PT-2022-7504 · Linux+4 · Linux Kernel+4
Randy Dunlap
·
Published
2022-03-01
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Updated
2025-09-29
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CVE-2022-48918
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 version 5.17.0-rc5
Description
The vulnerability is related to the use of "debugfs=off" on the kernel command line, which causes the iwiwifi's mvm module to use an invalid/unchecked debugfs dir pointer, resulting in a kernel NULL pointer dereference. This can lead to a denial of service. The issue is resolved by checking the debugfs dir pointer for an error before using it.
Recommendations
To resolve the issue, update the Linux kernel to a version that includes the fix for this vulnerability. Specifically, for Linux kernel version 5.17.0-rc5, apply the patch that checks the debugfs dir pointer for an error before using it. As a temporary workaround, consider disabling the use of "debugfs=off" on the kernel command line until a patched version is available.
Exploit
Fix
DoS
NULL Pointer Dereference
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Weakness Enumeration
Related Identifiers
Affected Products
Centos
Linux Kernel
Red Hat
Red Os
Suse