CVE-2023-46838

NameCVE-2023-46838
DescriptionTransmit requests in Xen's virtual network protocol can consist of multiple parts. While not really useful, except for the initial part any of them may be of zero length, i.e. carry no data at all. Besides a certain initial portion of the to be transferred data, these parts are directly translated into what Linux calls SKB fragments. Such converted request parts can, when for a particular SKB they are all of length zero, lead to a de-reference of NULL in core networking code.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)buster4.19.249-2vulnerable
buster (security)4.19.304-1vulnerable
bullseye5.10.209-2fixed
bullseye (security)5.10.205-2vulnerable
bookworm6.1.76-1fixed
bookworm (security)6.1.69-1vulnerable
trixie, sid6.6.15-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcebullseye5.10.209-1
linuxsourcebookworm6.1.76-1
linuxsource(unstable)6.6.15-1

Notes

https://xenbits.xen.org/xsa/advisory-448.html
https://git.kernel.org/linus/c7ec4f2d684e17d69bbdd7c4324db0ef5daac26a

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