{"id":"CVE-2026-43449","summary":"nvme-pci: Fix slab-out-of-bounds in nvme_dbbuf_set","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-pci: Fix slab-out-of-bounds in nvme_dbbuf_set\n\ndev-\u003eonline_queues is a count incremented in nvme_init_queue. Thus,\nvalid indices are 0 through dev-\u003eonline_queues − 1.\n\nThis patch fixes the loop condition to ensure the index stays within the\nvalid range. Index 0 is excluded because it is the admin queue.\n\nKASAN splat:\n\n==================================================================\nBUG: KASAN: slab-out-of-bounds in nvme_dbbuf_free drivers/nvme/host/pci.c:377 [inline]\nBUG: KASAN: slab-out-of-bounds in nvme_dbbuf_set+0x39c/0x400 drivers/nvme/host/pci.c:404\nRead of size 2 at addr ffff88800592a574 by task kworker/u8:5/74\n\nCPU: 0 UID: 0 PID: 74 Comm: kworker/u8:5 Not tainted 6.19.0-dirty #10 PREEMPT(voluntary)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\nWorkqueue: nvme-reset-wq nvme_reset_work\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0xea/0x150 lib/dump_stack.c:120\n print_address_description mm/kasan/report.c:378 [inline]\n print_report+0xce/0x5d0 mm/kasan/report.c:482\n kasan_report+0xdc/0x110 mm/kasan/report.c:595\n __asan_report_load2_noabort+0x18/0x20 mm/kasan/report_generic.c:379\n nvme_dbbuf_free drivers/nvme/host/pci.c:377 [inline]\n nvme_dbbuf_set+0x39c/0x400 drivers/nvme/host/pci.c:404\n nvme_reset_work+0x36b/0x8c0 drivers/nvme/host/pci.c:3252\n process_one_work+0x956/0x1aa0 kernel/workqueue.c:3257\n process_scheduled_works kernel/workqueue.c:3340 [inline]\n worker_thread+0x65c/0xe60 kernel/workqueue.c:3421\n kthread+0x41a/0x930 kernel/kthread.c:463\n ret_from_fork+0x6f8/0x8c0 arch/x86/kernel/process.c:158\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246\n \u003c/TASK\u003e\n\nAllocated by task 34 on cpu 1 at 4.241550s:\n kasan_save_stack+0x2c/0x60 mm/kasan/common.c:57\n kasan_save_track+0x1c/0x70 mm/kasan/common.c:78\n kasan_save_alloc_info+0x3c/0x50 mm/kasan/generic.c:570\n poison_kmalloc_redzone mm/kasan/common.c:398 [inline]\n __kasan_kmalloc+0xb5/0xc0 mm/kasan/common.c:415\n kasan_kmalloc include/linux/kasan.h:263 [inline]\n __do_kmalloc_node mm/slub.c:5657 [inline]\n __kmalloc_node_noprof+0x2bf/0x8d0 mm/slub.c:5663\n kmalloc_array_node_noprof include/linux/slab.h:1075 [inline]\n nvme_pci_alloc_dev drivers/nvme/host/pci.c:3479 [inline]\n nvme_probe+0x2f1/0x1820 drivers/nvme/host/pci.c:3534\n local_pci_probe+0xef/0x1c0 drivers/pci/pci-driver.c:324\n pci_call_probe drivers/pci/pci-driver.c:392 [inline]\n __pci_device_probe drivers/pci/pci-driver.c:417 [inline]\n pci_device_probe+0x743/0x920 drivers/pci/pci-driver.c:451\n call_driver_probe drivers/base/dd.c:583 [inline]\n really_probe+0x29b/0xb70 drivers/base/dd.c:661\n __driver_probe_device+0x3b0/0x4a0 drivers/base/dd.c:803\n driver_probe_device+0x56/0x1f0 drivers/base/dd.c:833\n __driver_attach_async_helper+0x155/0x340 drivers/base/dd.c:1159\n async_run_entry_fn+0xa6/0x4b0 kernel/async.c:129\n process_one_work+0x956/0x1aa0 kernel/workqueue.c:3257\n process_scheduled_works kernel/workqueue.c:3340 [inline]\n worker_thread+0x65c/0xe60 kernel/workqueue.c:3421\n kthread+0x41a/0x930 kernel/kthread.c:463\n ret_from_fork+0x6f8/0x8c0 arch/x86/kernel/process.c:158\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246\n\nThe buggy address belongs to the object at ffff88800592a000\n which belongs to the cache kmalloc-2k of size 2048\nThe buggy address is located 244 bytes to the right of\n allocated 1152-byte region [ffff88800592a000, ffff88800592a480)\n\nThe buggy address belongs to the physical page:\npage: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5928\nhead: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0\nanon flags: 0xfffffc0000040(head|node=0|zone=1|lastcpupid=0x1fffff)\npage_type: f5(slab)\nraw: 000fffffc0000040 ffff888001042000 0000000000000000 dead000000000001\nraw: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000\nhead: 000fffffc0000040 ffff888001042000 00000\n---truncated---","modified":"2026-07-15T01:49:00.062139221Z","published":"2026-05-08T14:22:15.276Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43449.