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: smbdirect: validate data_offset and data_length field of smb_direct_data_transfer
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U H N H 7.1 .0024 15.7 —
AFFECTED
Product Versions Fixed
Linux 2ea086e35c3d726a3bacd0a971c1f02a50e98206 – —
Linux 5.15 – 5.15.194
TIMELINE
Apr 16 Reserved by Linux
Oct 4 Published (CNA: Linux)
Jul 30 RESCORED — CVE-2025-39943 (Linux). CVSS 9.4 → 7.1 (NVD).
Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: smbdirect: validate data_offset and data_length field of smb_direct_data_transfer
If data_offset and data_length of smb_direct_data_transfer struct are
invalid, out of bounds issue could happen.
This patch validate data_offset and data_length field in recv_done.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| April 16, 2025 | Reserved | Reserved by Linux |
| October 4, 2025 | Published | Published (CNA: Linux) |
| July 30, 2026 | RESCORED | RESCORED — CVE-2025-39943 (Linux). CVSS 9.4 → 7.1 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Linux | Linux | — | 2ea086e35c3d726a3bacd0a971c1f02a50e98206 | — |
| Linux | Linux | — | 5.15 | 5.15.194 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-39943 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.