CVE-2024-27437

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.

• https://git.kernel.org/stable/c/139dfcc4d723ab13469881200c7d80f49d776060Patch
• https://git.kernel.org/stable/c/26389925d6c2126fb777821a0a983adca7ee6351Patch
• https://git.kernel.org/stable/c/2a4a666c45107206605b7b5bc20545f8aabc4fa2Patch
• https://git.kernel.org/stable/c/3b3491ad0f80d913e7d255941d4470f4a4d9bfdaPatch
• https://git.kernel.org/stable/c/561d5e1998d58b54ce2bbbb3e843b669aa0b3db5Patch
• https://git.kernel.org/stable/c/b7a2f0955ffceffadfe098b40b50307431f45438Patch
• https://git.kernel.org/stable/c/bf0bc84a20e6109ab07d5dc072067bd01eb931ecPatch
• https://git.kernel.org/stable/c/fe9a7082684eb059b925c535682e68c34d487d43Patch
• https://git.kernel.org/stable/c/139dfcc4d723ab13469881200c7d80f49d776060Patch
• https://git.kernel.org/stable/c/26389925d6c2126fb777821a0a983adca7ee6351Patch
• https://git.kernel.org/stable/c/2a4a666c45107206605b7b5bc20545f8aabc4fa2Patch
• https://git.kernel.org/stable/c/3b3491ad0f80d913e7d255941d4470f4a4d9bfdaPatch
• https://git.kernel.org/stable/c/561d5e1998d58b54ce2bbbb3e843b669aa0b3db5Patch
• https://git.kernel.org/stable/c/b7a2f0955ffceffadfe098b40b50307431f45438Patch
• https://git.kernel.org/stable/c/bf0bc84a20e6109ab07d5dc072067bd01eb931ecPatch
• https://git.kernel.org/stable/c/fe9a7082684eb059b925c535682e68c34d487d43Patch
• https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlMailing List
• https://cert-portal.siemens.com/productcert/html/ssa-265688.html

Published

Apr 5, 2024

Last Modified

Jun 17, 2026

Status

Modified

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