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. https://xenbits.xenproject.org/xsa/advisory-408.txt http://xenbits.xen.org/xsa/advisory-408.html http://www.openwall.com/lists/oss-security/2022/07/26/2 http://www.openwall.com/lists/oss-security/2022/07/26/3
Created xen tracking bugs for this issue: Affects: fedora-all [bug 2112223]
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.