CVE-2026-72089 accel/ivpu: Reject firmware log with size smaller than header
A missing size check in the Linux kernel IVPU driver allows integer underflow, leading to out-of-bounds reads and potential denial of service.
- 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-2026-72089?
CVE-2026-72089 is a high-severity 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:
accel/ivpu: Reject firmware log with size smaller than header
fw_log_from_bo() validates the tracing buffer header_size and that the log fits within the BO, but never checks that log->size is at least log->header_size. fw_log_print_buffer() then computes:
u32 data_size = log->size - log->header_size;
which underflows to a near-U32_MAX value when firmware reports a log whose size is smaller than its header. That huge data_size defeats the log_start/log_end bounds clamps added by commit dd1311bcf0e6 ("accel/ivpu: Add bounds checks for firmware log indices"), so fw_log_print_lines() reads far past the small real data region of the BO. A size of 0 also makes fw_log_from_bo() advance the offset by 0, causing the callers to loop forever on the same header.
Reject logs whose size is smaller than the header (which also rejects size == 0).
Which versions are affected by CVE-2026-72089?
How do I fix CVE-2026-72089?
Apply the vendor's patch.
Is CVE-2026-72089 being exploited?
There is no known exploitation of CVE-2026-72089 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-72089, DEBIAN-CVE-2026-72089, GHSA-f4rx-vf72-pg97, UBUNTU-CVE-2026-72089.