CVE-2022-50417

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.

• linux linux kernel (>= 5.2 < 5.10.163) • linux linux kernel (>= 5.11 < 5.15.87) • linux linux kernel (>= 5.16 < 6.0.19) • linux linux kernel (>= 6.1 < 6.1.5) • linux linux kernel 6.2