kernel: smb2_ioctl_query_info NULL pointer dereference
Published Aug 26, 2022
4.4
MEDIUMCVSS 3.1
EPSS 0.27%
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
- Vendor n/a Product Kernel Defaultn/a
- Version Affects v5.4–5.12, v5.13-rc+HEADStatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Kernel | n/a |
|
Configuration 1
- < 5.18
Configuration 2
- 8.0
- 9.0
No data.
Red Hat Enterprise Linux 8
kernel-0:4.18.0-425.3.1.el8
Fixed · RHSA-2022:7683
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-425.3.1.rt7.213.el8
Fixed · RHSA-2022:7444
Red Hat Enterprise Linux 8.6 Extended Update Support
kernel-0:4.18.0-372.91.1.el8_6
Fixed · RHSA-2024:0724
Red Hat Enterprise Linux 9
kernel-0:5.14.0-162.6.1.el9_1
Fixed · RHSA-2022:8267
Red Hat Enterprise Linux 9
kernel-0:5.14.0-162.6.1.el9_1
Fixed · RHSA-2022:8267
Red Hat Enterprise Linux 9
kernel-rt-0:5.14.0-162.6.1.rt21.168.el9_1
Fixed · RHSA-2022:7933
Red Hat Virtualization 4 for Red Hat Enterprise Linux 8
kernel-0:4.18.0-372.91.1.el8_6
Fixed · RHSA-2024:0724
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | kernel-0:4.18.0-425.3.1.el8 | Fixed | RHSA-2022:7683 |
| Red Hat Enterprise Linux 8 | kernel-rt-0:4.18.0-425.3.1.rt7.213.el8 | Fixed | RHSA-2022:7444 |
| Red Hat Enterprise Linux 8.6 Extended Update Support | kernel-0:4.18.0-372.91.1.el8_6 | Fixed | RHSA-2024:0724 |
| Red Hat Enterprise Linux 9 | kernel-0:5.14.0-162.6.1.el9_1 | Fixed | RHSA-2022:8267 |
| Red Hat Enterprise Linux 9 | kernel-0:5.14.0-162.6.1.el9_1 | Fixed | RHSA-2022:8267 |
| Red Hat Enterprise Linux 9 | kernel-rt-0:5.14.0-162.6.1.rt21.168.el9_1 | Fixed | RHSA-2022:7933 |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | kernel-0:4.18.0-372.91.1.el8_6 | Fixed | RHSA-2024:0724 |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.27% (0.00269) | 17.33th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.26% (0.00261) | 17.19th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.01% (0.00011) | 0.72th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00044) | 14.58th | v3 (v2023.03.01) |
| Jun 22, 2024 | 0.04% (0.00044) | 12.67th | v3 (v2023.03.01) |
| Mar 18, 2024 | 0.04% (0.00044) | 10.67th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00890) | 30.33th | v2 (v2022.01.01) |
| Feb 13, 2023 | 0.89% (0.00890) | 29.93th | v2 (v2022.01.01) |
| Feb 3, 2023 | 1.03% (0.01034) | 40.96th | v2 (v2022.01.01) |
| Aug 27, 2022 | 0.89% (0.00890) | 28.47th | v2 (v2022.01.01) |
References (6)
- https://access.redhat.com/security/cve/CVE-2022-0168 x_refsource_MISCThird Party AdvisoryVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2037386 x_refsource_MISCIssue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d6f5e358452479fa8a773b5c6ccc9e4ec5a20880 x_refsource_MISCMailing ListPatchVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2022-0168
- https://starlabs.sg/advisories/22/22-0168/
- https://www.cve.org/CVERecord?id=CVE-2022-0168
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2022-0168 | x_refsource_MISCThird Party AdvisoryVendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2037386 | x_refsource_MISCIssue TrackingPatchThird Party Advisory | |
| https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d6f5e358452479fa8a773b5c6ccc9e4ec5a20880 | x_refsource_MISCMailing ListPatchVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2022-0168 | ||
| https://starlabs.sg/advisories/22/22-0168/ | ||
| https://www.cve.org/CVERecord?id=CVE-2022-0168 |
Change history (0)
No recorded changes yet.