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.
Linux Linux — ksmbd: validate command request size
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U N N H 5.5 .0029 21.9 —
AFFECTED
Product Versions Fixed
Linux 35f450f54dca1519bb24faacd0428db09f89a11f – —
Linux 6.4 – 5.15.127
TIMELINE
Aug 24 Reserved by Linux
Aug 16 Published (CNA: Linux)
Aug 4 RESCORED — CVE-2023-4515 (Linux). CVSS 9.1 → 5.5 (NVD).
Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: validate command request size
In commit 2b9b8f3b68ed ("ksmbd: validate command payload size"), except
for SMB2_OPLOCK_BREAK_HE command, the request size of other commands
is not checked, it's not expected. Fix it by add check for request
size of other commands.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| August 24, 2023 | Reserved | Reserved by Linux |
| August 16, 2025 | Published | Published (CNA: Linux) |
| August 4, 2026 | RESCORED | RESCORED — CVE-2023-4515 (Linux). CVSS 9.1 → 5.5 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| Linux | Linux | — | 35f450f54dca1519bb24faacd0428db09f89a11f | — |
| Linux | Linux | — | 6.4 | 5.15.127 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2023-4515 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.