{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43449",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:56.010Z",
        "datePublished": "2026-05-08T14:22:15.276Z",
        "dateUpdated": "2026-05-23T16:07:01.436Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T16:07:01.436Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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---"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/nvme/host/pci.c"
                    ],
                    "versions": [
                        {
                            "version": "0f0d2c876c96d4908a9ef40959a44bec21bdd6cf",
                            "lessThan": "2b9d605c3f0d3262142f196249cd3bd58c857c71",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0f0d2c876c96d4908a9ef40959a44bec21bdd6cf",
                            "lessThan": "86183d550559e45e07059bbdf17331fea469e38c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0f0d2c876c96d4908a9ef40959a44bec21bdd6cf",
                            "lessThan": "d7990c936e25f484b61a5adeeadc1d290a9fd16e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0f0d2c876c96d4908a9ef40959a44bec21bdd6cf",
                            "lessThan": "83e6edd6358326c9c2de31a54bb4a1ec50703f1f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0f0d2c876c96d4908a9ef40959a44bec21bdd6cf",
                            "lessThan": "50bad78f03a02d3c0f228edf9912b494d3e7acb9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0f0d2c876c96d4908a9ef40959a44bec21bdd6cf",
                            "lessThan": "328c551f0cc81ee776b186b86cc6e5253bb6fda7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0f0d2c876c96d4908a9ef40959a44bec21bdd6cf",
                            "lessThan": "78279d2d74c58a0ed64e43cf601a02649771182e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0f0d2c876c96d4908a9ef40959a44bec21bdd6cf",
                            "lessThan": "b4e78f1427c7d6859229ae9616df54e1fc05a516",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "930bb3092fe606baa23d57ae59b70b291d67a8af",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fd1c1de8c4589fdd528733bfd01ed0c5f3f69204",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4940816604e3ce7e05e8df297773ee86c0476d48",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "55a3b1ad694631cc2698b5500ac5865d7d0f064e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4.14.210",
                            "lessThan": "4.15",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.19.161",
                            "lessThan": "4.20",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.81",
                            "lessThan": "5.5",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.9.12",
                            "lessThan": "5.10",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/nvme/host/pci.c"
                    ],
                    "versions": [
                        {
                            "version": "5.10",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.10",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.253",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.203",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.167",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.130",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.78",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.19",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.9",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "5.10.253"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "5.15.203"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "6.1.167"
                                },
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                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "6.6.130"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "6.12.78"
                                },
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                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "6.19.9"
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                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "7.0"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.14.210"
                                },
                                {
                                    "vulnerable": true,
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                                    "versionStartIncluding": "4.19.161"
                                },
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.4.81"
                                },
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.9.12"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/2b9d605c3f0d3262142f196249cd3bd58c857c71"
                },
                {
                    "url": "https://git.kernel.org/stable/c/86183d550559e45e07059bbdf17331fea469e38c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d7990c936e25f484b61a5adeeadc1d290a9fd16e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/83e6edd6358326c9c2de31a54bb4a1ec50703f1f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/50bad78f03a02d3c0f228edf9912b494d3e7acb9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/328c551f0cc81ee776b186b86cc6e5253bb6fda7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/78279d2d74c58a0ed64e43cf601a02649771182e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b4e78f1427c7d6859229ae9616df54e1fc05a516"
                }
            ],
            "title": "nvme-pci: Fix slab-out-of-bounds in nvme_dbbuf_set",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}