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Tracker / CVE-2022-50417

CVE-2022-50417

Alta 7.8

In the Linux kernel, the following vulnerability has been resolved: drm/panfrost: Fix GEM handle creation ref-counting panfrost_gem_create_with_handle() previously returned a BO but with the only reference being from the handle, which user space could in theory guess and release, causing a use-after-free. Additionally if the call to panfrost_gem_mapping_get() in panfrost_ioctl_create_bo() failed then a(nother) reference on the BO was dropped. The _create_with_handle() is a problematic pattern, so ditch it and instead create the handle in panfrost_ioctl_create_bo(). If the call to panfrost_gem_mapping_get() fails then this means that user space has indeed gone behind our back and freed the handle. In which case just return an error code.

Prodotti e versioni affette

linux linux_kernel
linux linux_kernel · 5.11 → 5.15.87
linux linux_kernel · 5.16 → 6.0.19
linux linux_kernel · 5.2 → 5.10.163
linux linux_kernel · 6.1 → 6.1.5

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