CVE-2022-33745

3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 0.3%

exploitation probability

0.3%top 77% of all CVEs

observed exploitation

nono source reports it

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 products

Xen · xen

References

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HUFIMNGYP5VQAA6KE3T2I5GW6UP6F7BS/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MYI3OMJ7RIZNL3C6GUWNANNPEUUID6FM/https://www.debian.org/security/2022/dsa-5272 https://xenbits.xenproject.org/xsa/advisory-408.txt http://www.openwall.com/lists/oss-security/2022/07/26/2 http://www.openwall.com/lists/oss-security/2022/07/26/3 http://xenbits.xen.org/xsa/advisory-408.html