CVE•Published 2025-08-16•Modified 2026-08-04•1 article on news•5 live references•NVD data
CVE-2023-3866Linux · Linux_kernel
Vulnerability data via NVD (ingested)
CVSS v3.1
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS percentile
97
Exploit Prediction Scoring System · top 3% of all CVEs
Weaknesses (CWE)
Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate session id and tree id in the compound request This patch validate session id and tree id in compound request. If first operation in the compound is SMB2 ECHO request, ksmbd bypass session and tree validation. So work->sess and work->tcon could be NULL. If secound request in the compound access work->sess or tcon, It cause NULL pointer dereferecing error.
Timeline
Published 2025-08-16
Modified 2026-08-04
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2023-3866Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Linux Kernel"Hosts Shodan identified as running Linux Kernel.
More intel sources (5)
Shodan report
vuln:CVE-2023-3866Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2023-3866Censys host search filtered to this CVE id.
grep.app
CVE-2023-3866Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2023-3866GitHub code search for direct mentions.
Google dork
"CVE-2023-3866" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (3)
CVE-2023-38663 repos
xairy/linux-kernel-exploitationunknown
A collection of links related to Linux kernel security and exploitation
hugefiver/mystarsunknown
mrkeyoor/honest-awesomeunknown
The awesome list that tells you what NOT to install. 320+ open-source tools scored on setup, docs, community & maturity — each with an honest "skip it if" warning. Updated daily.