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CVE-2026-15003 Red Hat CVE debrief

A flaw was found in the GNU Binutils linker. This vulnerability, a heap-buffer-overflow read (CWE-125), occurs when the linker processes a specially crafted 32-bit XCOFF 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.

Vendor
Red Hat
Product
Red Hat Enterprise Linux 10
CVSS
MEDIUM 5.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-27
Original CVE updated
2026-09-01
Advisory published
2026-07-27
Advisory updated
2026-09-01

Who should care

Users of GNU Binutils, especially those processing object files from untrusted sources, should be aware of this vulnerability. This includes developers, system administrators, and users of software that relies on GNU Binutils for linking.

Technical summary

The vulnerability is a heap-buffer-overflow read (CWE-125) in the GNU Binutils linker. It occurs when the linker processes a specially crafted 32-bit XCOFF object file, leading to an out-of-bounds read of memory. This can result in information disclosure and a Denial of Service (DoS). Affected systems include those using GNU Binutils for linking, particularly in environments processing object files from untrusted sources. The impact includes potential exposure of sensitive heap data and system crashes. Defensive measures should focus on validating input object files and applying memory protection mechanisms.

Defensive priority

Medium priority due to the potential for information disclosure and DoS.

Recommended defensive actions

  • Inventory and assess GNU Binutils usage, especially in environments processing object files from untrusted sources.
  • Apply patches or updates provided by the vendor as soon as available.
  • Implement compensating controls such as memory protection mechanisms.
  • Monitor for suspicious activity related to GNU Binutils.
  • Consider using alternative tools or sandboxed environments for processing untrusted object files.

Evidence notes

The CVE record was published on 2026-07-27T14:16:51.473Z and was last modified on 2026-07-27T20:37:16.927Z. The NVD entry is currently Awaiting Analysis. References include Red Hat security advisories and sourceware bug reports.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-15003 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-15003

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-15003 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-15003

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.