Medium 5.5Published Apr 5, 2024

CVE-2024-27437vfio/pci: Disable auto-enable of exclusive INTx IRQ

Updated under an hour ago (Oct 26, 2026, 10:10 PM ET)

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It affects Linux and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Disable auto-enable of exclusive INTx IRQ Currently for devices requiring masking at the irqchip for INTx, ie. devices without DisINTx support, the IRQ is enabled in request_irq() and subsequently disabled as necessary to align with the masked status flag. This presents a window where the interrupt could fire between these events, resulting in the IRQ incrementing the disable depth twice. This would be unrecoverable for a user since the masked flag prevents nested enables through vfio. Instead, invert the logic using IRQF_NO_AUTOEN such that exclusive INTx is never auto-enabled, then unmask as required.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 before 26389925d6c2126fb777821a0a983adca7ee6351; from 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 before 561d5e1998d58b54ce2bbbb3e843b669aa0b3db5; from 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 before b7a2f0955ffceffadfe098b40b50307431f45438; from 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 before 139dfcc4d723ab13469881200c7d80f49d776060; 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 builds before 2a4a666c45107206605b7b5bc20545f8aabc4fa2; 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 builds before 3b3491ad0f80d913e7d255941d4470f4a4d9bfda; from 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 before bf0bc84a20e6109ab07d5dc072067bd01eb931ec; from 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 before fe9a7082684eb059b925c535682e68c34d487d43	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	before V1.1.1	CISA ADP
linux linux_kernel linux:linux_kernel	from 3.6 before 6.1.84; from 6.2 before 6.6.24; from 6.7 before 6.7.12; from 6.8 before 6.8.3; from 6.8.4 through 6.8.12	NVD
debian debian_linux debian:debian_linux	10.0	NVD

References

References

https://git.kernel.org/stable/c/26389925d6c2126fb777821a0a983adca7ee6351	patch
https://git.kernel.org/stable/c/561d5e1998d58b54ce2bbbb3e843b669aa0b3db5	patch
https://git.kernel.org/stable/c/b7a2f0955ffceffadfe098b40b50307431f45438	patch
https://git.kernel.org/stable/c/139dfcc4d723ab13469881200c7d80f49d776060	patch
https://git.kernel.org/stable/c/2a4a666c45107206605b7b5bc20545f8aabc4fa2	patch
https://git.kernel.org/stable/c/3b3491ad0f80d913e7d255941d4470f4a4d9bfda	patch
https://git.kernel.org/stable/c/bf0bc84a20e6109ab07d5dc072067bd01eb931ec	patch
https://git.kernel.org/stable/c/fe9a7082684eb059b925c535682e68c34d487d43	patch
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html	mailing-list
https://cert-portal.siemens.com/productcert/html/ssa-265688.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.