Race Condition Affecting kernel-debuginfo package, versions <0:4.14.219-161.340.amzn2
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Test your applications- Snyk ID SNYK-AMZN2-KERNELDEBUGINFO-1694621
- published 27 Sep 2021
- disclosed 11 Dec 2020
How to fix?
Upgrade Amazon-Linux:2 kernel-debuginfo to version 0:4.14.219-161.340.amzn2 or higher.
This issue was patched in ALAS2-2021-1600.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debuginfo package and not the kernel-debuginfo package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
A use-after-free flaw was found in kernel/trace/ring_buffer.c in Linux kernel (before 5.10-rc1). There was a race problem in trace_open and resize of cpu buffer running parallely on different cpus, may cause a denial of service problem (DOS). This flaw could even allow a local attacker with special user privilege to a kernel information leak threat.
References
- https://security.netapp.com/advisory/ntap-20210521-0008/
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27825
- https://www.debian.org/security/2021/dsa-4843
- https://bugzilla.redhat.com/show_bug.cgi?id=1905155
- https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html