---
id: CVE-2026-89826
title: |-
  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 + h…
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 + h…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 2718d91816eeed03c09c8abe872e45f59078768c <
    5516f1acfd07564361cf306cc90a8e513df0f096
  - >-
    Linux >= 2718d91816eeed03c09c8abe872e45f59078768c <
    6ae19dce3e8c13ae73590b3f4311abe9f96bbae8
  - >-
    Linux >= 2718d91816eeed03c09c8abe872e45f59078768c <
    8321b093fa6c297b80586460ce6914d9655df170
  - Linux 6.10
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T15:18:11.553'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89826'
references:
  - url: 'https://git.kernel.org/stable/c/5516f1acfd07564361cf306cc90a8e513df0f096'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6ae19dce3e8c13ae73590b3f4311abe9f96bbae8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8321b093fa6c297b80586460ce6914d9655df170'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:54.002Z'
epss: 0.00164
epssPercentile: 0.04932
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.