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

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Summary

CVECVE-2024-27437
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-04-05 09:15:09 UTC
Updated2026-05-12 12:16:33 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 26389925d6c2126fb777821a0a983adca7ee6351 git Not specified
CNA Linux Linux affected 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 561d5e1998d58b54ce2bbbb3e843b669aa0b3db5 git Not specified
CNA Linux Linux affected 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 b7a2f0955ffceffadfe098b40b50307431f45438 git Not specified
CNA Linux Linux affected 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 139dfcc4d723ab13469881200c7d80f49d776060 git Not specified
CNA Linux Linux affected 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 2a4a666c45107206605b7b5bc20545f8aabc4fa2 git Not specified
CNA Linux Linux affected 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 3b3491ad0f80d913e7d255941d4470f4a4d9bfda git Not specified
CNA Linux Linux affected 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 bf0bc84a20e6109ab07d5dc072067bd01eb931ec git Not specified
CNA Linux Linux affected 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 fe9a7082684eb059b925c535682e68c34d487d43 git Not specified
CNA Linux Linux affected 3.6 Not specified
CNA Linux Linux unaffected 3.6 semver Not specified
CNA Linux Linux unaffected 5.4.274 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.215 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.154 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.84 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.24 6.6.* semver Not specified
CNA Linux Linux unaffected 6.7.12 6.7.* semver Not specified
CNA Linux Linux unaffected 6.8.3 6.8.* semver Not specified
CNA Linux Linux unaffected 6.9 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified

References

ReferenceSourceLinkTags
lists.debian.org/debian-lts-announce/2024/06/msg00017.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List
git.kernel.org/stable/c/3b3491ad0f80d913e7d255941d4470f4a4d9bfda af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/fe9a7082684eb059b925c535682e68c34d487d43 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/561d5e1998d58b54ce2bbbb3e843b669aa0b3db5 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/bf0bc84a20e6109ab07d5dc072067bd01eb931ec af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/2a4a666c45107206605b7b5bc20545f8aabc4fa2 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/b7a2f0955ffceffadfe098b40b50307431f45438 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/139dfcc4d723ab13469881200c7d80f49d776060 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/26389925d6c2126fb777821a0a983adca7ee6351 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 6000567 Debian Security Update for linux (DSA 5658-1)
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