CVE-2026-72089

/// Technical 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).

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References