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Amazon Linux AMI: CVE-2019-19813: Security patch for kernel (ALAS-2021-1477)

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Amazon Linux AMI: CVE-2019-19813: Security patch for kernel (ALAS-2021-1477)

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:N/I:N/A:C)
Published
12/17/2019
Created
01/28/2021
Added
01/27/2021
Modified
10/14/2022

Description

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.

Solution(s)

  • amazon-linux-upgrade-kernel

References

  • ALAS-2021-1477
  • USN-4414-1
  • USN-4708-1
  • USN-4709-1
  • CVE-2019-19813

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