CVE-2026-43448 (GCVE-0-2026-43448)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:22 – Updated: 2026-05-08 14:22
VLAI?
Title
nvme-pci: Fix race bug in nvme_poll_irqdisable()
Summary
In the Linux kernel, the following vulnerability has been resolved: nvme-pci: Fix race bug in nvme_poll_irqdisable() In the following scenario, pdev can be disabled between (1) and (3) by (2). This sets pdev->msix_enabled = 0. Then, pci_irq_vector() will return MSI-X IRQ(>15) for (1) whereas return INTx IRQ(<=15) for (2). This causes IRQ warning because it tries to enable INTx IRQ that has never been disabled before. To fix this, save IRQ number into a local variable and ensure disable_irq() and enable_irq() operate on the same IRQ number. Even if pci_free_irq_vectors() frees the IRQ concurrently, disable_irq() and enable_irq() on a stale IRQ number is still valid and safe, and the depth accounting reamins balanced. task 1: nvme_poll_irqdisable() disable_irq(pci_irq_vector(pdev, nvmeq->cq_vector)) ...(1) enable_irq(pci_irq_vector(pdev, nvmeq->cq_vector)) ...(3) task 2: nvme_reset_work() nvme_dev_disable() pdev->msix_enable = 0; ...(2) crash log: ------------[ cut here ]------------ Unbalanced enable for IRQ 10 WARNING: kernel/irq/manage.c:753 at __enable_irq+0x102/0x190 kernel/irq/manage.c:753, CPU#1: kworker/1:0H/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:0H Not tainted 6.19.0-dirty #9 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 Workqueue: kblockd blk_mq_timeout_work RIP: 0010:__enable_irq+0x107/0x190 kernel/irq/manage.c:753 Code: ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8d 3d 2e 7a 3f 05 41 8b 74 24 2c <67> 48 0f b9 3a e8 ef b9 21 00 5b 41 5c 5d e9 46 54 66 03 e8 e1 b9 RSP: 0018:ffffc900001bf550 EFLAGS: 00010046 RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffffb20c0e90 RDX: 0000000000000000 RSI: 000000000000000a RDI: ffffffffb74b88f0 RBP: ffffc900001bf560 R08: ffff88800197cf00 R09: 0000000000000001 R10: 0000000000000003 R11: 0000000000000003 R12: ffff8880012a6000 R13: 1ffff92000037eae R14: 000000000000000a R15: 0000000000000293 FS: 0000000000000000(0000) GS:ffff8880b49f7000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555da4a25fa8 CR3: 00000000208e8000 CR4: 00000000000006f0 Call Trace: <TASK> enable_irq+0x121/0x1e0 kernel/irq/manage.c:797 nvme_poll_irqdisable+0x162/0x1c0 drivers/nvme/host/pci.c:1494 nvme_timeout+0x965/0x14b0 drivers/nvme/host/pci.c:1744 blk_mq_rq_timed_out block/blk-mq.c:1653 [inline] blk_mq_handle_expired+0x227/0x2d0 block/blk-mq.c:1721 bt_iter+0x2fc/0x3a0 block/blk-mq-tag.c:292 __sbitmap_for_each_set include/linux/sbitmap.h:269 [inline] sbitmap_for_each_set include/linux/sbitmap.h:290 [inline] bt_for_each block/blk-mq-tag.c:324 [inline] blk_mq_queue_tag_busy_iter+0x969/0x1e80 block/blk-mq-tag.c:536 blk_mq_timeout_work+0x627/0x870 block/blk-mq.c:1763 process_one_work+0x956/0x1aa0 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x65c/0xe60 kernel/workqueue.c:3421 kthread+0x41a/0x930 kernel/kthread.c:463 ret_from_fork+0x6f8/0x8c0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 </TASK> irq event stamp: 74478 hardirqs last enabled at (74477): [<ffffffffb5720a9c>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (74477): [<ffffffffb5720a9c>] _raw_spin_unlock_irq+0x2c/0x60 kernel/locking/spinlock.c:202 hardirqs last disabled at (74478): [<ffffffffb57207b5>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (74478): [<ffffffffb57207b5>] _raw_spin_lock_irqsave+0x85/0xa0 kernel/locking/spinlock.c:162 softirqs last enabled at (74304): [<ffffffffb1e9466c>] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (74304): [<ffffffffb1e9466c>] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (74304): [<ffffffffb1e9466c>] __irq_exit_rcu+0xdc/0x120 ---truncated---
