{"id":"CVE-2024-27437","title":"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 en…","summary":"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 en…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 3.6, < 6.1.84","linux_kernel >= 6.2, < 6.6.24","linux_kernel >= 6.7, < 6.7.12","linux_kernel >= 6.8, < 6.8.3","linux_kernel >= 6.8.4, <= 6.8.12","debian_linux = 10.0"],"patched":["linux_kernel 6.8.3"],"published":"2024-04-05","updated":"2026-10-15","sourceUpdated":"2026-10-15T01:17:41.450","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-27437","references":[{"url":"https://git.kernel.org/stable/c/139dfcc4d723ab13469881200c7d80f49d776060","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/26389925d6c2126fb777821a0a983adca7ee6351","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2a4a666c45107206605b7b5bc20545f8aabc4fa2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3b3491ad0f80d913e7d255941d4470f4a4d9bfda","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/561d5e1998d58b54ce2bbbb3e843b669aa0b3db5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b7a2f0955ffceffadfe098b40b50307431f45438","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bf0bc84a20e6109ab07d5dc072067bd01eb931ec","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fe9a7082684eb059b925c535682e68c34d487d43","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/139dfcc4d723ab13469881200c7d80f49d776060","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/26389925d6c2126fb777821a0a983adca7ee6351","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/2a4a666c45107206605b7b5bc20545f8aabc4fa2","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/3b3491ad0f80d913e7d255941d4470f4a4d9bfda","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/561d5e1998d58b54ce2bbbb3e843b669aa0b3db5","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/b7a2f0955ffceffadfe098b40b50307431f45438","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/bf0bc84a20e6109ab07d5dc072067bd01eb931ec","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/fe9a7082684eb059b925c535682e68c34d487d43","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.0024,"epssPercentile":0.15019,"ingestedAt":"2026-10-15T03:30:12.649Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2024-04-05T13:39:05.639772Z"},"slug":"CVE-2024-27437","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `linux_kernel >= 3.6, < 6.1.84`\n- `linux_kernel >= 6.2, < 6.6.24`\n- `linux_kernel >= 6.7, < 6.7.12`\n- `linux_kernel >= 6.8, < 6.8.3`\n- `linux_kernel >= 6.8.4, <= 6.8.12`\n- `debian_linux = 10.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.8.3`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}