SARA / Free Tools / CVE / CVE-2023-3866

CVE-2023-3866 — In the Linux kernel, the following vulnerability has been resolved:

In the Linux kernel, the following vulnerability has been resolved:

CVSS

— —

EPSS

1.00% (top 98.60%)

CWE

—

Published

2025-08-16T13:27:57.332Z

Last modified

2025-08-19T05:47:13.303Z

CVSS vector

—

01What is this vulnerability?

In the Linux kernel, the following vulnerability has been resolved:

Vendor	Product	Versions
Linux	Linux	0626e6641f6b467447c81dd7678a69c66f7746cf, 0626e6641f6b467447c81dd7678a69c66f7746cf, 0626e6641f6b467447c81dd7678a69c66f7746cf, 0626e6641f6b467447c81dd7678a69c66f7746cf
Linux	Linux	5.15, 0, 5.15.121, 6.1.36, 6.3.10, 6.4

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

Patch to a fixed version listed in the vendor advisory (see references below).
Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
Hunt historical logs for exploitation indicators — see Detection signatures below.

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

git.kernel.org — https://git.kernel.org/stable/c/eb947403518ea3d93f6d89264bb1f5416bb0c7d0
git.kernel.org — https://git.kernel.org/stable/c/854156d12caa9d36de1cf5f084591c7686cc8a9d
git.kernel.org — https://git.kernel.org/stable/c/d1066c1b3663401cd23c0d6e60cdae750ce00c0f
git.kernel.org — https://git.kernel.org/stable/c/5005bcb4219156f1bf7587b185080ec1da08518e

Want this in your SOAR or SIEM?
SARA's API returns EPSS, CVSS, KEV, and an analyst-grade summary in one call.