🛡️ CVE-2022-26363
🟡 CVSS 6.7 — Medium ✅ No Known Exploit NVD
6.7
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, Xen's safety logic doesn't account for CPU-induced cache non-coherency; cases where the CPU can cause the content of the cache to be different to the content in main memory. In such cases, Xen's safety logic can incorrectly conclude that the contents of a page is safe.

Details

Severity MEDIUM
CVSS Score 6.7
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2022-06-09
Updated 2026-06-08
Modified 2024-11-21

Affected Packages

Software From version Fixed in
debian-linux — —
fedora — —
xen — —

References

Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2022/06/09/4
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2022/06/09/4

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