PT-2023-9552 · Linux+9 · Linux Kernel+9
Published
2023-12-21
·
Updated
2025-09-29
·
CVE-2023-52492
CVSS v2.0
4.6
Medium
| Vector | AV:L/AC:L/Au:S/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to a NULL pointer dereference in the dmaengine component of the Linux kernel. This occurs when the
dma async device channel register() function fails, causing chan->local to be freed and nullified. Subsequently, when dma async device unregister() is called, channels are unconditionally unregistered, leading to a NULL pointer dereference. The vulnerability can be exploited to cause a denial of service. The dma async device channel unregister() function needs to check if chan->local is not NULL before proceeding with channel unregistration to avoid this issue.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
Almalinux
Astra Linux
Centos
Linuxmint
Linux Kernel
Red Hat
Red Os
Rocky Linux
Suse
Ubuntu