Medium [CVE-2026-15003] Heap-buffer-overflow in linker leads to information disclosure and denial of service
This medium-severity Red Hat Linux advisory covers CVE-2026-15003 affecting Red Hat Hardened Images, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6.
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Summary
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.
This vulnerability is rated as High. A heap-buffer-overflow in the GNU Binutils linker (`ld`) can lead to information disclosure and denial of service when processing specially crafted 32-bit XCOFF object files.
This occurs because the linker uses an unvalidated field from untrusted input as an array index, potentially exposing heap metadata or causing a crash during the linking process. Red Hat severity: Moderate — CVSS 5.6 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:H).
Weakness: CWE-125. Affected Red Hat products: Red Hat Hardened Images; 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 OpenShift Container Platform 4.
Red Hat fixing advisory: RHSA-2026:47171.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 28 days ago·verify at source
- binutils-main-2.46.1-1.1.hum1
- RHSA-2026:47171
Official advisory · high-confidence parse· fetched 28 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 28 days ago·verify at source
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