{"schema":"threatline.record/2","record":{"id":"CVE-2026-98511","aliases":[],"summary":"drm/nouveau: don't bump pin count on failed re-pin in nouveau_bo_pin_locked()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau: don't bump pin count on failed re-pin in nouveau_bo_pin_locked()\n\nnouveau_bo_pin_locked() checks whether an already pinned BO is in a\nmemory domain compatible with a new pin request. When the domains are\nincompatible, it sets -EBUSY but still calls ttm_bo_pin() before\nreturning.\n\nCallers treat a failed nouveau_bo_pin() as not having acquired a new pin,\nso the extra pin count is never decreased by a matching unpin.\nThis triggers the warning in ttm_bo_release():\n\n\tWARN_ON_ONCE(bo->pin_count);\n\nFound when fuzzing the nouveau driver with a modified Syzkaller:\n\n\tWARNING: drivers/gpu/drm/ttm/ttm_bo.c:256 at ttm_bo_release+0x827/0x9e0 drivers/gpu/drm/ttm/ttm_bo.c:256, CPU#1: syz.3.24/2212\n\tModules linked in:\n\tCPU: 1 UID: 0 PID: 2212 Comm: syz.3.24 Not tainted 7.2.0 #24 PREEMPT(lazy)\n\tnouveau 0000:01:00.0: gsp:msg fn:103 len:0x40/0x20 res:0x19 resp:0x19\n\tHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n\tRIP: 0010:ttm_bo_release+0x827/0x9e0 drivers/gpu/drm/ttm/ttm_bo.c:256\n\tCode: 02 00 0f 85 51 01 00 00 48 8b 7b 08 e8 d2 20 01 00 e9 80 fd ff ff e8 d8 15 c0 fe 90 0f 0b 90 e9 e1 f8 ff ff e8 ca 15 c0 fe 90 <0f> 0b 90 e9 a4 f8 ff ff e8 bc 15 c0 fe be 03 00 00 00 4c 89 e7 e8\n\tmsg: 00000000: 05 00 d0 c1 04 00 f0 f1 01 30 00 00 2d 90 00 00  .........0..-...\n\tRSP: 0018:ffffc9000f5cf710 EFLAGS: 00010293\n\tRAX: 0000000000000000 RBX: ffff888018e5d2a8 RCX: ffffffff82bb1b36\n\tRDX: ffff888017b68000 RSI: 0000000000000004 RDI: ffff888018e5d2a8\n\tmsg: 00000010: 19 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n\tRBP: ffff88801261c720 R08: 0000000000000001 R09: ffffed10031cba55\n\tR10: ffff888018e5d2ab R11: 00000000000000f3 R12: ffff888018e5d290\n\tR13: ffff888018e5d2d4 R14: ffff88801b219c18 R15: dffffc0000000000\n\tFS:  0000000000000000(0000) GS:ffff8880e0f6f000(0000) knlGS:0000000000000000\n\tCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n\tCR2: 0000001b31223ffc CR3: 0000000028e00005 CR4: 0000000000770ef0\n\tPKRU: 80000000\n\tCall Trace:\n\t<TASK>\n\tkref_put include/linux/kref.h:65 [inline]\n\tttm_bo_put drivers/gpu/drm/ttm/ttm_bo.c:325 [inline]\n\tttm_bo_fini+0x55/0x80 drivers/gpu/drm/ttm/ttm_bo.c:330\n\tnouveau_gem_object_del+0xb2/0x1b0 drivers/gpu/drm/nouveau/nouveau_gem.c:90\n\tdrm_gem_object_free+0x5f/0x90 drivers/gpu/drm/drm_gem.c:1165\n\tkref_put include/linux/kref.h:65 [inline]\n\t__drm_gem_object_put include/drm/drm_gem.h:562 [inline]\n\tdrm_gem_object_put include/drm/drm_gem.h:575 [inline]\n\tnouveau_abi16_chan_fini.constprop.0+0x44f/0x5a0 drivers/gpu/drm/nouveau/nouveau_abi16.c:195\n\tnouveau 0000:01:00.0: syz.2.23[2209]: Unknown handle 0x00000000\n\tnouveau_abi16_fini+0x1d0/0x340 drivers/gpu/drm/nouveau/nouveau_abi16.c:225\n\tnouveau_drm_postclose+0x18b/0x3e0 drivers/gpu/drm/nouveau/nouveau_drm.c:1284\n\tnouveau 0000:01:00.0: syz.2.23[2209]: validate_init\n\tdrm_file_free.part.0+0x6d6/0xb60 drivers/gpu/drm/drm_file.c:267\n\tdrm_file_free drivers/gpu/drm/drm_file.c:237 [inline]\n\tdrm_close_helper.isra.0+0x11a/0x160 drivers/gpu/drm/drm_file.c:290\n\tdrm_release+0x1ab/0x330 drivers/gpu/drm/drm_file.c:438\n\t__fput+0x39c/0xa60 fs/file_table.c:512\n\tnouveau 0000:01:00.0: syz.2.23[2209]: validate: -2\n\ttask_work_run+0x15a/0x230 kernel/task_work.c:233\n\texit_task_work include/linux/task_work.h:40 [inline]\n\tdo_exit+0x82b/0x25a0 kernel/exit.c:1009\n\tdo_group_exit+0xc2/0x280 kernel/exit.c:1152\n\tget_signal+0x1d6e/0x1f30 kernel/signal.c:3046\n\tarch_do_signal_or_restart+0x7d/0x6e0 arch/x86/kernel/signal.c:337\n\t__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]\n\texit_to_user_mode_loop+0xdf/0x440 kernel/entry/common.c:101\n\t__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]\n\tsyscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]\n\tsyscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]\n\tdo_syscall_64+0x4f8/0x690 