Vulnerability in Xen
CVE-2022-42321
Xenstore: Guests can crash xenstored via exhausting the stack Xenstored is using recursion for some Xenstore operations (e.g. for deleting a sub-tree of Xenstore nodes). With sufficiently deep nesting levels this can result in stack exhaustion on xenstored, leading to a crash of xenstored.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (18.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.5% 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-418
- Debian Linux — versions 11.0
- Fedoraproject Fedora — versions 35, 36, 37
Weakness classification (CWE)
References
- xenbits.xenproject.org/xsa/advisory-418.txt (Patch, Vendor Advisory)
- xenbits.xen.org/xsa/advisory-418.html (Patch, Vendor Advisory)
- www.openwall.com/lists/oss-security/2022/11/01/8 (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2022/dsa-5272 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202402-07 (vendor-advisory)
Frequently asked questions
- What is CVE-2022-42321?
- CVE-2022-42321 is a medium-severity vulnerability in Xen, classified under Uncontrolled Recursion. CVSS score: 6.5/10. Published 2022-11-01.
- How severe is CVE-2022-42321?
- Medium severity. CVSS v3 base score is 6.5 out of 10.