Threats tagged 'ghsa-hc4x-fm75-q3wc'

A vulnerability in the Linux kernel's drm/shmem-helper subsystem allows a local user with write permissions to a file descriptor to trigger a kernel panic. This occurs due to a missing check for copy-on-write (COW) mappings in drm_gem_shmem_mmap, which leads to a BUG_ON condition when mmap is called with PROT_WRITE and MAP_PRIVATE flags. The issue affects all DRM drivers using the default shmem helpers.