Home/CVE/A bug affects the Linux kernel’s ksmbd NTLMv2 authentication and is known to crash the OS immediately in Linux-based s
CVE

CVE-2023-0210

A bug affects the Linux kernel’s ksmbd NTLMv2 authentication and is known to crash the OS immediately in Linux-based s

A bug affects the Linux kernel’s ksmbd NTLMv2 authentication and is known to crash the OS immediately in Linux-based systems.

HIGH · CVSS 7.5 EPSS 0.71737
Act now
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 1% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
Look this up elsewhere - one-click external pivots
NVDCVE.orgCISAVulnersExploit-DBGitHub PoCVulnCheck KEVGreyNoise
▸ How to read a CVE - triage first, then detect and patch
This page is every public fact about CVE-2023-0210, cross-linked. Its job is to answer one question fast - does this need my attention now? - and then hand you the two things you do about it. Here is how an analyst reads it.
Triage: should I act now? Four signals, and they are not interchangeable:
CVSSseverity - how bad it is IF exploited, 0-10. A high CVSS alone is not urgency; a flaw can be a perfect 10 and never actually be attacked. EPSSprobability - a model’s estimate of the chance it is exploited in the next 30 days, 0-1. This is the “will it actually happen” signal. CISA KEVconfirmed - it is being exploited in the wild right now. The strongest signal on the page; KEV beats any score. Weaponisedavailability - public exploits / PoCs, and especially Metasploit modules rated Excellent / Great. Reliable, packaged exploit code means low-skill attackers can use it today.
How they combine: KEV, or a dependable Metasploit module, means patch now regardless of CVSS. High CVSS + low EPSS + no exploit is real but not an emergency - schedule it. Low CVSS but KEV-listed still gets patched now. The verdict above already weighed these for you; this is how it got there.
Then what - two workflows:
Detectwhen you cannot patch today, follow this CVE to the ATT&CK techniques it enables, then Build a SIEM detection (the green button) - author a rule, test it in Atomic, deploy it. That buys visibility while the patch waits. PatchAffected products / packages tell you if you are exposed; Fixed versions by distribution and Vendor advisories give the exact version that closes it.
Reading order for the panels below: verdict + badges, then Public exploits / Metasploit (is it weaponised), then ATT&CK techniques + Sigma / IDS rules (can I detect it), then Affected products / packages + Fixed versions (am I exposed, what patches it), then Threat actors / IOCs (who uses it), then Scoring & timeline / references (the evidence).
◆

ATT&CK techniques

1

Techniques this CVE enables - linked via CWECAPECATT&CK. High◆ = named directly in ATT&CK or Nuclei templates.

T1190 · Exploit Public-Facing Application
▤ Build a SIEM detection for these techniques
▤

CAPEC attack patterns

1

Attack patterns this CVE enables - the bridge from weakness to ATT&CK technique.

CAPEC-CAPEC-92 · Forced Integer Overflow
⬡

Weakness Classification

CWE-122Heap-based Buffer Overflow
CWE-787Out-of-bounds Write
▤

Affected Products & Versions

3
linux kernel>= 5.15 and < 5.15.87
linux kernel>= 5.16 and < 6.0.19
linux kernel>= 6.1 and < 6.1.5
▤

