CVE-2022-33742

NameCVE-2022-33742
DescriptionLinux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend (CVE-2022-26365, CVE-2022-33740). Additionally the granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend (CVE-2022-33741, CVE-2022-33742).
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
ReferencesDSA-5191-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)buster4.19.235-1vulnerable
buster (security)4.19.249-2vulnerable
bullseye5.10.127-1vulnerable
bullseye (security)5.10.127-2fixed
bookworm, sid5.18.14-1fixed
xen (PTS)buster, buster (security)4.11.4+107-gef32c7afa2-1vulnerable
bullseye4.14.4+74-gd7b22226b5-1vulnerable
bullseye (security)4.14.5+24-g87d90d511c-1vulnerable
bookworm, sid4.16.1-1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcebullseye5.10.127-2DSA-5191-1
linuxsource(unstable)5.18.14-1
xensourcestretch(unfixed)end-of-life
xensourcebuster(unfixed)end-of-life
xensource(unstable)(unfixed)

Notes

[bullseye] - xen <ignored> (Too intrusive too backport)
[buster] - xen <end-of-life> (DSA 4677-1)
[stretch] - xen <end-of-life> (DSA 4602-1)
https://xenbits.xen.org/xsa/advisory-403.html

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