Resource Injection Affecting kernel-debug-core package, versions *
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGCORE-6579175
- published 6 Apr 2024
- disclosed 5 Apr 2024
Introduced: 5 Apr 2024
CVE-2024-27437 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:8 kernel-debug-core.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-core package and not the kernel-debug-core package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2024-27437
- 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
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html