{"id":"DEBIAN-CVE-2026-98517","details":"In the Linux kernel, the following vulnerability has been resolved:  drm/nouveau/uvmm: fix UAF in nouveau_uvmm_sm when BO is in TTM_PL_SYSTEM  nouveau_uvmm_sm() calls op_map(), which passes bo-\u003eresource through nouveau_mem() to nouveau_uvma_map(). nouveau_uvmm_vmm_map() then reads mem-\u003emem.type.  But this is only valid when bo-\u003eresource is backed by struct nouveau_mem, as is the case for VRAM and TT resources. If the BO is left in TTM_PL_SYSTEM, bo-\u003eresource is only a struct ttm_resource. Treating it as struct nouveau_mem makes the mem-\u003emem.type read past the end of the resource, causing a KASAN: slab-use-after-free Read in nouveau_uvmm_sm report:  BUG: KASAN: slab-use-after-free in nouveau_uvmm_vmm_map drivers/gpu/drm/nouveau/nouveau_uvmm.c:152 [inline] BUG: KASAN: slab-use-after-free in nouveau_uvma_map drivers/gpu/drm/nouveau/nouveau_uvmm.c:199 [inline] BUG: KASAN: slab-use-after-free in op_map drivers/gpu/drm/nouveau/nouveau_uvmm.c:849 [inline] BUG: KASAN: slab-use-after-free in nouveau_uvmm_sm.constprop.0+0x6ab/0x900 drivers/gpu/drm/nouveau/nouveau_uvmm.c:903 Read of size 1 at addr ffff888127d3e3a0 by task kworker/0:1/11  CPU: 0 UID: 0 PID: 11 Comm: kworker/0:1 Not tainted 7.2.0 #5 PREEMPT(lazy) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: nouveau_sched_wq_2224 drm_sched_run_job_work Call Trace:  \u003cTASK\u003e  __dump_stack lib/dump_stack.c:94 [inline]  dump_stack_lvl+0x95/0xe0 lib/dump_stack.c:120  print_address_description mm/kasan/report.c:378 [inline]  print_report+0xcb/0x5a0 mm/kasan/report.c:482  kasan_report+0xca/0x100 mm/kasan/report.c:595  nouveau_uvmm_vmm_map drivers/gpu/drm/nouveau/nouveau_uvmm.c:152 [inline]  nouveau_uvma_map drivers/gpu/drm/nouveau/nouveau_uvmm.c:199 [inline]  op_map drivers/gpu/drm/nouveau/nouveau_uvmm.c:849 [inline]  nouveau_uvmm_sm.constprop.0+0x6ab/0x900 drivers/gpu/drm/nouveau/nouveau_uvmm.c:903  nouveau_uvmm_sm_unmap drivers/gpu/drm/nouveau/nouveau_uvmm.c:932 [inline]  nouveau_uvmm_bind_job_run+0xd6/0x250 drivers/gpu/drm/nouveau/nouveau_uvmm.c:1532  nouveau_job_run drivers/gpu/drm/nouveau/nouveau_sched.c:350 [inline]  nouveau_sched_run_job+0x62/0xd0 drivers/gpu/drm/nouveau/nouveau_sched.c:364  drm_sched_run_job_work+0x356/0xa10 drivers/gpu/drm/scheduler/sched_main.c:1061  process_one_work+0x8a5/0x1900 kernel/workqueue.c:3322  process_scheduled_works kernel/workqueue.c:3405 [inline]  worker_thread+0x5dd/0xd80 kernel/workqueue.c:3486  kthread+0x31d/0x420 kernel/kthread.c:436  ret_from_fork+0x662/0x940 arch/x86/kernel/process.c:158  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245  \u003c/TASK\u003e  Allocated by task 2224 on cpu 0 at 66.550027s:  kasan_save_stack+0x24/0x50 mm/kasan/common.c:57  kasan_save_track+0x17/0x60 mm/kasan/common.c:78  poison_kmalloc_redzone mm/kasan/common.c:398 [inline]  __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415  kasan_kmalloc include/linux/kasan.h:263 [inline]  __do_kmalloc_node mm/slub.c:5334 [inline]  __kmalloc_noprof+0x304/0x7c0 mm/slub.c:5359  _kmalloc_noprof include/linux/slab.h:992 [inline]  dma_resv_list_alloc+0x27/0x90 drivers/dma-buf/dma-resv.c:106  dma_resv_reserve_fences+0x60e/0xa30 drivers/dma-buf/dma-resv.c:205  ttm_bo_alloc_resource+0x12c/0xbd0 drivers/gpu/drm/ttm/ttm_bo.c:721  ttm_bo_validate+0x1bc/0x4a0 drivers/gpu/drm/ttm/ttm_bo.c:856  ttm_bo_init_reserved+0x2c3/0x570 drivers/gpu/drm/ttm/ttm_bo.c:970  nouveau_bo_init+0x159/0x2c0 drivers/gpu/drm/nouveau/nouveau_bo.c:359  nouveau_gem_new+0x234/0x5f0 drivers/gpu/drm/nouveau/nouveau_gem.c:272  nouveau_gem_ioctl_new+0x1eb/0x420 drivers/gpu/drm/nouveau/nouveau_gem.c:352  drm_ioctl_kernel+0x192/0x350 drivers/gpu/drm/drm_ioctl.c:817  drm_ioctl+0x4f8/0xb40 drivers/gpu/drm/drm_ioctl.c:914  nouveau_drm_ioctl+0xea/0x2c0 drivers/gpu/drm/nouveau/nouveau_drm.c:1338  vfs_ioctl fs/ioctl.c:51 [inline]  __do_sys_ioctl fs/ioctl.c:597 [inline]  __se_sys_ioctl fs/ioctl.c:583 [inline]  __x64_sys_ioctl+0x180/0x1d0 fs/ioctl.c:583  do_syscall_x64 ar ---truncated---","modified":"2026-10-19T05:00:11.653736668Z","published":"2026-10-18T17:47:36.711671159Z","upstream":["CVE-2026-98517"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-98517"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.113-1"}]}],"versions":["6.12.100-1","6.12.101-1","6.12.105-1","6.12.107-1","6.12.111-1","6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.85-1","6.12.85-1~bpo12+1","6.12.86-1","6.12.86-1~bpo12+1","6.12.88-1","6.12.88-1~bpo12+1","6.12.90-1","6.12.90-1~bpo12+1","6.12.90-2","6.12.90-2~bpo12+1","6.12.94-1","6.12.94-1~bpo12+1","6.12.95-1","6.12.95-1~bpo12+1","6.12.96-1"],"ecosystem_specific":{"urgency":"not 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