CVEvulnerability
CVE-2022-33745
8.8 HIGH
Official page ↗
- Status
- Modified
- Published
- 2022-07-26
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 8.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Description
insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary.
Affected configurations
• xen xen
• debian debian linux 11.0
• fedoraproject fedora 35
• fedoraproject fedora 36
References
- http://www.openwall.com/lists/oss-security/2022/07/26/2 Mailing List, Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/07/26/3 Mailing List, Patch, Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-408.html Patch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HUFIMNGYP5VQAA6KE3T2I5GW6UP6F7BS/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MYI3OMJ7RIZNL3C6GUWNANNPEUUID6FM/ lists.fedoraproject.org
- https://www.debian.org/security/2022/dsa-5272 Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-408.txt Vendor Advisory
- http://www.openwall.com/lists/oss-security/2022/07/26/2 Mailing List, Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/07/26/3 Mailing List, Patch, Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-408.html Patch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HUFIMNGYP5VQAA6KE3T2I5GW6UP6F7BS/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MYI3OMJ7RIZNL3C6GUWNANNPEUUID6FM/ lists.fedoraproject.org
- https://www.debian.org/security/2022/dsa-5272 Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-408.txt Vendor Advisory