CVE-2026-89825
HighCVSS 7.8Summary
In the Linux kernel, panthor_init_cs_iface() and panthor_init_csg_iface() in the drm/panthor driver validate firmware control interface offsets using 32-bit arithmetic and the size of host wrapper structures, so the arithmetic can wrap before the bounds check and the checked size does not match the actual mapped firmware control interface.
Risk Assessment
This may lead to out-of-bounds access and potential kernel instability or data exposure.
Recommendation
Update the Linux kernel to a version with the fix using 64-bit arithmetic and subtraction-based bounds checks against the actual firmware control interface structure sizes.
Other vulnerabilities in Linux kernel (drm/panthor)
See all- CVE-2026-90409Unknown
In the Linux kernel, the drm/panthor driver does not verify that vm_bind mappings of user-exposed BOs avoid the region reserved for kernel BO mappings. This missing check can cause address space conflicts. The fix adds an overlap check and guards against 64-bit range overflow.
- CVE-2026-89826High
In the Linux kernel, panthor_fw_read_build_info() in the drm/panthor driver validates the metadata range using 32-bit addition (hdr.meta_start + hdr.meta_size), which can wrap and let an out-of-bounds range pass. It also reads the "git_sha: " prefix without checking metadata length, and meta_size == 0 can underflow the NULL terminator index.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: drm/panthor: fix firmware control interface bounds checks panthor_init_cs_iface() and panthor_init_csg_iface() validate firmware control interface offsets with 32-bit arithmetic and the size of the host wrapper structures. The offsets are derived from firmware-provided strides, so the arithmetic can wrap before the bounds check, and the host wrapper size is not the size of the firmware control interface being mapped. Use 64-bit arithmetic for the computed offsets and validate against the actual firmware control interface structure sizes with subtraction-based bounds checks. Also validate that the shared section is large enough for the global control interface before using it.