Use After Free Affecting kernel-debuginfo package, versions <0:4.14.198-152.320.amzn2
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Test your applications- Snyk ID SNYK-AMZN2-KERNELDEBUGINFO-1684324
- published 27 Sep 2021
- disclosed 8 Dec 2019
Introduced: 8 Dec 2019
CVE-2019-19448 Open this link in a new tabHow to fix?
Upgrade Amazon-Linux:2 kernel-debuginfo to version 0:4.14.198-152.320.amzn2 or higher.
This issue was patched in ALAS2-2020-1495.
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.
In the Linux kernel 5.0.21 and 5.3.11, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in try_merge_free_space in fs/btrfs/free-space-cache.c because the pointer to a left data structure can be the same as the pointer to a right data structure.
References
- https://security.netapp.com/advisory/ntap-20200103-0001/
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19448
- https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19448
- https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
- https://usn.ubuntu.com/4578-1/