CVE-2026-43449: Software Security Vulnerability Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-hv7m-w2x8-mf6q",
  "modified" : "2026-05-21T18:33:06Z",
  "published" : "2026-05-08T15:31:29Z",
  "aliases" : [ "CVE-2026-43449" ],
  "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->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---",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-43449"
  }, {
    "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"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-125" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-08T15:16:57Z"
  }
}