| Name | CVE-2022-23825 |
| Description | Aliases in the branch predictor may cause some AMD processors to predict the wrong branch type potentially leading to information disclosure. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-5184-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| xen (PTS) | buster, buster (security) | 4.11.4+107-gef32c7afa2-1 | vulnerable |
| bullseye (security), bullseye | 4.14.5+94-ge49571868d-1 | fixed |
| bookworm | 4.17.1+2-gb773c48e36-1 | fixed |
| sid, trixie | 4.17.2-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| xen | source | buster | (unfixed) | end-of-life | | |
| xen | source | bullseye | 4.14.5+24-g87d90d511c-1 | | DSA-5184-1 | |
| xen | source | (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