CVE-2026-43448

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> nvme-pci: Fix race bug in nvme_poll_irqdisable()<br /> <br /> In the following scenario, pdev can be disabled between (1) and (3) by<br /> (2). This sets pdev-&gt;msix_enabled = 0. Then, pci_irq_vector() will<br /> return MSI-X IRQ(&gt;15) for (1) whereas return INTx IRQ(cq_vector)) ...(1)<br /> enable_irq(pci_irq_vector(pdev, nvmeq-&gt;cq_vector)) ...(3)<br /> <br /> task 2:<br /> nvme_reset_work()<br /> nvme_dev_disable()<br /> pdev-&gt;msix_enable = 0; ...(2)<br /> <br /> crash log:<br /> <br /> ------------[ cut here ]------------<br /> Unbalanced enable for IRQ 10<br /> WARNING: kernel/irq/manage.c:753 at __enable_irq+0x102/0x190 kernel/irq/manage.c:753, CPU#1: kworker/1:0H/26<br /> Modules linked in:<br /> CPU: 1 UID: 0 PID: 26 Comm: kworker/1:0H Not tainted 6.19.0-dirty #9 PREEMPT(voluntary)<br /> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014<br /> Workqueue: kblockd blk_mq_timeout_work<br /> RIP: 0010:__enable_irq+0x107/0x190 kernel/irq/manage.c:753<br /> 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 48 0f b9 3a e8 ef b9 21 00 5b 41 5c 5d e9 46 54 66 03 e8 e1 b9<br /> RSP: 0018:ffffc900001bf550 EFLAGS: 00010046<br /> RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffffb20c0e90<br /> RDX: 0000000000000000 RSI: 000000000000000a RDI: ffffffffb74b88f0<br /> RBP: ffffc900001bf560 R08: ffff88800197cf00 R09: 0000000000000001<br /> R10: 0000000000000003 R11: 0000000000000003 R12: ffff8880012a6000<br /> R13: 1ffff92000037eae R14: 000000000000000a R15: 0000000000000293<br /> FS: 0000000000000000(0000) GS:ffff8880b49f7000(0000) knlGS:0000000000000000<br /> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033<br /> CR2: 0000555da4a25fa8 CR3: 00000000208e8000 CR4: 00000000000006f0<br /> Call Trace:<br /> <br /> enable_irq+0x121/0x1e0 kernel/irq/manage.c:797<br /> nvme_poll_irqdisable+0x162/0x1c0 drivers/nvme/host/pci.c:1494<br /> nvme_timeout+0x965/0x14b0 drivers/nvme/host/pci.c:1744<br /> blk_mq_rq_timed_out block/blk-mq.c:1653 [inline]<br /> blk_mq_handle_expired+0x227/0x2d0 block/blk-mq.c:1721<br /> bt_iter+0x2fc/0x3a0 block/blk-mq-tag.c:292<br /> __sbitmap_for_each_set include/linux/sbitmap.h:269 [inline]<br /> sbitmap_for_each_set include/linux/sbitmap.h:290 [inline]<br /> bt_for_each block/blk-mq-tag.c:324 [inline]<br /> blk_mq_queue_tag_busy_iter+0x969/0x1e80 block/blk-mq-tag.c:536<br /> blk_mq_timeout_work+0x627/0x870 block/blk-mq.c:1763<br /> process_one_work+0x956/0x1aa0 kernel/workqueue.c:3257<br /> process_scheduled_works kernel/workqueue.c:3340 [inline]<br /> worker_thread+0x65c/0xe60 kernel/workqueue.c:3421<br /> kthread+0x41a/0x930 kernel/kthread.c:463<br /> ret_from_fork+0x6f8/0x8c0 arch/x86/kernel/process.c:158<br /> ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246<br /> <br /> irq event stamp: 74478<br /> hardirqs last enabled at (74477): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]<br /> hardirqs last enabled at (74477): [] _raw_spin_unlock_irq+0x2c/0x60 kernel/locking/spinlock.c:202<br /> hardirqs last disabled at (74478): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]<br /> hardirqs last disabled at (74478): [] _raw_spin_lock_irqsave+0x85/0xa0 kernel/locking/spinlock.c:162<br /> softirqs last enabled at (74304): [] __do_softirq kernel/softirq.c:656 [inline]<br /> softirqs last enabled at (74304): [] invoke_softirq kernel/softirq.c:496 [inline]<br /> softirqs last enabled at (74304): [] __irq_exit_rcu+0xdc/0x120<br /> ---truncated---