Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2020-25639

CVE-2020-25639MEDIUM

n/a kernel — A NULL pointer dereference flaw was found in the Linux kernel's GPU Nouveau driver functionality in versions prior to 5.12-rc1 in the way…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   H   N  U  N  N  H    4.4   .0037   28.9     —

AFFECTED
  Product  Versions                                   Fixed
  kernel   Linux kernel versions prior to 5.12-rc1 –  —

TIMELINE
  Sep 16  Reserved by redhat
  Mar 4   Published (CNA: redhat)
  Oct 8   ENRICHED — CVE-2020-25639 (kernel). Received CVSS 4.4 and CPE data from NVD.
  Oct 8   EXPLOIT PUBLISHED — CVE-2020-25639 (kernel). Public exploit reference added.

CWE-476 · CNA: redhat · CVSS v3.1 · 3 references · NVD status: Modified

Description

A NULL pointer dereference flaw was found in the Linux kernel's GPU Nouveau driver functionality in versions prior to 5.12-rc1 in the way the user calls ioctl DRM_IOCTL_NOUVEAU_CHANNEL_ALLOC. This flaw allows a local user to crash the system.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
September 16, 2020	Reserved	Reserved by redhat
March 4, 2021	Published	Published (CNA: redhat)
October 8, 2026	ENRICHED	ENRICHED — CVE-2020-25639 (kernel). Received CVSS 4.4 and CPE data from NVD.
October 8, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2020-25639 (kernel). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	kernel	—	Linux kernel versions prior to 5.12-rc1	—

Weaknesses

CWE-476

References (3)

Authoritative record: CVE-2020-25639 at cve.org

Weaknesses: CWE-476

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2020-25639 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 Monday, October 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.