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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2024-26813 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: vfio/platform: Create persistent IRQ handlers The vfio-platform SET_IRQS ioctl currently allows loopback triggering of an interrupt before a signaling eventfd has been configured by the user, which thereby allows a NULL pointer dereference. Rather than register the IRQ relative to a valid trigger, register all IRQs in a disabled state in the device open path. This allows mask operations on the IRQ to nest within the overall enable state governed by a valid eventfd signal. This decouples @masked, protected by the @locked spinlock from @trigger, protected via the @igate mutex. In doing so, it's guaranteed that changes to @trigger cannot race the IRQ handlers because the IRQ handler is synchronously disabled before modifying the trigger, and loopback triggering of the IRQ via ioctl is safe due to serialization with trigger changes via igate. For compatibility, request_irq() failures are maintained to be local to the SET_IRQS ioctl rather than a fatal error in the open device path. This allows, for example, a userspace driver with polling mode support to continue to work regardless of moving the request_irq() call site. This necessarily blocks all SET_IRQS access to the failed index.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/07afdfd8a68f9eea8db0ddc4626c874f29d2ac5e CVE, kernel.org Patch 
https://git.kernel.org/stable/c/09452c8fcbd7817c06e8e3212d99b45917e603a5 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/0f8d8f9c2173a541812dd750529f4a415117eb29 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/62d4e43a569b67929eb3319780be5359694c8086 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/675daf435e9f8e5a5eab140a9864dfad6668b375 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/7932db06c82c5b2f42a4d1a849d97dba9ce4a362 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/cc5838f19d39a5fef04c468199699d2a4578be3a CVE, kernel.org Patch 
https://git.kernel.org/stable/c/d6bedd6acc0bcb1e7e010bc046032e47f08d379f CVE, kernel.org Patch 
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html CVE Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-476 NULL Pointer Dereference cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

9 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2024-26813
NVD Published Date:
04/05/2024
NVD Last Modified:
12/20/2024
Source:
kernel.org