{"cve":"CVE-2026-43449","nvd":{"published":"2026-05-08T15:16:57.477","modified":"2026-06-17T10:49:37.297","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-pci: Fix slab-out-of-bounds in nvme_dbbuf_set\n\ndev->online_queues is a count incremented in nvme_init_queue. Thus,\nvalid indices are 0 through dev->online_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 <TASK>\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 </TASK>\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---","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","score":7.1},"cwes":["CWE-125"],"references":["https://git.kernel.org/stable/c/2b9d605c3f0d3262142f196249cd3bd58c857c71","https://git.kernel.org/stable/c/328c551f0cc81ee776b186b86cc6e5253bb6fda7","https://git.kernel.org/stable/c/50bad78f03a02d3c0f228edf9912b494d3e7acb9","https://git.kernel.org/stable/c/78279d2d74c58a0ed64e43cf601a02649771182e","https://git.kernel.org/stable/c/83e6edd6358326c9c2de31a54bb4a1ec50703f1f"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-43449","score":0.00126,"percentile":0.02287,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}