PT-2024-11171 · Linux+4 · Linux Kernel+4
Alexey Makhalov
·
Published
2021-06-06
·
Updated
2025-05-28
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CVE-2021-47119
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A memory leak issue has been resolved in the Linux kernel, specifically in the ext4 file system. The problem occurs when buffer head references are not released before calling
kill bdev(), resulting in the buffer head and its associated page not being freed. This issue can be reproduced by creating an infinite loop of starting and stopping a mount point using systemctl. The memory leak is amplified by systemd creating a cgroup for each slice, which never gets freed, leading to increased memory consumption.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Memory Leak
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linuxmint
Linux Kernel
Suse
Ubuntu