Vulnerability in Xen
CVE-2022-23035
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.
EPSS: 0.004 (27.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Xen — versions consult Xen advisory XSA-395
- Debian Debian_linux — versions 11.0
- Fedoraproject Fedora — versions 34
Weakness classification (CWE)
References
- security@xen.org (x_refsource_MISC, Vendor Advisory)
- security@xen.org (mailing-list, x_refsource_MLIST, Patch, Mailing List, Third Party Advisory)
- security@xen.org (x_refsource_FEDORA, vendor-advisory)
- security@xen.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- security@xen.org (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
Frequently asked questions
- What is CVE-2022-23035?
- CVE-2022-23035 is a medium-severity vulnerability in Xen, classified under Incomplete Cleanup. CVSS score: 4.6/10. Published 2022-01-25.
- How severe is CVE-2022-23035?
- Medium severity. CVSS v3 base score is 4.6 out of 10.