CVE-2022-33744

NameCVE-2022-33744
DescriptionArm guests can cause Dom0 DoS via PV devices When mapping pages of guests on Arm, dom0 is using an rbtree to keep track of the foreign mappings. Updating of that rbtree is not always done completely with the related lock held, resulting in a small race window, which can be used by unprivileged guests via PV devices to cause inconsistencies of the rbtree. These inconsistencies can lead to Denial of Service (DoS) of dom0, e.g. by causing crashes or the inability to perform further mappings of other guests' memory pages.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3131-1, DSA-5191-1, ELA-661-1, ELA-696-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)jessie, jessie (lts)3.16.84-1vulnerable
stretch (security)4.9.320-2vulnerable
stretch (lts), stretch4.9.320-3vulnerable
buster4.19.249-2vulnerable
buster (security)4.19.304-1fixed
bullseye5.10.209-2fixed
bullseye (security)5.10.216-1fixed
bookworm6.1.76-1fixed
bookworm (security)6.1.90-1fixed
trixie6.7.12-1fixed
sid6.8.9-1fixed
linux-4.19 (PTS)jessie, jessie (lts)4.19.304-1~deb8u1fixed
stretch (security)4.19.232-1~deb9u1vulnerable
stretch (lts), stretch4.19.304-1~deb9u1fixed
linux-5.10 (PTS)stretch (lts), stretch5.10.216-1~deb9u1fixed
xen (PTS)jessie, jessie (lts)4.4.4lts5-0+deb8u1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcejessie(unfixed)end-of-life
linuxsourcestretch(unfixed)end-of-life
linuxsourcebuster4.19.260-1DLA-3131-1
linuxsourcebullseye5.10.127-2DSA-5191-1
linuxsource(unstable)5.18.14-1
linux-4.19sourcejessie4.19.260-1~deb8u1ELA-696-1
linux-4.19sourcestretch4.19.260-1~deb9u1ELA-696-1
linux-5.10sourcestretch5.10.127-2~deb9u1ELA-661-1
xensourcejessie(unfixed)end-of-life

Notes

https://xenbits.xen.org/xsa/advisory-406.html

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