{"cve":"CVE-2024-26891","nvd":{"published":"2024-04-17T11:15:10.477","modified":"2026-10-15T01:17:29.653","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Don't issue ATS Invalidation request when device is disconnected\n\nFor those endpoint devices connect to system via hotplug capable ports,\nusers could request a hot reset to the device by flapping device's link\nthrough setting the slot's link control register, as pciehp_ist() DLLSC\ninterrupt sequence response, pciehp will unload the device driver and\nthen power it off. thus cause an IOMMU device-TLB invalidation (Intel\nVT-d spec, or ATS Invalidation in PCIe spec r6.1) request for non-existence\ntarget device to be sent and deadly loop to retry that request after ITE\nfault triggered in interrupt context.\n\nThat would cause following continuous hard lockup warning and system hang\n\n[ 4211.433662] pcieport 0000:17:01.0: pciehp: Slot(108): Link Down\n[ 4211.433664] pcieport 0000:17:01.0: pciehp: Slot(108): Card not present\n[ 4223.822591] NMI watchdog: Watchdog detected hard LOCKUP on cpu 144\n[ 4223.822622] CPU: 144 PID: 1422 Comm: irq/57-pciehp Kdump: loaded Tainted: G S\n         OE    kernel version xxxx\n[ 4223.822623] Hardware name: vendorname xxxx 666-106,\nBIOS 01.01.02.03.01 05/15/2023\n[ 4223.822623] RIP: 0010:qi_submit_sync+0x2c0/0x490\n[ 4223.822624] Code: 48 be 00 00 00 00 00 08 00 00 49 85 74 24 20 0f 95 c1 48 8b\n 57 10 83 c1 04 83 3c 1a 03 0f 84 a2 01 00 00 49 8b 04 24 8b 70 34 <40> f6 c6 1\n0 74 17 49 8b 04 24 8b 80 80 00 00 00 89 c2 d3 fa 41 39\n[ 4223.822624] RSP: 0018:ffffc4f074f0bbb8 EFLAGS: 00000093\n[ 4223.822625] RAX: ffffc4f040059000 RBX: 0000000000000014 RCX: 0000000000000005\n[ 4223.822625] RDX: ffff9f3841315800 RSI: 0000000000000000 RDI: ffff9f38401a8340\n[ 4223.822625] RBP: ffff9f38401a8340 R08: ffffc4f074f0bc00 R09: 0000000000000000\n[ 4223.822626] R10: 0000000000000010 R11: 0000000000000018 R12: ffff9f384005e200\n[ 4223.822626] R13: 0000000000000004 R14: 0000000000000046 R15: 0000000000000004\n[ 4223.822626] FS:  0000000000000000(0000) GS:ffffa237ae400000(0000)\nknlGS:0000000000000000\n[ 4223.822627] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 4223.822627] CR2: 00007ffe86515d80 CR3: 000002fd3000a001 CR4: 0000000000770ee0\n[ 4223.822627] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 4223.822628] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400\n[ 4223.822628] PKRU: 55555554\n[ 4223.822628] Call Trace:\n[ 4223.822628]  qi_flush_dev_iotlb+0xb1/0xd0\n[ 4223.822628]  __dmar_remove_one_dev_info+0x224/0x250\n[ 4223.822629]  dmar_remove_one_dev_info+0x3e/0x50\n[ 4223.822629]  intel_iommu_release_device+0x1f/0x30\n[ 4223.822629]  iommu_release_device+0x33/0x60\n[ 4223.822629]  iommu_bus_notifier+0x7f/0x90\n[ 4223.822630]  blocking_notifier_call_chain+0x60/0x90\n[ 4223.822630]  device_del+0x2e5/0x420\n[ 4223.822630]  pci_remove_bus_device+0x70/0x110\n[ 4223.822630]  pciehp_unconfigure_device+0x7c/0x130\n[ 4223.822631]  pciehp_disable_slot+0x6b/0x100\n[ 4223.822631]  pciehp_handle_presence_or_link_change+0xd8/0x320\n[ 4223.822631]  pciehp_ist+0x176/0x180\n[ 4223.822631]  ? irq_finalize_oneshot.part.50+0x110/0x110\n[ 4223.822632]  irq_thread_fn+0x19/0x50\n[ 4223.822632]  irq_thread+0x104/0x190\n[ 4223.822632]  ? irq_forced_thread_fn+0x90/0x90\n[ 4223.822632]  ? irq_thread_check_affinity+0xe0/0xe0\n[ 4223.822633]  kthread+0x114/0x130\n[ 4223.822633]  ? __kthread_cancel_work+0x40/0x40\n[ 4223.822633]  ret_from_fork+0x1f/0x30\n[ 4223.822633] Kernel panic - not syncing: Hard LOCKUP\n[ 4223.822634] CPU: 144 PID: 1422 Comm: irq/57-pciehp Kdump: loaded Tainted: G S\n         OE     kernel version xxxx\n[ 4223.822634] Hardware name: vendorname xxxx 666-106,\nBIOS 01.01.02.03.01 05/15/2023\n[ 4223.822634] Call Trace:\n[ 4223.822634]  <NMI>\n[ 4223.822635]  dump_stack+0x6d/0x88\n[ 4223.822635]  panic+0x101/0x2d0\n[ 4223.822635]  ? ret_from_fork+0x11/0x30\n[ 4223.822635]  nmi_panic.cold.14+0xc/0xc\n[ 4223.822636]  watchdog_overflow_callback.cold.8+0x6d/0x81\n[ 4223.822636]  __perf_event_overflow+0x4f/0xf0\n[ 4223.822636]  handle_pmi_common\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:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/025bc6b41e020aeb1e71f84ae3ffce945026de05","https://git.kernel.org/stable/c/2b74b2a92e524d7c8dec8e02e95ecf18b667c062","https://git.kernel.org/stable/c/34a7b30f56d30114bf4d436e4dc793afe326fbcf","https://git.kernel.org/stable/c/4fc82cd907ac075648789cc3a00877778aa1838b","https://git.kernel.org/stable/c/c04f2780919f20e2cc4846764221f5e802555868"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:49:08.435428910+00:00"},"epss":{"cve":"CVE-2024-26891","score":0.00231,"percentile":0.13826,"date":"2026-10-25"},"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."]}