In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Validate...
🔗 CVE IDs covered (1)
📋 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)
🔗 References (8)
- https://nvd.nist.gov/vuln/detail/CVE-2026-64097
- https://git.kernel.org/stable/c/67461e0c15335894cc5d3b84cda823bf8cbdc886
- https://git.kernel.org/stable/c/7ca695b3122297b06a3ed605bbe1cd32c85d9f5a
- https://git.kernel.org/stable/c/86d2b20644b11d21fe52c596e6e922b4590a3e3f
- https://git.kernel.org/stable/c/9900f6954be779011e7c2cd42addd87baf028bc5
- https://git.kernel.org/stable/c/f2a4827e980ba07de4391fa84d9c39a12726bdd7
- https://git.kernel.org/stable/c/fb30a3890d62fd50a95aef684faf64a307592e42
- https://github.com/advisories/GHSA-78vx-v25w-4237