CVE-2022-47938
Mediumfs/ksmbd/smb2misc.c has an out-of-bounds read and OOPS for SMB2_TREE_CONNECT.
Published Dec 27, 2022 · Updated Aug 12, 2026 · Also known as DEBIAN-CVE-2022-47938, UBUNTU-CVE-2022-47938
Key Facts
Patch immediately- CVE-2022-47938 is a medium-severity vulnerability (CVSS 6.5 v3.1) affecting Linux Kernel, linux (debian), rootio-linux and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 60% probability of exploitation in the next 30 days.
- Fixed versions are available, including kernel 5.15.86.1-1, linux 5.15.0-53.59, linux 5.19.6-1.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
60%
Higher than 99.1% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2022-47938 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
An issue was discovered in ksmbd in the Linux kernel 5.15 through 5.19 before 5.19.2. fs/ksmbd/smb2misc.c has an out-of-bounds read and OOPS for SMB2_TREE_CONNECT.
Affected Products
84 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Linux KernelLinux | See advisory | 5.19.2 |
| linuxdebian | See advisory | 5.19.6-1 |
| rootio-linuxrootio | See advisory | 5.19.6-1 |
| linux-aws-5.0ubuntu | See advisory | n/a |
| linux-aws-5.11ubuntu | See advisory | n/a |
Patched Releases
kernel
5.15.86.1-1
linux
5.15.0-53.59, 5.19.6-1
Linux Kernel
5.19.2
linux-aws
5.15.0-1023.27
linux-aws-5.15
5.15.0-1023.27~20.04.1
linux-azure
5.15.0-1023.29
linux-azure-5.15
5.15.0-1023.29~20.04.1
linux-azure-fde
5.15.0-1024.30.1
linux-azure-fde-5.15
5.15.0-1029.36~20.04.1.1
linux-gcp
5.15.0-1022.29
linux-gcp-5.15
5.15.0-1022.29~20.04.1
linux-gke
5.15.0-1020.25
linux-gke-5.15
5.15.0-1020.25~20.04.1
linux-gkeop
5.15.0-1008.12
linux-gkeop-5.15
5.15.0-1008.12~20.04.1
linux-hwe-5.15
5.15.0-53.59~20.04.1
linux-ibm
5.15.0-1018.21
linux-intel-iotg
5.15.0-1018.23
linux-intel-iotg-5.15
5.15.0-1018.23~20.04.1
linux-kvm
5.15.0-1021.26
linux-lowlatency
5.15.0-53.59
linux-lowlatency-hwe-5.15
5.15.0-53.59~20.04.1
linux-nvidia
5.15.0-1015.15
linux-oracle
5.15.0-1022.28
linux-oracle-5.15
5.15.0-1022.28~20.04.1
Timeline
Publicly disclosed
Dec 27, 2022
Last updated
Aug 12, 2026
Weakness Type
- CWE-125 Out-of-bounds Read
References
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2022/47xxx/CVE-2022-47938.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2022-47938
- advisoryhttps://securityonline.info/critical-remote-code-execution-vulnerability-in-linux-kernel/
- advisoryhttps://security-tracker.debian.org/tracker/CVE-2022-47938
- advisoryhttps://ubuntu.com/security/CVE-2022-47938
FAQ
Common Questions.
An issue was discovered in ksmbd in the Linux kernel 5.15 through 5.19 before 5.19.2.
Affected: Linux Kernel; linux (debian); rootio-linux, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including kernel 5.15.86.1-1, linux 5.15.0-53.59, linux 5.19.6-1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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