CVE-2022-26362

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.

Link	Resource
http://www.openwall.com/lists/oss-security/2022/06/09/3	Mailing List Third Party Advisory
https://xenbits.xenproject.org/xsa/advisory-401.txt	Vendor Advisory
http://xenbits.xen.org/xsa/advisory-401.html	Patch Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI/	Mailing List Third Party Advisory
http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.html	Third Party Advisory VDB Entry
https://www.debian.org/security/2022/dsa-5184	Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/	Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202208-23	Third Party Advisory

Configuration 1

cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

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Published : 2022-06-09 05:15

Updated : 2022-08-24 06:35

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NVD link : CVE-2022-26362

Mitre link : CVE-2022-26362

No products.

CWE-362