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: fa059b856a593a7bddd4d3779ae8ab1380e05d91 , < 265dbc9bc33c29f60f90be3e0afe1c4067ebb70b (git)
Affected: fa059b856a593a7bddd4d3779ae8ab1380e05d91 , < 628773eba024d1107cc9ec157a682cbb42ac912a (git)
Affected: fa059b856a593a7bddd4d3779ae8ab1380e05d91 , < 843e913cef4e33723663a899727f685a95ab53fe (git)
Affected: fa059b856a593a7bddd4d3779ae8ab1380e05d91 , < b56c49897bdac5cb49e3495ef421c391628ee9bb (git)
Affected: fa059b856a593a7bddd4d3779ae8ab1380e05d91 , < e311d84c62eb76e025e11a44155b402e55950b83 (git)
Affected: fa059b856a593a7bddd4d3779ae8ab1380e05d91 , < fc71f409b22ca831a9f87a2712eaa09ef2bb4a5e (git)
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    Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.19 , ≤ 6.18.* (semver)
Unaffected: 6.19.9 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/host/pci.c"
          ],
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            }
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      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-pci: Fix race bug in nvme_poll_irqdisable()\n\nIn the following scenario, pdev can be disabled between (1) and (3) by\n(2). This sets pdev-\u003emsix_enabled = 0. Then, pci_irq_vector() will\nreturn MSI-X IRQ(\u003e15) for (1) whereas return INTx IRQ(\u003c=15) for (2).\nThis causes IRQ warning because it tries to enable INTx IRQ that has\nnever been disabled before.\n\nTo fix this, save IRQ number into a local variable and ensure\ndisable_irq() and enable_irq() operate on the same IRQ number.  Even if\npci_free_irq_vectors() frees the IRQ concurrently, disable_irq() and\nenable_irq() on a stale IRQ number is still valid and safe, and the\ndepth accounting reamins balanced.\n\ntask 1:\nnvme_poll_irqdisable()\n  disable_irq(pci_irq_vector(pdev, nvmeq-\u003ecq_vector)) ...(1)\n  enable_irq(pci_irq_vector(pdev, nvmeq-\u003ecq_vector))  ...(3)\n\ntask 2:\nnvme_reset_work()\n  nvme_dev_disable()\n    pdev-\u003emsix_enable = 0;  ...(2)\n\ncrash log:\n\n------------[ cut here ]------------\nUnbalanced enable for IRQ 10\nWARNING: kernel/irq/manage.c:753 at __enable_irq+0x102/0x190 kernel/irq/manage.c:753, CPU#1: kworker/1:0H/26\nModules linked in:\nCPU: 1 UID: 0 PID: 26 Comm: kworker/1:0H Not tainted 6.19.0-dirty #9 PREEMPT(voluntary)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\nWorkqueue: kblockd blk_mq_timeout_work\nRIP: 0010:__enable_irq+0x107/0x190 kernel/irq/manage.c:753\nCode: ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8d 3d 2e 7a 3f 05 41 8b 74 24 2c \u003c67\u003e 48 0f b9 3a e8 ef b9 21 00 5b 41 5c 5d e9 46 54 66 03 e8 e1 b9\nRSP: 0018:ffffc900001bf550 EFLAGS: 00010046\nRAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffffb20c0e90\nRDX: 0000000000000000 RSI: 000000000000000a RDI: ffffffffb74b88f0\nRBP: ffffc900001bf560 R08: ffff88800197cf00 R09: 0000000000000001\nR10: 0000000000000003 R11: 0000000000000003 R12: ffff8880012a6000\nR13: 1ffff92000037eae R14: 000000000000000a R15: 0000000000000293\nFS:  0000000000000000(0000) GS:ffff8880b49f7000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000555da4a25fa8 CR3: 00000000208e8000 CR4: 00000000000006f0\nCall Trace:\n \u003cTASK\u003e\n enable_irq+0x121/0x1e0 kernel/irq/manage.c:797\n