CVE-2023-38667.5HighCWE-476

CVE-2023-3866: ksmbd: validate session id and tree id in the compound request

Linux

Vendor fix available · Affected: Linux · Exploitation: likely to be exploited (10% or more)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

12.7%probability of exploitation in the next 30 days

96th percentile

050100

Higher than 96% of scored CVEs

7.5HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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.

Affected products2

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Linux · LinuxVersions not stated
Linux · Linux5.15

On the Atlas

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Open the Atlas

Exploitation: Likely to be exploited (10% or more). EPSS gives it a 10% or higher chance of exploitation in the next 30 days.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: NULL Pointer Dereference · Memory Corruption
Vendor: Linux
Published: August 2025
Band: Likely to be exploited (10% or more), August 2025

CoverageNo articles yet

No CyberSIXT article names CVE-2023-3866 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.