Vulnerability in Xen
CVE-2022-42309
Xenstore: Guests can crash xenstored Due to a bug in the fix of XSA-115 a malicious guest can cause xenstored to use a wrong pointer during node creation in an error path, resulting in a crash of xenstored or a memory corruption in xenstored causing further damage. Entering the error path can be controlled by the guest e.g. by exceeding the quota value of maximum nodes per domain.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (18.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.9% 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-414
- Debian Linux — versions 11.0
- Fedoraproject Fedora — versions 35, 36, 37
Weakness classification (CWE)
References
- xenbits.xenproject.org/xsa/advisory-414.txt (Patch, Vendor Advisory)
- xenbits.xen.org/xsa/advisory-414.html (Patch, Vendor Advisory)
- www.openwall.com/lists/oss-security/2022/11/01/4 (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-2022-42309?
- CVE-2022-42309 is a high-severity vulnerability in Xen, classified under Release of Invalid Pointer or Reference. CVSS score: 8.8/10. Published 2022-11-01.
- How severe is CVE-2022-42309?
- High severity. CVSS v3 base score is 8.8 out of 10.