CVE-2026-23013 net: octeon_ep_vf: fix free_irq dev_id mismatch in IRQ rollback
A use-after-free vulnerability in the Linux kernel's octeon_ep_vf driver allows attackers to cause a crash or potentially execute code via improper IRQ rollback handling.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-23013?
CVE-2026-23013 is a high-severity use after free vulnerability in Linux kernel, published on 25 Jan 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:
net: octeon_ep_vf: fix free_irq dev_id mismatch in IRQ rollback
octep_vf_request_irqs() requests MSI-X queue IRQs with dev_id set to ioq_vector. If request_irq() fails part-way, the rollback loop calls free_irq() with dev_id set to 'oct', which does not match the original dev_id and may leave the irqaction registered.
This can keep IRQ handlers alive while ioq_vector is later freed during unwind/teardown, leading to a use-after-free or crash when an interrupt fires.
Fix the error path to free IRQs with the same ioq_vector dev_id used during request_irq().
Weakness: CWE-416
Which versions are affected by CVE-2026-23013?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-23013?
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-2026-23013 being exploited?
There is no known exploitation of CVE-2026-23013 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-23013, DEBIAN-CVE-2026-23013, GHSA-r5qx-544g-4q99, ROOT-OS-DEBIAN-13-CVE-2026-23013, UBUNTU-CVE-2026-23013.