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CVE-2022-26362

UNKNOWN
Published 2022-06-09T12:50:19
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No CVSS data available

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Xen

xen

Affected Versions:

consult Xen advisory XSA-401

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-2mfj-vmvj-q937

Advisory Details

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.

CVSS Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2022-26362
WEB https://lists.fedoraproject.org/archives/list/[email protected]/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI
WEB https://lists.fedoraproject.org/archives/list/[email protected]/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q
WEB https://security.gentoo.org/glsa/202208-23
WEB https://www.debian.org/security/2022/dsa-5184
WEB https://xenbits.xenproject.org/xsa/advisory-401.txt
WEB http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.html
WEB http://www.openwall.com/lists/oss-security/2022/06/09/3
WEB http://xenbits.xen.org/xsa/advisory-401.html

Advisory provided by GitHub Security Advisory Database. Published: June 10, 2022, Modified: June 22, 2022

References

https://xenbits.xenproject.org/xsa/advisory-401.txt
http://xenbits.xen.org/xsa/advisory-401.html
http://www.openwall.com/lists/oss-security/2022/06/09/3
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI/
http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.html
https://www.debian.org/security/2022/dsa-5184
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/
https://security.gentoo.org/glsa/202208-23
Published: 2022-06-09T12:50:19
Last Modified: 2024-08-03T05:03:32.792Z
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