nvme_poll_irqdisable+0x162/0x1c0 drivers/nvme/host/pci.c:1494\n nvme_timeout+0x965/0x14b0 drivers/nvme/host/pci.c:1744\n blk_mq_rq_timed_out block/blk-mq.c:1653 [inline]\n blk_mq_handle_expired+0x227/0x2d0 block/blk-mq.c:1721\n bt_iter+0x2fc/0x3a0 block/blk-mq-tag.c:292\n __sbitmap_for_each_set include/linux/sbitmap.h:269 [inline]\n sbitmap_for_each_set include/linux/sbitmap.h:290 [inline]\n bt_for_each block/blk-mq-tag.c:324 [inline]\n blk_mq_queue_tag_busy_iter+0x969/0x1e80 block/blk-mq-tag.c:536\n blk_mq_timeout_work+0x627/0x870 block/blk-mq.c:1763\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\nirq event stamp: 74478\nhardirqs last  enabled at (74477): [\u003cffffffffb5720a9c\u003e] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]\nhardirqs last  enabled at (74477): [\u003cffffffffb5720a9c\u003e] _raw_spin_unlock_irq+0x2c/0x60 kernel/locking/spinlock.c:202\nhardirqs last disabled at (74478): [\u003cffffffffb57207b5\u003e] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]\nhardirqs last disabled at (74478): [\u003cffffffffb57207b5\u003e] _raw_spin_lock_irqsave+0x85/0xa0 kernel/locking/spinlock.c:162\nsoftirqs last  enabled at (74304): [\u003cffffffffb1e9466c\u003e] __do_softirq kernel/softirq.c:656 [inline]\nsoftirqs last  enabled at (74304): [\u003cffffffffb1e9466c\u003e] invoke_softirq kernel/softirq.c:496 [inline]\nsoftirqs last  enabled at (74304): [\u003cffffffffb1e9466c\u003e] __irq_exit_rcu+0xdc/0x120\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-08T14:22:14.633Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/265dbc9bc33c29f60f90be3e0afe1c4067ebb70b"
        },
        {
          "url": "https://git.kernel.org/stable/c/628773eba024d1107cc9ec157a682cbb42ac912a"
        },
        {
          "url": "https://git.kernel.org/stable/c/843e913cef4e33723663a899727f685a95ab53fe"
        },
        {
          "url": "https://git.kernel.org/stable/c/b56c49897bdac5cb49e3495ef421c391628ee9bb"
        },
        {
          "url": "https://git.kernel.org/stable/c/e311d84c62eb76e025e11a44155b402e55950b83"
        },
        {
          "url": "https://git.kernel.org/stable/c/fc71f409b22ca831a9f87a2712eaa09ef2bb4a5e"
        }
      ],
      "title": "nvme-pci: Fix race bug in nvme_poll_irqdisable()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43448",
    "datePublished": "2026-05-08T14:22:14.633Z",
    "dateReserved": "2026-05-01T14:12:56.010Z",
    "dateUpdated": "2026-05-08T14:22:14.633Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-43448\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-08T15:16:57.323\",\"lastModified\":\"2026-05-08T15:16:57.323\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnvme-pci: Fix race bug in nvme_poll_irqdisable()\\n\\nIn the following scenario, pdev can be disabled between (1) and (3) by\\n(2). This sets pdev-\u003emsix_enabled = 0. Then, pci_irq_vector() will\\nreturn MSI-X IRQ(\u003e15) for (1) whereas return INTx IRQ(\u003c=15) for (2).\\nThis causes IRQ warning because it tries to enable INTx IRQ that has\\nnever been disabled before.\\n\\nTo fix this, save IRQ number into a local variable and ensure\\ndisable_irq() and enable_irq() operate on the same IRQ number.  Even if\\npci_free_irq_vectors() frees the IRQ concurrently, disable_irq() and\\nenable_irq() on a stale IRQ number is still valid and safe, and the\\ndepth accounting reamins balanced.\\n\\ntask 1:\\nnvme_poll_irqdisable()\\n  disable_irq(pci_irq_vector(pdev, nvmeq-\u003ecq_vector)) ...