CVE-2026-87676 Memory corruption in Fabric OS
An authenticated administrator can cause a denial of service by uploading a crafted X.509 certificate with an oversized Authority Key Identifier extension.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-87676?
CVE-2026-87676 is a medium-severity memory corruption vulnerability in Broadcom Fabric Operating System, published on 8 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A stack-based buffer overflow vulnerability exists in the security library component of Brocade Fabric OS versions before 10.0.1. When parsing uploaded X.509 PEM certificates for management display, the system improperly validates the length of the Authority Key Identifier (AKI) extension before copying string tokens into an internal memory buffer. An authenticated user with administrative privileges to import custom certificates can supply a certificate containing an intentionally oversized AKI extension. When the system processes or renders the certificate attributes, this can trigger a stack memory corruption leading to a denial-of-service (DoS) condition by crashing the management daemon.
Weakness: CWE-121
Which versions are affected by CVE-2026-87676?
It affects 1 product.
Products include Broadcom Fabric Operating System.
How do I fix CVE-2026-87676?
No fix has been published for CVE-2026-87676 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-87676 being exploited?
There is no known exploitation of CVE-2026-87676 in the wild and no public exploit code.
Other vulnerabilities in Broadcom Fabric Operating System
Sources
Also known as GHSA-rphp-9f89-9xvx.