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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (17.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 17.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Xen — versions consult Xen advisory XSA-429
- Fedoraproject Fedora — versions 37, 38
Public proof-of-concept exploits
References
- xenbits.xenproject.org/xsa/advisory-429.txt (Vendor Advisory)
- www.openwall.com/lists/oss-security/2023/03/21/3 (mailing-list, Mailing List, Third Party Advisory)
- xenbits.xen.org/xsa/advisory-429.html (Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List, Third Party Advisory)
- www.debian.org/security/2023/dsa-5378 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/202402-07
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.