{ "document": { "aggregate_severity": { "text": "Critical" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/amazonlinux2els/vex/2026/cve-2026-98511-els_os-amazonlinux2els.json" } ], "tracking": { "current_release_date": "2026-11-07T21:42:29Z", "generator": { "date": "2026-11-07T21:42:29Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-98511-ELS_OS-AMAZONLINUX2ELS", "initial_release_date": "2026-10-18T16:17:00Z", "revision_history": [ { "date": "2026-10-18T16:17:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-11-07T21:42:29Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security 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"vulnerabilities": [ { "cve": "CVE-2026-98511", "notes": [ { "category": "description", "text": "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\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---", "title": "Vulnerability description" } ], "product_status": { "fixed": [ 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"Amazon-Linux-2:perf-0:5.10.259-258.1046.amzn2.tuxcare.els2.x86_64", "Amazon-Linux-2:perf-0:5.10.272-271.1109.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:perf-0:5.10.272-271.1109.amzn2.tuxcare.els2.x86_64", "Amazon-Linux-2:perf-0:5.10.273-274.1999.amzn2.x86_64", "Amazon-Linux-2:python-perf-0:5.10.259-258.1046.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:python-perf-0:5.10.259-258.1046.amzn2.tuxcare.els2.x86_64", "Amazon-Linux-2:python-perf-0:5.10.272-271.1109.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:python-perf-0:5.10.272-271.1109.amzn2.tuxcare.els2.x86_64", "Amazon-Linux-2:python-perf-0:5.10.273-274.1999.amzn2.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-98511" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/189ffc7b6cad6390c0695031cb6c7c63472981e8", "url": "https://git.kernel.org/stable/c/189ffc7b6cad6390c0695031cb6c7c63472981e8" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/19f5a5839b308697824ff46e6213a2b4cb677771", "url": "https://git.kernel.org/stable/c/19f5a5839b308697824ff46e6213a2b4cb677771" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/5cb7109f0f5f1b47b172e2d5b868d4ce3ae687f8", "url": "https://git.kernel.org/stable/c/5cb7109f0f5f1b47b172e2d5b868d4ce3ae687f8" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/6a6870d3077faa501ca97760057ddca22b68418d", "url": "https://git.kernel.org/stable/c/6a6870d3077faa501ca97760057ddca22b68418d" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/6d6e9291413fda06588846cbbf09b789a0e948fa", "url": "https://git.kernel.org/stable/c/6d6e9291413fda06588846cbbf09b789a0e948fa" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/73c7093e6cc1e6b181a79e16eccc4b8d4f34d8ee", "url": "https://git.kernel.org/stable/c/73c7093e6cc1e6b181a79e16eccc4b8d4f34d8ee" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/9924c1d64405be8d10b906368dfb1cfe0d0c6bf0", "url": "https://git.kernel.org/stable/c/9924c1d64405be8d10b906368dfb1cfe0d0c6bf0" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/a6e755acf85793a7b4d29ba27b5421af1087263f", "url": "https://git.kernel.org/stable/c/a6e755acf85793a7b4d29ba27b5421af1087263f" } ], "release_date": "2026-10-18T16:17:00Z", "remediations": [ { "category": "vendor_fix", "date": "2026-11-05T12:53:42.499096Z", "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1793883221", "product_ids": [ "Amazon-Linux-2:bpftool-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-devel-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-headers-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-tools-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", 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