Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV L L L N U N N H 5.5 .0964 95.1 —
AFFECTED Product Versions Fixed Linux 0626e6641f6b467447c81dd7678a69c66f7746cf – — Linux 5.15 – 5.15.121
TIMELINE Jul 24 Reserved by Linux Aug 16 Published (CNA: Linux) Aug 4 RESCORED — CVE-2023-3866 (Linux). CVSS 7.5 → 5.5 (NVD).
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.
| Date | Event | Detail |
|---|---|---|
| July 24, 2023 | Reserved | Reserved by Linux |
| August 16, 2025 | Published | Published (CNA: Linux) |
| August 4, 2026 | RESCORED | RESCORED — CVE-2023-3866 (Linux). CVSS 7.5 → 5.5 (NVD). |
Authoritative record: CVE-2023-3866 at cve.org
Vendors: linux
Weaknesses: CWE-476
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2023-3866 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.