(1)\\n  enable_irq(pci_irq_vector(pdev, nvmeq-\u003ecq_vector))  ...(3)\\n\\ntask 2:\\nnvme_reset_work()\\n  nvme_dev_disable()\\n    pdev-\u003emsix_enable = 0;  ...(2)\\n\\ncrash log:\\n\\n------------[ cut here ]------------\\nUnbalanced enable for IRQ 10\\nWARNING: kernel/irq/manage.c:753 at __enable_irq+0x102/0x190 kernel/irq/manage.c:753, CPU#1: kworker/1:0H/26\\nModules linked in:\\nCPU: 1 UID: 0 PID: 26 Comm: kworker/1:0H Not tainted 6.19.0-dirty #9 PREEMPT(voluntary)\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\\nWorkqueue: kblockd blk_mq_timeout_work\\nRIP: 0010:__enable_irq+0x107/0x190 kernel/irq/manage.c:753\\nCode: ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8d 3d 2e 7a 3f 05 41 8b 74 24 2c \u003c67\u003e 48 0f b9 3a e8 ef b9 21 00 5b 41 5c 5d e9 46 54 66 03 e8 e1 b9\\nRSP: 0018:ffffc900001bf550 EFLAGS: 00010046\\nRAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffffb20c0e90\\nRDX: 0000000000000000 RSI: 000000000000000a RDI: ffffffffb74b88f0\\nRBP: ffffc900001bf560 R08: ffff88800197cf00 R09: 0000000000000001\\nR10: 0000000000000003 R11: 0000000000000003 R12: ffff8880012a6000\\nR13: 1ffff92000037eae R14: 000000000000000a R15: 0000000000000293\\nFS:  0000000000000000(0000) GS:ffff8880b49f7000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 0000555da4a25fa8 CR3: 00000000208e8000 CR4: 00000000000006f0\\nCall Trace:\\n \u003cTASK\u003e\\n enable_irq+0x121/0x1e0 kernel/irq/manage.c:797\\n nvme_poll_irqdisable+0x162/0x1c0 drivers/nvme/host/pci.c:1494\\n nvme_timeout+0x965/0x14b0 drivers/nvme/host/pci.c:1744\\n blk_mq_rq_timed_out block/blk-mq.c:1653 [inline]\\n blk_mq_handle_expired+0x227/0x2d0 block/blk-mq.c:1721\\n bt_iter+0x2fc/0x3a0 block/blk-mq-tag.c:292\\n __sbitmap_for_each_set include/linux/sbitmap.h:269 [inline]\\n sbitmap_for_each_set include/linux/sbitmap.h:290 [inline]\\n bt_for_each block/blk-mq-tag.c:324 [inline]\\n blk_mq_queue_tag_busy_iter+0x969/0x1e80 block/blk-mq-tag.c:536\\n blk_mq_timeout_work+0x627/0x870 block/blk-mq.c:1763\\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\\nirq event stamp: 74478\\nhardirqs last  enabled at (74477): [\u003cffffffffb5720a9c\u003e] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]\\nhardirqs last  enabled at (74477): [\u003cffffffffb5720a9c\u003e] _raw_spin_unlock_irq+0x2c/0x60 kernel/locking/spinlock.c:202\\nhardirqs last disabled at (74478): [\u003cffffffffb57207b5\u003e] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]\\nhardirqs last disabled at (74478): [\u003cffffffffb57207b5\u003e] _raw_spin_lock_irqsave+0x85/0xa0 kernel/locking/spinlock.c:162\\nsoftirqs last  enabled at (74304): [\u003cffffffffb1e9466c\u003e] __do_softirq kernel/softirq.c:656 [inline]\\nsoftirqs last  enabled at (74304): [\u003cffffffffb1e9466c\u003e] invoke_softirq kernel/softirq.c:496 [inline]\\nsoftirqs last  enabled at (74304): [\u003cffffffffb1e9466c\u003e] __irq_exit_rcu+0xdc/0x120\\n---truncated---\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/265dbc9bc33c29f60f90be3e0afe1c4067ebb70b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/628773eba024d1107cc9ec157a682cbb42ac912a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/843e913cef4e33723663a899727f685a95ab53fe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b56c49897bdac5cb49e3495ef421c391628ee9bb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e311d84c62eb76e025e11a44155b402e55950b83\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fc71f409b22ca831a9f87a2712eaa09ef2bb4a5e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.