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2b9d605c3f0d3262142f196249cd3bd58c857c71"},{"type":"WEB","url":"https://git.kernel.org/stable/c/328c551f0cc81ee776b186b86cc6e5253bb6fda7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/50bad78f03a02d3c0f228edf9912b494d3e7acb9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/78279d2d74c58a0ed64e43cf601a02649771182e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/83e6edd6358326c9c2de31a54bb4a1ec50703f1f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/86183d550559e45e07059bbdf17331fea469e38c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b4e78f1427c7d6859229ae9616df54e1fc05a516"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d7990c936e25f484b61a5adeeadc1d290a9fd16e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43449.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43449"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0f0d2c876c96d4908a9ef40959a44bec21bdd6cf"},{"fixed":"2b9d605c3f0d3262142f196249cd3bd58c857c71"},{"fixed":"86183d550559e45e07059bbdf17331fea469e38c"},{"fixed":"d7990c936e25f484b61a5adeeadc1d290a9fd16e"},{"fixed":"83e6edd6358326c9c2de31a54bb4a1ec50703f1f"},{"fixed":"50bad78f03a02d3c0f228edf9912b494d3e7acb9"},{"fixed":"328c551f0cc81ee776b186b86cc6e5253bb6fda7"},{"fixed":"78279d2d74c58a0ed64e43cf601a02649771182e"},{"fixed":"b4e78f1427c7d6859229ae9616df54e1fc05a516"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"930bb3092fe606baa23d57ae59b70b291d67a8af"},{"last_affected":"fd1c1de8c4589fdd528733bfd01ed0c5f3f69204"},{"last_affected":"4940816604e3ce7e05e8df297773ee86c0476d48"},{"last_affected":"55a3b1ad694631cc2698b5500ac5865d7d0f064e"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.14.210"},{"fixed":"4.15"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.19.161"},{"fixed":"4.20"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.4.81"},{"fixed":"5.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.9.12"},{"fixed":"5.10"}]}],"versions":["v5.9","v5.9.11","v5.4.80","v4.19.160","v4.14.209","v5.9.10","v5.4.79","v4.19.159","v4.14.208","v5.9.9","v5.4.78","v4.19.158","v4.14.207","v5.9.8","v5.4.77","v4.19.157","v4.14.206","v5.9.7","v5.4.76","v4.19.156","v4.14.205","v5.9.6","v5.4.75","v4.19.155","v4.14.204","v5.9.5","v5.9.4","v5.4.74","v4.19.154","v4.14.203","v5.9.3","v5.9.2","v5.4.73","v4.19.153","v5.9.1","v5.4.72","v4.19.152","v5.9-rc1","v4.14.202","v5.9-rc7","v4.14.201","v4.19.151","v5.4.71","v5.4.70","v4.19.150","v4.14.200","v5.9-rc8","v5.9-rc6","v5.9-rc4","v5.9-rc5","v5.4.69","v4.19.149","v5.9-rc3","v5.4.68","v4.19.148","v4.14.199","v5.4.67","v4.19.147","v5.9-rc2","v5.4.66","v4.19.146","v4.14.198","v5.4.65","v4.19.145","v5.4.64","v4.19.144","v4.14.197","v5.4.63","v4.19.143","v4.14.196","v5.4.62","v5.8","v5.4.61","v4.19.142","v4.14.195","v5.4.60","v4.19.141","v4.14.194","v5.4.59","v4.19.140","v4.14.193","v5.4.58","v4.19.139","v5.4.57","v4.19.138","v4.14.192","v4.19.137","v5.4.56","v5.7","v5.8-rc2","v5.8-rc1","v5.8-rc7","v4.14.191","v4.19.136","v5.4.55","v5.8-rc5","v5.4.54","v4.19.135","v4.14.190","v5.8-rc3","v5.8-rc4","v5.4.53","v4.19.134","v4.14.189","v5.8-rc6","v5.4.52","v4.19.133","v4.14.188","v4.19.132","v5.4.51","v5.4.50","v4.19.131","v4.14.187","v4.19.130","v4.14.186","v5.4.49","v5.7-rc4","v4.14.185","v4.19.129","v5.4.48","v5.4.47","v4.19.128","v4.14.184","v5.4.46","v4.14.183","v4.19.127","v5.4.45","v5.4.44","v4.19.126","v5.7-rc7","v5.7-rc1","v5.4.43","v4.19.125","v4.14.182","v5.7-rc3","v5.7-rc2","v5.7-rc5","v5.4.42","v4.19.124","v4.14.181","v5.7-rc6","v5.4.41","v4.19.123","v4.14.180","v5.4.40","v4.19.122","v5.6","v5.4.39","v4.19.121","v4.14.179","v5.4.38","v4.19.120","v4.14.178","v5.4.37","v4.19.119","v4.14.177","v5.4.36","v5.4.35","v4.19.118","v4.14.176","v5.4.34","v4.19.117","v5.4.33","v4.19.116","v5.4.32","v4.19.115","v5.4.31","v4.19.114","v4.14.175","v5.4.30","v5.6-rc1","v4.14.174","v4.19.113","v5.4.29","v5.4.28","v5.6-rc7","v5.6-rc6","v5.6-rc3","v5.6-rc4","v5.6-rc2","v5.6-rc5","v5.4.27","v4.19.112","v5.4.26","v4.19.111","v4.14.173","v5.4.25","v4.19.110","v4.19.109","v5.4.24","v4.14.172","v4.19.108","v5.4.23","v4.19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