CVE-2022-23035

Description

Insufficient cleanup of passed-through device IRQs The management of IRQs associated with physical devices exposed to x86 HVM guests involves an iterative operation in particular when cleaning up after the guest's use of the device. In the case where an interrupt is not quiescent yet at the time this cleanup gets invoked, the cleanup attempt may be scheduled to be retried. When multiple interrupts are involved, this scheduling of a retry may get erroneously skipped. At the same time pointers may get cleared (resulting in a de-reference of NULL) and freed (resulting in a use-after-free), while other code would continue to assume them to be valid.

How to fix CVE-2022-23035

To remediate CVE-2022-23035, upgrade the affected package to a fixed version below.

• —upgrade to 4.13.4-r3 or later
• —upgrade to 4.14.4+74-gd7b22226b5-1 or later

Is CVE-2022-23035 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 4.13.4-r3
• from 0, < 4.14.4+74-gd7b22226b5-1

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2022-23035
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2022-23035