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Arm Mali CSF VMA Split Mishandling

Arm Mali CSF VMA Split Mishandling
Posted Aug 25, 2022
Authored by Jann Horn, Google Security Research

In the Arm Mali driver's handling of CSF user I/O mappings, VMA splitting is handled incorrectly, leading to a page being given back to the kernel's page allocator while it is still mapped into userspace. On devices with recent Mali GPUs that support CSF, this is a security bug that should be very straightforward to exploit.

tags | exploit, kernel
advisories | CVE-2022-33917
SHA-256 | 6ee0db58337e2459a3e0a317b84488b6c9019397c42a860c2baea1a6661f8592
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