CVE-2022-0168: linux linux_kernel NULL Pointer Dereference
Vulnerability summary
CVE-2022-0168 is a medium (CVSS 4.4) NULL Pointer Dereference vulnerability in linux linux_kernel. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 19.6% of scored vulnerabilities.
Not severe (CVSS 4.4, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 26 · Related 18Timeline
- 26-08-2022PublishedVulnerability first disclosed.
- 02-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated4.4MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated4.4MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.27%
Chance of exploitation in the next 30 days
Percentile
20%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.27% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu72 products
- linux< 5.4.0-156.173 | < 5.15.0-37.39
- linux-aws< 5.4.0-1107.115 | < 5.15.0-1011.14
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
- linux-aws-5.13All versions (No fix recorded)
Debian1 product
- linux< 5.17.3-1
Linux1 product
- linux_kernel< 5.18
Redhat1 product
- enterprise_linux8.0 | 9.0
4 vendors · 75 products
