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

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

No data.

No data.

No data.

References
Link Providers
https://git.kernel.org/stable/c/07afdfd8a68f9eea8db0ddc4626c874f29d2ac5e cve-icon cve-icon
https://git.kernel.org/stable/c/09452c8fcbd7817c06e8e3212d99b45917e603a5 cve-icon cve-icon
https://git.kernel.org/stable/c/0f8d8f9c2173a541812dd750529f4a415117eb29 cve-icon cve-icon
https://git.kernel.org/stable/c/62d4e43a569b67929eb3319780be5359694c8086 cve-icon cve-icon
https://git.kernel.org/stable/c/675daf435e9f8e5a5eab140a9864dfad6668b375 cve-icon cve-icon
https://git.kernel.org/stable/c/7932db06c82c5b2f42a4d1a849d97dba9ce4a362 cve-icon cve-icon
https://git.kernel.org/stable/c/cc5838f19d39a5fef04c468199699d2a4578be3a cve-icon cve-icon
https://git.kernel.org/stable/c/d6bedd6acc0bcb1e7e010bc046032e47f08d379f cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html cve-icon
https://lore.kernel.org/linux-cve-announce/2024040551-CVE-2024-26813-b9e8@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2024-26813 cve-icon
https://www.cve.org/CVERecord?id=CVE-2024-26813 cve-icon
History

Fri, 22 Nov 2024 12:00:00 +0000

Type Values Removed Values Added
References

Wed, 06 Nov 2024 20:15:00 +0000

Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 12 Sep 2024 08:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 11 Sep 2024 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-04-05T08:24:43.279Z

Updated: 2024-11-05T09:16:18.277Z

Reserved: 2024-02-19T14:20:24.180Z

Link: CVE-2024-26813

cve-icon Vulnrichment

Updated: 2024-08-02T00:14:13.615Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2024-04-05T09:15:09.340

Modified: 2024-11-21T09:03:08.057

Link: CVE-2024-26813

cve-icon Redhat

Severity : Low

Publid Date: 2024-04-05T00:00:00Z

Links: CVE-2024-26813 - Bugzilla