Vulnerability in Xen
CVE-2022-42331
x86: speculative vulnerability in 32bit SYSCALL path Due to an oversight in the very original Spectre/Meltdown security work (XSA-254), one entrypath performs its speculation-safety actions too late. In some configurations, there is an unprotected RET instruction which can be attacked with a variety of speculative attacks.
EPSS: 0.003 (19.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Xen — versions consult Xen advisory XSA-429
- Fedoraproject Fedora — versions 37, 38
Public proof-of-concept exploits
References
- security@xen.org (Vendor Advisory)
- security@xen.org (mailing-list, Mailing List, Third Party Advisory)
- security@xen.org (Vendor Advisory)
- security@xen.org (vendor-advisory, Mailing List, Third Party Advisory)
- security@xen.org (vendor-advisory, Mailing List, Third Party Advisory)
- security@xen.org (vendor-advisory, Third Party Advisory)
- security@xen.org
Frequently asked questions
- What is CVE-2022-42331?
- CVE-2022-42331 is a medium-severity vulnerability in Xen. CVSS score: 5.5/10. Published 2023-03-21.
- How severe is CVE-2022-42331?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2022-42331 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.