CVE-2026-72384 irqchip/ts4800: Fix missing chained handler cleanup on remove
A missing cleanup in the ts4800 irqchip driver allows a use-after-free condition, potentially causing kernel crashes or code execution upon driver removal.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72384?
CVE-2026-72384 is an use after free vulnerability in Linux, published on 15 Aug 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:
irqchip/ts4800: Fix missing chained handler cleanup on remove
The driver installs a chained handler for the parent interrupt during probe using irq_set_chained_handler_and_data(), but the remove function does not clear this handler. This leaves a dangling handler that may be called when the parent interrupt fires after the driver has been removed, potentially accessing freed memory and causing a kernel crash.
Additionally, the parent_irq obtained via irq_of_parse_and_map() is not stored, making it inaccessible in the remove function. Moreover, interrupt mappings created during probe are not properly disposed.
Fix this by:
- Saving parent_irq in probe - Clearing the chained handler with NULL in ts4800_ic_remove() - Disposing all IRQ mappings before domain removal to prevent resource leaks
Which versions are affected by CVE-2026-72384?
How do I fix CVE-2026-72384?
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-2026-72384 being exploited?
There is no known exploitation of CVE-2026-72384 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-72384, DEBIAN-CVE-2026-72384, GHSA-xcpr-v9rp-m43f, UBUNTU-CVE-2026-72384.