CVE-2022-23825

NameCVE-2022-23825
DescriptionAliases in the branch predictor may cause some AMD processors to predict the wrong branch type potentially leading to information disclosure.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-5184-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
xen (PTS)buster, buster (security)4.11.4+107-gef32c7afa2-1vulnerable
bullseye4.14.6-1fixed
bullseye (security)4.14.5+94-ge49571868d-1fixed
bookworm4.17.3+10-g091466ba55-1~deb12u1fixed
trixie4.17.3+10-g091466ba55-1fixed
sid4.17.3+10-g091466ba55-1.1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
xensourcebuster(unfixed)end-of-life
xensourcebullseye4.14.5+24-g87d90d511c-1DSA-5184-1
xensource(unstable)4.16.2-1

Notes

[bullseye] - xen <postponed> (Fix along in next DSA)
[buster] - xen <end-of-life> (DSA 4677-1)
https://comsec.ethz.ch/research/microarch/retbleed/
https://comsec.ethz.ch/wp-content/files/retbleed_addendum_sec22.pdf
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1037
https://xenbits.xen.org/xsa/advisory-407.html
Followup (which did not got a new CVE allocated by AMD):
https://xenbits.xen.org/xsa/advisory-422.html
https://www.amd.com/system/files/documents/technical-guidance-for-mitigating-branch-type-confusion.pdf

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