CVE-2026-89826

Published: September 18, 2026Last modified: September 18, 2026

Description

In the Linux kernel, the following vulnerability has been resolved: drm/panthor: harden firmware build-info bounds checks panthor_fw_read_build_info() checks whether the metadata range fits in the firmware image with hdr.meta_start + hdr.meta_size. Both fields are u32, so the addition can wrap and let an out-of-bounds range pass validation. The function also reads the "git_sha: " prefix without first checking that the metadata is long enough, and meta_size == 0 can underflow the NULL terminator index. Use subtraction-based bounds checking and reject metadata that is too short to contain the expected prefix and trailing NULL byte.

Severity score breakdown

Status

References

• https://git.kernel.org/stable/c/5516f1acfd07564361cf306cc90a8e513df0f096
• https://git.kernel.org/stable/c/6ae19dce3e8c13ae73590b3f4311abe9f96bbae8
• https://git.kernel.org/stable/c/8321b093fa6c297b80586460ce6914d9655df170