CVE-2024-27437
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-27437
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-27437.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-27437
- Downstream
- Related
- Published
- 2024-04-05T09:15:09Z
- Modified
- 2025-08-09T19:01:28Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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 IRQFNOAUTOEN such that exclusive INTx is never auto-enabled, then unmask as required.
- References
-
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://git.kernel.org/stable/c/139dfcc4d723ab13469881200c7d80f49d776060
- https://git.kernel.org/stable/c/26389925d6c2126fb777821a0a983adca7ee6351
- https://git.kernel.org/stable/c/2a4a666c45107206605b7b5bc20545f8aabc4fa2
- https://git.kernel.org/stable/c/3b3491ad0f80d913e7d255941d4470f4a4d9bfda
- https://git.kernel.org/stable/c/561d5e1998d58b54ce2bbbb3e843b669aa0b3db5
- https://git.kernel.org/stable/c/b7a2f0955ffceffadfe098b40b50307431f45438
- https://git.kernel.org/stable/c/bf0bc84a20e6109ab07d5dc072067bd01eb931ec
- https://git.kernel.org/stable/c/fe9a7082684eb059b925c535682e68c34d487d43