Vulnerability in Xen
CVE-2022-42319
Xenstore: Guests can cause Xenstore to not free temporary memory When working on a request of a guest, xenstored might need to allocate quite large amounts of memory temporarily. This memory is freed only after the request has been finished completely. A request is regarded to be finished only after the guest has read the response message of the request from the ring page. Thus a guest not reading the response can cause xenstored to not free the temporary memory. This can result in memory shortages causing Denial of Service (DoS) 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 (18.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.6% 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-416
- Debian Linux — versions 11.0
- Fedoraproject Fedora — versions 35, 36, 37
Weakness classification (CWE)
References
- xenbits.xenproject.org/xsa/advisory-416.txt (Patch, Vendor Advisory)
- xenbits.xen.org/xsa/advisory-416.html (Patch, Vendor Advisory)
- www.openwall.com/lists/oss-security/2022/11/01/6 (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-2022-42319?
- CVE-2022-42319 is a medium-severity vulnerability in Xen, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.5/10. Published 2022-11-01.
- How severe is CVE-2022-42319?
- Medium severity. CVSS v3 base score is 6.5 out of 10.