PT-2025-38440 · Linux+6 · Linux Kernel+6
Published
2023-11-14
·
Updated
2026-05-22
·
CVE-2023-53421
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 flaw exists in the Linux kernel where the
blkg iostat set structure is not properly re-initialized after being cleared in the blkcg reset stats() function. This occurs when blkg alloc() is called to allocate a blkcg gq structure. Specifically, the blkg and sync fields within blkg iostat set require initialization, which is missed during the clearing process. This can lead to a kernel panic due to a NULL pointer access of the blkg pointer, and potentially issues with lockdep initialization in debug kernels due to the missing sync initialization.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
NULL Pointer Dereference
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Weakness Enumeration
Related Identifiers
Affected Products
Centos
Debian
Linuxmint
Linux Kernel
Red Hat
Suse
Ubuntu