CVE-2026-15003 Binutils: gnu binutils: heap-buffer-overflow in linker leads to information disclosure and denial of service
A heap-buffer-overflow in the GNU Binutils linker allows attackers to disclose sensitive memory or cause a crash via crafted XCOFF files.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-15003?
CVE-2026-15003 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 27 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-125
Which versions are affected by CVE-2026-15003?
How do I fix CVE-2026-15003?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-15003 being exploited?
There is no known exploitation of CVE-2026-15003 in the wild and no public exploit code.
Sources
Also known as AZL-94187, AZL-94211, DEBIAN-CVE-2026-15003, ECHO-a285-b836-7fdb, GHSA-3mxj-5hq2-2h4f, OESA-2026-3255 and 5 more.