Use After Free Affecting kernel package, versions <0:4.14.214-160.339.amzn2
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Test your applications- Snyk ID SNYK-AMZN2-KERNEL-1693132
- published 27 Sep 2021
- disclosed 17 Dec 2019
Introduced: 17 Dec 2019
CVE-2019-19813 Open this link in a new tabHow to fix?
Upgrade Amazon-Linux:2 kernel to version 0:4.14.214-160.339.amzn2 or higher.
This issue was patched in ALAS2-2021-1588.
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.
In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in __mutex_lock in kernel/locking/mutex.c. This is related to mutex_can_spin_on_owner in kernel/locking/mutex.c, __btrfs_qgroup_free_meta in fs/btrfs/qgroup.c, and btrfs_insert_delayed_items in fs/btrfs/delayed-inode.c.
References
- https://security.netapp.com/advisory/ntap-20200103-0001/
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19813
- https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19813
- https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
- https://usn.ubuntu.com/4414-1/