CVE-2026-89582 bnx2x: fix double free in bnx2x_init_firmware() error path
A double free vulnerability in the bnx2x network driver allows local attackers to cause a denial of service or potentially execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-89582?
CVE-2026-89582 is an use after free vulnerability in Linux, published on 11 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
bnx2x: fix double free in bnx2x_init_firmware() error path
bnx2x_init_firmware() frees bp->init_ops, bp->init_data and bp->init_ops_offsets in its error path without setting them to NULL. The cleanup function bnx2x_release_firmware() frees the same three pointers unconditionally, so if init_firmware fails and release_firmware is later called (e.g. from __bnx2x_remove or through the function state machine), all three are freed a second time.
Set each pointer to NULL after kfree() in the error path so that the subsequent kfree(NULL) in bnx2x_release_firmware() is a safe no-op.
Which versions are affected by CVE-2026-89582?
How do I fix CVE-2026-89582?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-89582 being exploited?
There is no known exploitation of CVE-2026-89582 in the wild and no public exploit code.
Sources
Also known as AZL-100712, BELL-CVE-2026-89582, DEBIAN-CVE-2026-89582, GHSA-gw39-5689-xrvh, UBUNTU-CVE-2026-89582.