Affected Packages

39
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Ubuntu:14.04:LTS linux fixed in 3.11.0-12.19
Ubuntu:14.04:LTS linux-aws fixed in 4.4.0-1002.2
Ubuntu:14.04:LTS linux-azure fixed in 4.15.0-1023.24~14.04.1
Ubuntu:14.04:LTS linux-lts-xenial fixed in 4.4.0-13.29~14.04.1
Ubuntu:16.04:LTS linux fixed in 4.4.0-2.16
Ubuntu:16.04:LTS linux-aws fixed in 4.4.0-1001.10
Ubuntu:16.04:LTS linux-aws-hwe fixed in 4.15.0-1030.31~16.04.1
Ubuntu:16.04:LTS linux-azure fixed in 4.11.0-1009.9
Ubuntu:16.04:LTS linux-gcp fixed in 4.10.0-1004.4
Ubuntu:16.04:LTS linux-hwe fixed in 4.8.0-39.42~16.04.1
Ubuntu:16.04:LTS linux-kvm fixed in 4.4.0-1004.9
Ubuntu:16.04:LTS linux-oracle fixed in 4.15.0-1007.9~16.04.1
Ubuntu:18.04:LTS linux fixed in 4.13.0-16.19
Ubuntu:18.04:LTS linux-aws fixed in 4.15.0-1001.1
Ubuntu:18.04:LTS linux-aws-5.4 fixed in 5.4.0-1018.18~18.04.1
Ubuntu:18.04:LTS linux-azure-4.15 fixed in 4.15.0-1082.92
Ubuntu:18.04:LTS linux-azure-5.4 fixed in 5.4.0-1020.20~18.04.1
Ubuntu:18.04:LTS linux-dell300x fixed in 4.15.0-1005.8
Ubuntu:18.04:LTS linux-gcp-4.15 fixed in 4.15.0-1071.81
Ubuntu:18.04:LTS linux-gcp-5.4 fixed in 5.4.0-1019.19~18.04.2
Ubuntu:18.04:LTS linux-hwe-5.4 fixed in 5.4.0-37.41~18.04.1
Ubuntu:18.04:LTS linux-hwe-edge fixed in 5.0.0-15.16~18.04.1
Ubuntu:18.04:LTS linux-ibm-5.4 fixed in 5.4.0-1010.11~18.04.2
Ubuntu:18.04:LTS linux-kvm fixed in 4.15.0-1002.2
Ubuntu:18.04:LTS linux-oem-osp1 fixed in 5.0.0-1010.11
Ubuntu:18.04:LTS linux-oracle fixed in 4.15.0-1007.9
Ubuntu:18.04:LTS linux-oracle-5.4 fixed in 5.4.0-1019.19~18.04.1
Ubuntu:18.04:LTS linux-raspi-5.4 fixed in 5.4.0-1013.13~18.04.1
Ubuntu:18.04:LTS linux-raspi2 fixed in 4.13.0-1005.5
Ubuntu:18.04:LTS linux-snapdragon fixed in 4.4.0-1077.82
Ubuntu:20.04:LTS linux fixed in 5.4.0-9.12
Ubuntu:20.04:LTS linux-aws fixed in 5.4.0-1005.5
Ubuntu:20.04:LTS linux-aws-5.11
Ubuntu:20.04:LTS linux-aws-5.13
Ubuntu:20.04:LTS linux-aws-5.15 fixed in 5.15.0-1033.37~20.04.1
Ubuntu:20.04:LTS linux-aws-5.8
Ubuntu:20.04:LTS linux-azure fixed in 5.4.0-1006.6
Ubuntu:20.04:LTS linux-azure-5.11
Ubuntu:20.04:LTS linux-azure-5.13
⚠

Public Exploits & PoCs

9
These PoC and exploit links come from public sources and are not verified to be safe or functional. Review the code before running anything, and treat unverified entries as untrusted.
pocPublic PoC (nvd-reference)
pocPublic PoC (nvd-reference)
poc0xor0ne/awesome-list (trickest)
pocDiRaltvein/memory-corruption-examples (trickest)
pocJalexander798/JA_Tools-Cybersecurity-Resource-2 (trickest)
pocP3gEcTH8uJiYFVKb7lIn/awesome-list (trickest)
pocbachkhoasoft/awesome-list-ks (trickest)
pockolaarionvull/awesome-list (trickest)
pocsecurityonline.info · cve-2023-0210-flaw-in-linux-kernel-allows-unauthenticated...securityonline.info
📦

Fixed versions by distribution

11
The package version that resolves this CVE on each Linux distribution, from the vendor’s published security data. fixed in shows a patched version exists; open means the package is listed as affected with no fix yet.
suse sle15kernel-default open
suse sle15kernel-default-base open
suse sle15kernel-default-devel open
suse sle15kernel-default-man open
suse sle15kernel-devel open
suse sle15kernel-devel-rt open
suse sle15kernel-macros open
suse sle15kernel-source open
suse sle15kernel-source-azure open
suse sle15kernel-source-rt open
suse sle15reiserfs-kmp-default open
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · [email protected]
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD27 Mar 2023 · 10:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

7
usnUSN-6096-1
usnUSN-6091-1
usnUSN-6079-1
usnUSN-6004-1
usnUSN-5987-1
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commitMailing ListPatch
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=797805d81baa814f76cf7bdab35f86408a79d707Mailing ListPatch
https://github.com/cifsd-team/ksmbd/commit/8824b7af409f51f1316e92e9887c2fd48c0b26d6Patch
https://security.netapp.com/advisory/ntap-20230517-0002/Third Party Advisory
https://www.openwall.com/lists/oss-security/2023/01/11/1Mailing ListThird Party Advisory
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