CVE-2026-64097 Linux CVE debrief

Who should care

Linux kernel users, maintainers, and security teams should be aware of this vulnerability and take necessary actions to protect their systems. Affected operators and platforms should review their deployments and configurations to ensure they are not exposed to this vulnerability. Vulnerability management and security teams should prioritize patching or mitigating this vulnerability.

Technical summary

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. This issue has been resolved 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.

Defensive priority

High

Recommended defensive actions

• Validate GPIO pin LUT table size before iterating
• Use bios_get_image() to validate that the full claimed structuresize is accessible within the BIOS image
• Review and update Linux kernel configurations to ensure secure settings
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-19T16:17:50.727Z and has not been modified since then. The NVD entry is currently Received. Linux kernel users should verify their deployments and configurations to ensure they are not affected by this vulnerability. The GPIO pin LUT table size validation issue in the drm/amd/display component has been resolved, but users should confirm whether their systems are exposed and review official advisories for guidance.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.