe is CVE-2026-4647?
- Medium severity. CVSS v3 base score is 6.1 out of 10.