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CVE-2026-74451: drm/panthor: validate firmware interface structure sizes

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: drm/panthor: validate firmware interface structure sizes iface_fw_to_cpu_addr() only checks that the firmware-provided MCU virtual address points inside the shared section. The returned pointer is later used as a full firmware interface structure, so accepting an address near the end of the shared section can still lead to out-of-bounds accesses. Pass the expected object size to iface_fw_to_cpu_addr() and reject ranges that do not fit entirely in the shared section.

Affected products

• Linux kernel: 6.10 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/21c77486f5a60bb9c0433c21de62a5f25d5091f1
• https://git.kernel.org/stable/c/b921b8613790a3f9e78ab64017fa7149ef0b750c
• https://git.kernel.org/stable/c/c835f2b0b7167584832b516c9b0a26e9180d1d0b
• https://git.kernel.org/stable/c/ca41d9f3a21586bf29df53eec05152ecf2b2f94f

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