CVE-2026-92486 bpf: Fix CFI mismatch in task work callback
A Control Flow Integrity mismatch in the Linux kernel BPF subsystem can cause a crash when task work callbacks are invoked.
- 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-2026-92486?
CVE-2026-92486 is a vulnerability in Linux, published on 17 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:
bpf: Fix CFI mismatch in task work callback
BPF subprograms use the bpf_callback_t ABI, but task work invokes the callback through a three-argument function pointer. This trips kCFI.
Store and invoke the callback as bpf_callback_t.
Which versions are affected by CVE-2026-92486?
How do I fix CVE-2026-92486?
Apply the vendor's patch.
Is CVE-2026-92486 being exploited?
There is no known exploitation of CVE-2026-92486 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-92486, DEBIAN-CVE-2026-92486, GHSA-vh7j-gj65-xh7c, UBUNTU-CVE-2026-92486.