CVE-2024-26891

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2024-04-17. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

iommu/vt-d: Don't issue ATS Invalidation request when device is disconnected

For those endpoint devices connect to system via hotplug capable ports, users could request a hot reset to the device by flapping device's link through setting the slot's link control register, as pciehp_ist() DLLSC interrupt sequence response, pciehp will unload the device driver and then power it off. thus cause an IOMMU device-TLB invalidation (Intel VT-d spec, or ATS Invalidation in PCIe spec r6.1) request for non-existence target device to be sent and deadly loop to retry that request after ITE fault triggered in interrupt context.

That would cause following continuous hard lockup warning and system hang

[ 4211.433662] pcieport 0000:17:01.0: pciehp: Slot(108): Link Down [ 4211.433664] pcieport 0000:17:01.0: pciehp: Slot(108): Card not present [ 4223.822591] NMI watchdog: Watchdog detected hard LOCKUP on cpu 144 [ 4223.822622] CPU: 144 PID: 1422 Comm: irq/57-pciehp Kdump: loaded Tainted: G S OE kernel version xxxx [ 4223.822623] Hardware name: vendorname xxxx 666-106, BIOS 01.01.02.03.01 05/15/2023 [ 4223.822623] RIP: 0010:qi_submit_sync+0x2c0/0x490 [ 4223.822624] Code: 48 be 00 00 00 00 00 08 00 00 49 85 74 24 20 0f 95 c1 48 8b 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 0 74 17 49 8b 04 24 8b 80 80 00 00 00 89 c2 d3 fa 41 39 [ 4223.822624] RSP: 0018:ffffc4f074f0bbb8 EFLAGS: 00000093 [ 4223.822625] RAX: ffffc4f040059000 RBX: 0000000000000014 RCX: 0000000000000005 [ 4223.822625] RDX: ffff9f3841315800 RSI: 0000000000000000 RDI: ffff9f38401a8340 [ 4223.822625] RBP: ffff9f38401a8340 R08: ffffc4f074f0bc00 R09: 0000000000000000 [ 4223.822626] R10: 0000000000000010 R11: 0000000000000018 R12: ffff9f384005e200 [ 4223.822626] R13: 0000000000000004 R14: 0000000000000046 R15: 0000000000000004 [ 4223.822626] FS: 0000000000000000(0000) GS:ffffa237ae400000(0000) knlGS:0000000000000000 [ 4223.822627] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 4223.822627] CR2: 00007ffe86515d80 CR3: 000002fd3000a001 CR4: 0000000000770ee0 [ 4223.822627] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 4223.822628] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400 [ 4223.822628] PKRU: 55555554 [ 4223.822628] Call Trace: [ 4223.822628] qi_flush_dev_iotlb+0xb1/0xd0 [ 4223.822628] __dmar_remove_one_dev_info+0x224/0x250 [ 4223.822629] dmar_remove_one_dev_info+0x3e/0x50 [ 4223.822629] intel_iommu_release_device+0x1f/0x30 [ 4223.822629] iommu_release_device+0x33/0x60 [ 4223.822629] iommu_bus_notifier+0x7f/0x90 [ 4223.822630] blocking_notifier_call_chain+0x60/0x90 [ 4223.822630] device_del+0x2e5/0x420 [ 4223.822630] pci_remove_bus_device+0x70/0x110 [ 4223.822630] pciehp_unconfigure_device+0x7c/0x130 [ 4223.822631] pciehp_disable_slot+0x6b/0x100 [ 4223.822631] pciehp_handle_presence_or_link_change+0xd8/0x320 [ 4223.822631] pciehp_ist+0x176/0x180 [ 4223.822631] ? irq_finalize_oneshot.part.50+0x110/0x110 [ 4223.822632] irq_thread_fn+0x19/0x50 [ 4223.822632] irq_thread+0x104/0x190 [ 4223.822632] ? irq_forced_thread_fn+0x90/0x90 [ 4223.822632] ? irq_thread_check_affinity+0xe0/0xe0 [ 4223.822633] kthread+0x114/0x130 [ 4223.822633] ? __kthread_cancel_work+0x40/0x40 [ 4223.822633] ret_from_fork+0x1f/0x30 [ 4223.822633] Kernel panic - not syncing: Hard LOCKUP [ 4223.822634] CPU: 144 PID: 1422 Comm: irq/57-pciehp Kdump: loaded Tainted: G S OE kernel version xxxx [ 4223.822634] Hardware name: vendorname xxxx 666-106, BIOS 01.01.02.03.01 05/15/2023 [ 4223.822634] Call Trace: [ 4223.822634] [ 4223.822635] dump_stack+0x6d/0x88 [ 4223.822635] panic+0x101/0x2d0 [ 4223.822635] ? ret_from_fork+0x11/0x30 [ 4223.822635] nmi_panic.cold.14+0xc/0xc [ 4223.822636] watchdog_overflow_callback.cold.8+0x6d/0x81 [ 4223.822636] __perf_event_overflow+0x4f/0xf0 [ 4223.822636] handle_pmi_common ---truncated---

