CVE-2022-0168

Severity: medium (CVSS 4.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-08-26 · updated 2026-06-17
Weakness: CWE-476

Description

A denial of service (DOS) issue was found in the Linux kernel’s smb2_ioctl_query_info function in the fs/cifs/smb2ops.c Common Internet File System (CIFS) due to an incorrect return from the memdup_user function. This flaw allows a local, privileged (CAP_SYS_ADMIN) attacker to crash the system.

Affected products

Linux kernel: before 5.18 — fixed in 5.18
Red Hat Enterprise Linux: 8.0, 9.0

How to fix

Upgrade to a fixed version: Linux kernel 5.18. Check the vendor advisory for mitigations.

References

https://access.redhat.com/security/cve/CVE-2022-0168
https://bugzilla.redhat.com/show_bug.cgi?id=2037386
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d6f5e358452479fa8a773b5c6ccc9e4ec5a20880
https://access.redhat.com/security/cve/CVE-2022-0168
https://bugzilla.redhat.com/show_bug.cgi?id=2037386
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d6f5e358452479fa8a773b5c6ccc9e4ec5a20880

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