CVE-2021-38300 Affecting kernel package, versions <0:4.14.252-195.481.amzn2
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Test your applications- Snyk ID SNYK-AMZN2-KERNEL-1911272
- published 5 Nov 2021
- disclosed 20 Sep 2021
Introduced: 20 Sep 2021
CVE-2021-38300 Open this link in a new tabHow to fix?
Upgrade Amazon-Linux:2 kernel to version 0:4.14.252-195.481.amzn2 or higher.
This issue was patched in ALAS2-2021-1719.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
arch/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.
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=37cb28ec7d3a36a5bace7063a3dba633ab110f8b
- https://security.netapp.com/advisory/ntap-20211008-0003/
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38300
- http://www.openwall.com/lists/oss-security/2021/09/15/5
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
- https://www.debian.org/security/2022/dsa-5096