CVE - CVE-2024-26812

CVE-ID
CVE-2024-26812	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Create persistent INTx handler A vulnerability exists where the eventfd for INTx signaling can be deconfigured, which unregisters the IRQ handler but still allows eventfds to be signaled with a NULL context through the SET_IRQS ioctl or through unmask irqfd if the device interrupt is pending. Ideally this could be solved with some additional locking; the igate mutex serializes the ioctl and config space accesses, and the interrupt handler is unregistered relative to the trigger, but the irqfd path runs asynchronous to those. The igate mutex cannot be acquired from the atomic context of the eventfd wake function. Disabling the irqfd relative to the eventfd registration is potentially incompatible with existing userspace. As a result, the solution implemented here moves configuration of the INTx interrupt handler to track the lifetime of the INTx context object and irq_type configuration, rather than registration of a particular trigger eventfd. Synchronization is added between the ioctl path and eventfd_signal() wrapper such that the eventfd trigger can be dynamically updated relative to in-flight interrupts or irqfd callbacks.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0e09cf81959d9f12b75ad5c6dd53d237432ed034 URL:https://git.kernel.org/stable/c/0e09cf81959d9f12b75ad5c6dd53d237432ed034 MISC:https://git.kernel.org/stable/c/18c198c96a815c962adc2b9b77909eec0be7df4d URL:https://git.kernel.org/stable/c/18c198c96a815c962adc2b9b77909eec0be7df4d MISC:https://git.kernel.org/stable/c/27d40bf72dd9a6600b76ad05859176ea9a1b4897 URL:https://git.kernel.org/stable/c/27d40bf72dd9a6600b76ad05859176ea9a1b4897 MISC:https://git.kernel.org/stable/c/4c089cefe30924fbe20dd1ee92774ea1f5eca834 URL:https://git.kernel.org/stable/c/4c089cefe30924fbe20dd1ee92774ea1f5eca834 MISC:https://git.kernel.org/stable/c/4cb0d7532126d23145329826c38054b4e9a05e7c URL:https://git.kernel.org/stable/c/4cb0d7532126d23145329826c38054b4e9a05e7c MISC:https://git.kernel.org/stable/c/69276a555c740acfbff13fb5769ee9c92e1c828e URL:https://git.kernel.org/stable/c/69276a555c740acfbff13fb5769ee9c92e1c828e MISC:https://git.kernel.org/stable/c/7d29d4c72c1e196cce6969c98072a272d1a703b3 URL:https://git.kernel.org/stable/c/7d29d4c72c1e196cce6969c98072a272d1a703b3 MISC:https://git.kernel.org/stable/c/b18fa894d615c8527e15d96b76c7448800e13899 URL:https://git.kernel.org/stable/c/b18fa894d615c8527e15d96b76c7448800e13899
Assigning CNA
kernel.org
Date Record Created
20240219	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240219)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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