PT-2019-6466 · Linux+6 · Linux Kernel+6
Published
2019-11-07
·
Updated
2021-05-28
·
CVE-2019-19767
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 5.4.2
Description
The issue is related to the mishandling of ext4 expand extra isize in the Linux kernel, which can lead to use-after-free errors in ext4 expand extra isize and ext4 xattr set entry. This is connected to the components fs/ext4/inode.c and fs/ext4/super.c. The vulnerability can be exploited by a remote attacker to cause a denial of service.
Recommendations
For Linux kernel versions prior to 5.4.2, update to version 5.4.2 or later to resolve the issue. As a temporary workaround, consider restricting access to the affected components fs/ext4/inode.c and fs/ext4/super.c to minimize the risk of exploitation.
Exploit
Fix
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Centos
Linux Kernel
Red Hat
Suse
Ubuntu