CVE-2023-0210
HighA bug affects the Linux kernel’s ksmbd NTLMv2 authentication and is known to crash the OS immediately in Linux-based systems.
Published May 17, 2023 · Updated Aug 12, 2026 · Also known as DEBIAN-CVE-2023-0210, UBUNTU-CVE-2023-0210
Key Facts
Patch immediately- CVE-2023-0210 is a high-severity vulnerability (CVSS 7.5 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 72% probability of exploitation in the next 30 days.
- Fixed versions are available, including linux 5.15.0-69.76, linux 6.1.7-1, Linux Kernel 5.15.87.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
72%
Higher than 99.4% 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-2023-0210 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
A bug affects the Linux kernel’s ksmbd NTLMv2 authentication and is known to crash the OS immediately in Linux-based systems.
Affected Products
113 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Linux KernelLinux | >= Kernel 6.2 RC4 | 5.15.87 |
| linuxdebian | See advisory | 6.1.7-1 |
| rootio-linuxrootio | See advisory | 6.1.7-1 |
| linux-aws-5.0ubuntu | See advisory | n/a |
| linux-aws-5.11ubuntu | See advisory | n/a |
Patched Releases
linux
5.15.0-69.76, 6.1.7-1
Linux Kernel
5.15.87
linux-aws
5.15.0-1033.37
linux-aws-5.15
5.15.0-1033.37~20.04.1
linux-azure
5.15.0-1035.42
linux-azure-5.15
5.15.0-1035.42~20.04.1
linux-azure-5.19
5.19.0-1026.29~22.04.1
linux-azure-fde
5.15.0-1035.42.1
linux-azure-fde-5.15
5.15.0-1035.42~20.04.1.1
linux-bluefield
5.15.0-1015.17
linux-gcp
5.15.0-1031.38
linux-gcp-5.15
5.15.0-1031.38~20.04.1
linux-gke
5.15.0-1030.35
linux-gke-5.15
5.15.0-1029.34~20.04.1
linux-gkeop
5.15.0-1017.22
linux-gkeop-5.15
5.15.0-1017.22~20.04.1
linux-hwe-5.15
5.15.0-69.76~20.04.1
linux-hwe-5.19
5.19.0-42.43~22.04.1
linux-ibm
5.15.0-1027.30
linux-intel-iot-realtime
5.15.0-1023.28
linux-intel-iotg
5.15.0-1027.32
linux-intel-iotg-5.15
5.15.0-1027.32~20.04.1
linux-kvm
5.15.0-1030.35
linux-lowlatency
5.15.0-69.76
linux-lowlatency-hwe-5.15
5.15.0-69.76~20.04.1
Timeline
Publicly disclosed
May 17, 2023
Last updated
Aug 12, 2026
Weakness Type
- CWE-122 Heap-based Buffer Overflow
- CWE-787 Out-of-bounds Write
References
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2023/0xxx/CVE-2023-0210.json
- advisoryhttps://git.kernel.org/linus/797805d81baa814f76cf7bdab35f86408a79d707
- advisoryhttps://launchpad.net/ubuntu/+source/linux/5.19.0-42.43
- advisoryhttps://launchpad.net/ubuntu/+source/linux-aws/5.19.0-1025.26
- advisoryhttps://launchpad.net/ubuntu/+source/linux-aws-5.4/5.4.0-1099.107~18.04.1
FAQ
Common Questions.
A bug affects the Linux kernel’s ksmbd NTLMv2 authentication and is known to crash the OS immediately in Linux-based systems.
Affected: Linux Kernel versions >= Kernel 6.2 RC4; 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 linux 5.15.0-69.76, linux 6.1.7-1, Linux Kernel 5.15.87.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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