CVE-2025-37899 — Security Box Score

CVE · referencelatest edition

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.

CVE-2025-37899HIGH

Linux Linux — ksmbd: fix use-after-free in session logoff

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  H  H  H    7.8   .0093   57.9     —

AFFECTED
  Product  Versions                                    Fixed
  Linux    0626e6641f6b467447c81dd7678a69c66f7746cf –  —
  Linux    5.15 –                                      6.1.159

TIMELINE
  Apr 16  Reserved by Linux
  May 20  Published (CNA: Linux)
  Jul 30  EXPLOIT PUBLISHED — CVE-2025-37899 (Linux). Public exploit reference added.
  Jul 30  RESCORED — CVE-2025-37899 (Linux). CVSS 8.8 → 7.8 (NVD).

CWE-416 · CNA: Linux · CVSS v3.1 · 7 references · NVD status: Modified

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in session logoff The sess->user object can currently be in use by another thread, for example if another connection has sent a session setup request to bind to the session being free'd. The handler for that connection could be in the smb2_sess_setup function which makes use of sess->user.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
April 16, 2025	Reserved	Reserved by Linux
May 20, 2025	Published	Published (CNA: Linux)
July 30, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2025-37899 (Linux). Public exploit reference added.
July 30, 2026	RESCORED	RESCORED — CVE-2025-37899 (Linux). CVSS 8.8 → 7.8 (NVD).

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Linux	Linux	—	0626e6641f6b467447c81dd7678a69c66f7746cf	—
Linux	Linux	—	5.15	6.1.159

Weaknesses

CWE-416

References (7)

Authoritative record: CVE-2025-37899 at cve.org

Vendors: linux

Weaknesses: CWE-416

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-37899 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.