arch/x86/entry/syscall_64.c:100\n\tentry_SYSCALL_64_after_hwframe+0x77/0x7f\n\tRI\n---truncated---","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98511","source_modified_at":"2026-10-19T09:20:50.368Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"ad76b3f7c7a0836e74ac0e316e03988ef3c43564","lessThan":"a6e755acf85793a7b4d29ba27b5421af1087263f","status":"affected","versionType":"git"},{"version":"ad76b3f7c7a0836e74ac0e316e03988ef3c43564","lessThan":"5cb7109f0f5f1b47b172e2d5b868d4ce3ae687f8","status":"affected","versionType":"git"},{"version":"ad76b3f7c7a0836e74ac0e316e03988ef3c43564","lessThan":"9924c1d64405be8d10b906368dfb1cfe0d0c6bf0","status":"affected","versionType":"git"},{"version":"ad76b3f7c7a0836e74ac0e316e03988ef3c43564","lessThan":"73c7093e6cc1e6b181a79e16eccc4b8d4f34d8ee","status":"affected","versionType":"git"},{"version":"ad76b3f7c7a0836e74ac0e316e03988ef3c43564","lessThan":"19f5a5839b308697824ff46e6213a2b4cb677771","status":"affected","versionType":"git"},{"version":"ad76b3f7c7a0836e74ac0e316e03988ef3c43564","lessThan":"189ffc7b6cad6390c0695031cb6c7c63472981e8","status":"affected","versionType":"git"},{"version":"ad76b3f7c7a0836e74ac0e316e03988ef3c43564","lessThan":"6a6870d3077faa501ca97760057ddca22b68418d","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98511","source_modified_at":"2026-10-19T09:20:50.368Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"3.19","status":"affected"},{"version":"0","lessThan":"3.19","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.55","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.9","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98511","source_modified_at":"2026-10-19T09:20:50.368Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"5cb7109f0f5f1b47b172e2d5b868d4ce3ae687f8","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98511","source_modified_at":"2026-10-19T09:20:50.368Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"9924c1d64405be8d10b906368dfb1cfe0d0c6bf0","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98511","source_modified_at":"2026-10-19T09:20:50.368Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"73c7093e6cc1e6b181a79e16eccc4b8d4f34d8ee","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98511","source_modified_at":"2026-10-19T09:20:50.368Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"19f5a5839b308697824ff46e6213a2b4cb677771","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98511","source_modified_at":"2026-10-19T09:20:50.368Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"189ffc7b6cad6390c0695031cb6c7c63472981e8","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98511","source_modified_at":"2026-10-19T09:20:50.368Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6a6870d3077faa501ca97760057ddca22b68418d","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00205,"percentile":0.10025,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:17:25.033Z","modified_at":"2026-10-19T09:20:50.368Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98511","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:20:50.368Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98511","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/a6e755acf85793a7b4d29ba27b5421af1087263f"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/5cb7109f0f5f1b47b172e2d5b868d4ce3ae687f8"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/9924c1d64405be8d10b906368dfb1cfe0d0c6bf0"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/73c7093e6cc1e6b181a79e16eccc4b8d4f34d8ee"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/19f5a5839b308697824ff46e6213a2b4cb677771"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/189ffc7b6cad6390c0695031cb6c7c63472981e8"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/6a6870d3077faa501ca97760057ddca22b68418d"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:20:50.368Z","content_hash":"7aa88b7ef0138bf68e66addf13a0e33215b3d8bb9a4170d6b06b701e78696c2d"}}