CVE-2023-21400

NameCVE-2023-21400
DescriptionIn multiple functions of io_uring.c, there is a possible kernel memory corruption due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. User interaction is not needed for exploitation.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3623-1, DSA-5480-1, ELA-991-1

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
buster4.19.249-2fixed
buster (security)4.19.304-1fixed
bullseye5.10.209-2fixed
bullseye (security)5.10.205-2fixed
bookworm6.1.76-1fixed
bookworm (security)6.1.85-1fixed
trixie6.6.15-2fixed
sid6.7.9-2fixed
linux-5.10 (PTS)jessie, jessie (lts)5.10.209-2~deb8u1fixed
stretch (lts), stretch5.10.209-2~deb9u1fixed
buster (security)5.10.209-2~deb10u1fixed

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
linuxsourcebuster(not affected)
linuxsourcebullseye5.10.191-1DSA-5480-1
linuxsource(unstable)5.18.2-1
linux-5.10sourcejessie5.10.197-1~deb8u1ELA-991-1
linux-5.10sourcestretch5.10.197-1~deb9u1ELA-991-1
linux-5.10sourcebuster5.10.197-1~deb10u1DLA-3623-1

Notes

[buster] - linux <not-affected> (Vulnerable code not present)
https://source.android.com/security/bulletin/pixel/2023-07-01
https://yanglingxi1993.github.io/dirty_pagetable/dirty_pagetable.html
https://www.openwall.com/lists/oss-security/2023/07/14/2
https://www.openwall.com/lists/oss-security/2023/07/25/9
https://twitter.com/VAR10CK/status/1683303642173153280

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