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

April 17, 2024

Last Modified

May 12, 2026

References (16)

Patch Availability(22)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (6.8.0-35.35) @ noble2026-05-22ubuntu
ubuntulinux-tools-gcp (6.8.0-1008.9) @ noble2026-05-22ubuntu
ubuntulinux-tools-oem-24.04a (6.8.0-1006.6+1) @ noble2026-05-22ubuntu
ubuntulinux-tools-gke (6.8.0-1004.7) @ noble2026-05-22ubuntu
ubuntulinux-tools-kvm (5.15.0.1060.56) @ jammy2026-05-22ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1061.57) @ jammy2026-05-22ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1066.64) @ jammy2026-05-22ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.110.120~20.04.1) @ focal2026-05-22ubuntu
ubuntulinux-tools-nvidia-lowlatency (5.15.0.1058.58) @ jammy2026-05-22ubuntu
ubuntulinux-tools-aws-lts-22.04 (5.15.0.1063.63) @ jammy2026-05-22ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1058.64~20.04.1) @ focal2026-05-22ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.113.123~20.04.1) @ focal2026-05-22ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1054 (5.4.0-1054.58) @ focal2026-05-22ubuntu
ubuntulinux-tools-ibm-edge (5.15.0.1057.60~20.04.1) @ focal2026-05-22ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.200.196) @ focal2026-05-22ubuntu
ubuntulinux-tools-oracle-64k (6.8.0-1006.6) @ noble2026-05-22ubuntu
ubuntulinux-tools-oracle-edge (5.4.0.1134.143~18.04.1) @ bionic2026-05-22ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1058.56) @ jammy2026-05-22ubuntu
ubuntulinux-tools-bluefield (5.4.0.1094.90) @ focal2026-05-22ubuntu
ubuntulinux-tools-iot (5.4.0.1044.42) @ focal2026-05-22ubuntu
ubuntulinux-tools-raspi2-hwe-18.04-edge (5.4.0.1119.149) @ focal2026-05-22ubuntu
linuxKernel @ 5.10.214—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(21)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 41× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 139 total refreshes for this CVE.

  1. 2026-08-06 13:45 UTCEPSS rescore
  2. 2026-08-05 19:15 UTCEPSS rescore
  3. 2026-08-04 15:08 UTCEPSS rescore
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  19. 2026-07-23 02:35 UTCEG score recompute
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  1. 2026-07-19 02:28 UTCEPSS rescore
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  14. 2026-07-11 07:41 UTCOSV refresh
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  23. 2026-07-05 02:29 UTCEPSS rescore
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  26. 2026-06-29 14:05 UTCEPSS rescore
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  39. 2026-06-22 14:26 UTCOSV refresh
  40. 2026-06-22 14:24 UTCEPSS rescore
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  68. 2026-06-04 23:09 UTCOSV refresh
  69. 2026-06-04 13:11 UTCEPSS rescore
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  75. 2026-05-31 22:30 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2024-26891?
CVE-2024-26891 is a medium vulnerability published on April 17, 2024. In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Don't issue ATS Invalidation request when device is disconnected For those endpoint devices connect to system via hotplug capable ports, users could request a hot reset to the device by flapping device's link through…
When was CVE-2024-26891 disclosed?
CVE-2024-26891 was first published in the National Vulnerability Database on April 17, 2024, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-26891 actively exploited?
CVE-2024-26891 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 86.0% of all scored CVEs.
What is the CVSS score of CVE-2024-26891?
CVE-2024-26891 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2024-26891?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-26891, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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