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CVE-2022-0168 is a NULL pointer dereference in the Linux kernel CIFS/SMB2 ioctl query-information path, specifically smb2_ioctl_query_info. The function accepts a user-controlled output-buffer length and did not reject zero. A zero length causes memdup_user to yield an invalid low-address pointer that passes the existing error check. With the PASSTHRU_SET_INFO flag, the pointer reaches SMB2_set_info_init and is used as the source of a memcpy operation, causing a kernel-space NULL pointer dereference. The upstream correction rejects output-buffer lengths that are zero or exceed the permitted maximum.
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No public exploit code observed for this vulnerability.
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9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel NULL-pointer dereference in smb2_ioctl_query_info.
Linux kernel SMB2 ioctl query-information NULL-pointer dereference vulnerability.
Linux kernel SMB2 ioctl query-info NULL-pointer dereference vulnerability.
Linux kernel SMB2 ioctl query-information NULL-pointer dereference.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.