PT-2019-4485 · Linux+5 · Linux Kernel+5
Published
2019-06-21
·
Updated
2025-09-29
·
CVE-2019-19447
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel version 5.0.21
Description
The issue is related to a use-after-free in the
ext4 put super function in fs/ext4/super.c, which is connected to the dump orphan list function in the same file. This can occur when mounting a crafted ext4 filesystem image, performing certain operations, and then unmounting it. The exploitation of this issue may allow a remote attacker to impact the confidentiality, integrity, and availability of protected information.Recommendations
For Linux kernel version 5.0.21, consider disabling the
ext4 put super function as a temporary workaround until a patch is available. Restrict access to the fs/ext4/super.c module to minimize the risk of exploitation. Avoid using crafted ext4 filesystem images until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.Exploit
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Centos
Linux Kernel
Red Hat
Suse