CVE-2026-72089
HighCVSS 7.1Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
In the Linux kernel accel/ivpu driver, fw_log_from_bo() does not check that the log size is at least the header size. When the log is smaller, fw_log_print_buffer() computes data_size with an underflow, leading to reads far past the small real data region of the BO. A size of 0 also causes infinite looping. The fix rejects logs whose size is smaller than the header.
Risk Assessment
Firmware can supply a malformed log, leading to out-of-bounds reads and potential kernel crash or information leak.
Recommendation
Apply the Linux kernel update containing the fix for CVE-2026-72089.
Original NVD description (English source)
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).