{"id":"DEBIAN-CVE-2026-43236","details":"In the Linux kernel, the following vulnerability has been resolved:  drm/atmel-hlcdc: fix use-after-free of drm_crtc_commit after release  The atmel_hlcdc_plane_atomic_duplicate_state() callback was copying the atmel_hlcdc_plane state structure without properly duplicating the drm_plane_state. In particular, state-\u003ecommit remained set to the old state commit, which can lead to a use-after-free in the next drm_atomic_commit() call.  Fix this by calling __drm_atomic_helper_duplicate_plane_state(), which correctly clones the base drm_plane_state (including the -\u003ecommit pointer).  It has been seen when closing and re-opening the device node while another DRM client (e.g. fbdev) is still attached:  ============================================================================= BUG kmalloc-64 (Not tainted): Poison overwritten -----------------------------------------------------------------------------  0xc611b344-0xc611b344 @offset=836. First byte 0x6a instead of 0x6b FIX kmalloc-64: Restoring Poison 0xc611b344-0xc611b344=0x6b Allocated in drm_atomic_helper_setup_commit+0x1e8/0x7bc age=178 cpu=0 pid=29  drm_atomic_helper_setup_commit+0x1e8/0x7bc  drm_atomic_helper_commit+0x3c/0x15c  drm_atomic_commit+0xc0/0xf4  drm_framebuffer_remove+0x4cc/0x5a8  drm_mode_rmfb_work_fn+0x6c/0x80  process_one_work+0x12c/0x2cc  worker_thread+0x2a8/0x400  kthread+0xc0/0xdc  ret_from_fork+0x14/0x28 Freed in drm_atomic_helper_commit_hw_done+0x100/0x150 age=8 cpu=0 pid=169  drm_atomic_helper_commit_hw_done+0x100/0x150  drm_atomic_helper_commit_tail+0x64/0x8c  commit_tail+0x168/0x18c  drm_atomic_helper_commit+0x138/0x15c  drm_atomic_commit+0xc0/0xf4  drm_atomic_helper_set_config+0x84/0xb8  drm_mode_setcrtc+0x32c/0x810  drm_ioctl+0x20c/0x488  sys_ioctl+0x14c/0xc20  ret_fast_syscall+0x0/0x54 Slab 0xef8bc360 objects=21 used=16 fp=0xc611b7c0 flags=0x200(workingset|zone=0) Object 0xc611b340 @offset=832 fp=0xc611b7c0","modified":"2026-09-01T16:05:13.657598320Z","published":"2026-05-06T12:16:43.817Z","upstream":["CVE-2026-43236"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-43236"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.170-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.135-1","6.1.137-1","6.1.139-1","6.1.140-1","6.1.147-1","6.1.148-1","6.1.153-1","6.1.158-1","6.1.159-1","6.1.162-1","6.1.164-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not 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