CVE-2021-38300

NameCVE-2021-38300
Descriptionarch/mips/net/bpf_jit.c in the Linux kernel before 5.4.10 can generate undesirable machine code when transforming unprivileged cBPF programs, allowing execution of arbitrary code within the kernel context. This occurs because conditional branches can exceed the 128 KB limit of the MIPS architecture.
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)
ReferencesDLA-2941-1, DSA-5096-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)buster4.19.249-2fixed
buster (security)4.19.260-1fixed
bullseye5.10.140-1fixed
bullseye (security)5.10.149-2fixed
bookworm6.0.10-1fixed
sid6.0.10-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcebuster4.19.232-1DSA-5096-1
linuxsourcebullseye5.10.70-1
linuxsource(unstable)5.14.6-1
linux-4.19sourcestretch4.19.232-1~deb9u1DLA-2941-1

Notes

[stretch] - linux <ignored> (mips not supported in LTS)
https://www.openwall.com/lists/oss-security/2021/09/15/5
https://lore.kernel.org/bpf/20210915160437.4080-1-piotras@gmail.com/

Search for package or bug name: Reporting problems