CVE-2026-97600 ieee802154: cc2520: fix FIFOP work use-after-free
A use-after-free in the Linux kernel cc2520 driver allows attackers to cause denial of service or execute code via race conditions during device removal.
- 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-2026-97600?
CVE-2026-97600 is an use after free vulnerability in Linux, published on 25 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:
ieee802154: cc2520: fix FIFOP work use-after-free
The FIFOP interrupt handler queues cc2520_fifop_irqwork. On removal, cc2520_remove() only flushes the work. The devm-managed FIFOP IRQ remains active until after ->remove() returns and can queue the work again after that flush, allowing it to run after the private data is released.
Disable the work with disable_work_sync() instead of flushing it, so the handler can no longer queue it once removal begins. Destroy the buffer mutex last, since the worker and the stop callback invoked through ieee802154_unregister_hw() both take it.
Found by an in-house static analysis tool.
Which versions are affected by CVE-2026-97600?
How do I fix CVE-2026-97600?
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-2026-97600 being exploited?
There is no known exploitation of CVE-2026-97600 in the wild and no public exploit code.
Sources
Also known as AZL-104630, BELL-CVE-2026-97600, DEBIAN-CVE-2026-97600, GHSA-rq9h-jcg5-92gp, UBUNTU-CVE-2026-97600.