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Debian: CVE-2022-33745: xen -- security update

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Debian: CVE-2022-33745: xen -- security update

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
07/26/2022
Created
11/09/2022
Added
11/08/2022
Modified
11/09/2022

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.

Solution(s)

  • debian-upgrade-xen

References

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