CVE-2026-89826

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux2718d91816eeed03c09c8abe872e45f59078768c < 5516f1acfd07564361cf306cc90a8e513df0f096affected
LinuxLinux2718d91816eeed03c09c8abe872e45f59078768c < 6ae19dce3e8c13ae73590b3f4311abe9f96bbae8affected
LinuxLinux2718d91816eeed03c09c8abe872e45f59078768c < 8321b093fa6c297b80586460ce6914d9655df170affected
LinuxLinux6.10affected
LinuxLinux0 < 6.10unaffected
LinuxLinux6.18.51 <= 6.18.*unaffected
LinuxLinux7.2.5 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References