Vulnerability in Xen
CVE-2022-26357
race in VT-d domain ID cleanup Xen domain IDs are up to 15 bits wide. VT-d hardware may allow for only less than 15 bits to hold a domain ID associating a physical device with a particular domain. Therefore internally Xen domain IDs are mapped to the smaller value range. The cleaning up of the housekeeping structures has a race, allowing for VT-d domain IDs to be leaked and flushes to be bypassed.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (15.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.8% 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-399
- Debian Linux — versions 11.0
- Fedoraproject Fedora — versions 34, 35
Weakness classification (CWE)
References
- xenbits.xenproject.org/xsa/advisory-399.txt (Vendor Advisory)
- xenbits.xen.org/xsa/advisory-399.html (Patch, Vendor Advisory)
- www.openwall.com/lists/oss-security/2022/04/05/2 (mailing-list, Patch, Mailing List, Third Party Advisory)
- www.debian.org/security/2022/dsa-5117 (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-2022-26357?
- CVE-2022-26357 is a high-severity vulnerability in Xen, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.0/10. Published 2022-04-05.
- How severe is CVE-2022-26357?
- High severity. CVSS v3 base score is 7.0 out of 10.