{"id":"CVE-2024-27437","state":"PUBLISHED","title":"vfio/pci: Disable auto-enable of exclusive INTx IRQ","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/pci: Disable auto-enable of exclusive INTx IRQ\n\nCurrently for devices requiring masking at the irqchip for INTx, ie.\ndevices without DisINTx support, the IRQ is enabled in request_irq()\nand subsequently disabled as necessary to align with the masked status\nflag.  This presents a window where the interrupt could fire between\nthese events, resulting in the IRQ incrementing the disable depth twice.\nThis would be unrecoverable for a user since the masked flag prevents\nnested enables through vfio.\n\nInstead, invert the logic using IRQF_NO_AUTOEN such that exclusive INTx\nis never auto-enabled, then unmask as required.","publishedAt":"2024-04-05T08:24:44.561Z","updatedAt":"2026-10-15T00:40:22.214Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"89e1f7d4c66d85f42c3d52ea3866eb10cadf6153","status":"affected","lessThan":"26389925d6c2126fb777821a0a983adca7ee6351","versionType":"git"},{"version":"89e1f7d4c66d85f42c3d52ea3866eb10cadf6153","status":"affected","lessThan":"561d5e1998d58b54ce2bbbb3e843b669aa0b3db5","versionType":"git"},{"version":"89e1f7d4c66d85f42c3d52ea3866eb10cadf6153","status":"affected","lessThan":"b7a2f0955ffceffadfe098b40b50307431f45438","versionType":"git"},{"version":"89e1f7d4c66d85f42c3d52ea3866eb10cadf6153","status":"affected","lessThan":"139dfcc4d723ab13469881200c7d80f49d776060","versionType":"git"},{"version":"89e1f7d4c66d85f42c3d52ea3866eb10cadf6153","status":"affected","lessThan":"2a4a666c45107206605b7b5bc20545f8aabc4fa2","versionType":"git"},{"version":"89e1f7d4c66d85f42c3d52ea3866eb10cadf6153","status":"affected","lessThan":"3b3491ad0f80d913e7d255941d4470f4a4d9bfda","versionType":"git"},{"version":"89e1f7d4c66d85f42c3d52ea3866eb10cadf6153","status":"affected","lessThan":"bf0bc84a20e6109ab07d5dc072067bd01eb931ec","versionType":"git"},{"version":"89e1f7d4c66d85f42c3d52ea3866eb10cadf6153","status":"affected","lessThan":"fe9a7082684eb059b925c535682e68c34d487d43","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/vfio/pci/vfio_pci_intrs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.6","versionType":"semver"},{"version":"5.4.274","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.215","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.154","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.84","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.24","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.12","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8.3","status":"unaffected","lessThanOrEqual":"6.8.*","versionType":"semver"},{"version":"6.9","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/vfio/pci/vfio_pci_intrs.c"]}],"references":["https://git.kernel.org/stable/c/26389925d6c2126fb777821a0a983adca7ee6351","https://git.kernel.org/stable/c/561d5e1998d58b54ce2bbbb3e843b669aa0b3db5","https://git.kernel.org/stable/c/b7a2f0955ffceffadfe098b40b50307431f45438","https://git.kernel.org/stable/c/139dfcc4d723ab13469881200c7d80f49d776060","https://git.kernel.org/stable/c/2a4a666c45107206605b7b5bc20545f8aabc4fa2","https://git.kernel.org/stable/c/3b3491ad0f80d913e7d255941d4470f4a4d9bfda","https://git.kernel.org/stable/c/bf0bc84a20e6109ab07d5dc072067bd01eb931ec","https://git.kernel.org/stable/c/fe9a7082684eb059b925c535682e68c34d487d43","https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html","https://cert-portal.siemens.com/productcert/html/ssa-265688.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:10.607Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/27xxx/CVE-2024-27437.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-27437","state":"PUBLISHED","datePublished":"2024-04-05T08:24:44.561Z","dateUpdated":"2026-10-15T00:40:22.214Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-02-25T13:47:42.687Z"},"containers":{"cna":{"title":"vfio/pci: Disable auto-enable of exclusive INTx IRQ","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/pci: Disable auto-enable of exclusive INTx IRQ\n\nCurrently for devices requiring masking at the irqchip for INTx, ie.\ndevices without DisINTx support, the IRQ is enabled in request_irq()\nand subsequently disabled as necessary to align with the masked status\nflag.  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