CVE - CVE-2022-26363

CVE-ID
CVE-2022-26363	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:http://xenbits.xen.org/xsa/advisory-402.html DEBIAN:DSA-5184 URL:https://www.debian.org/security/2022/dsa-5184 FEDORA:FEDORA-2022-0142d562ca URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI/ FEDORA:FEDORA-2022-2c9f8224f8 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/ GENTOO:GLSA-202208-23 URL:https://security.gentoo.org/glsa/202208-23 MISC:https://xenbits.xenproject.org/xsa/advisory-402.txt URL:https://xenbits.xenproject.org/xsa/advisory-402.txt MLIST:[oss-security] 20220609 Xen Security Advisory 402 v4 (CVE-2022-26363,CVE-2022-26364) - x86 pv: Insufficient care with non-coherent mappings URL:http://www.openwall.com/lists/oss-security/2022/06/09/4
Assigning CNA
Xen Project
Date Record Created
20220302	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20220302)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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