Vulnerability in Xen
CVE-2022-33748
lock order inversion in transitive grant copy handling As part of XSA-226 a missing cleanup call was inserted on an error handling path. While doing so, locking requirements were not paid attention to. As a result two cooperating guests granting each other transitive grants can cause locks to be acquired nested within one another, but in respectively opposite order. With suitable timing between the involved grant copy operations this may result in the locking up of a CPU.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (16.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 16.4% 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-411
- Debian Linux — versions 11.0
- Fedoraproject Fedora — versions 35, 36, 37
Weakness classification (CWE)
References
- xenbits.xenproject.org/xsa/advisory-411.txt (Patch, Mitigation, Vendor Advisory)
- xenbits.xen.org/xsa/advisory-411.html (Patch, Mitigation, Vendor Advisory)
- www.openwall.com/lists/oss-security/2022/10/11/2 (mailing-list, Patch, Mailing List, Third Party Advisory, Mitigation)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-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)
- security.gentoo.org/glsa/202402-07 (vendor-advisory)
Frequently asked questions
- What is CVE-2022-33748?
- CVE-2022-33748 is a medium-severity vulnerability in Xen, classified under Improper Handling of Exceptional Conditions. CVSS score: 5.6/10. Published 2022-10-11.
- How severe is CVE-2022-33748?
- Medium severity. CVSS v3 base score is 5.6 out of 10.