CVE - CVE-2022-26362

CVE-ID
CVE-2022-26362	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
x86 pv: Race condition in typeref acquisition 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, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.
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-401.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:http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.html MISC:https://xenbits.xenproject.org/xsa/advisory-401.txt URL:https://xenbits.xenproject.org/xsa/advisory-401.txt MLIST:[oss-security] 20220609 Xen Security Advisory 401 v2 (CVE-2022-26362) - x86 pv: Race condition in typeref acquisition URL:http://www.openwall.com/lists/oss-security/2022/06/09/3
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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