CVE-2020-25639

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Summary

CVECVE-2020-25639
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-03-04 22:15:13 UTC
Updated2026-10-08 21:17:26 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 4.4 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.003660000 probability, percentile 0.284540000 (date 2026-10-10)

Problem Types: CWE-476 | CWE-476 CWE-476

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary4.4MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary4.9AV:L/AC:L/Au:N/C:N/I:N/A:C

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete

AV:L/AC:L/Au:N/C:N/I:N/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Fedoraproject Fedora 32 All All All
Operating System Fedoraproject Fedora 33 All All All
Operating System Linux Linux Kernel All All All All
Operating System Redhat Enterprise Linux 5.0 All All All
Operating System Redhat Enterprise Linux 6.0 All All All
Operating System Redhat Enterprise Linux 7.0 All All All
Operating System Redhat Enterprise Linux 8.0 All All All
Operating System Redhat Messaging Realtime Grid 2.0 All All All
Application Redhat Openshift Container Platform 4.4 All All All
Application Redhat Openshift Container Platform 4.5 All All All
Application Redhat Openshift Container Platform 4.6 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Kernel affected Linux kernel versions prior to 5.12-rc1 Not specified

References

ReferenceSourceLinkTags
1876995 – (CVE-2020-25639) CVE-2020-25639 kernel: NULL pointer dereference via nouveau ioctl can lead to DoS af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Exploit, Issue Tracking, Third Party Advisory
[SECURITY] Fedora 32 Update: kernel-headers-5.10.20-100.fc32 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 33 Update: kernel-tools-5.10.20-200.fc33 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 32 Update: kernel-headers-5.10.20-100.fc32 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 33 Update: kernel-tools-5.10.20-200.fc33 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159135 Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2021-9140)
  • 159136 Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel-container (ELSA-2021-9141)
  • 198327 Ubuntu Security Notification for Linux kernel (OEM) vulnerabilities (USN-4911-1)
  • 198363 Ubuntu Security Notification for Linux kernel vulnerabilities (USN-4945-1)
  • 198366 Ubuntu Security Notification for Linux kernel vulnerabilities (USN-4949-1)
  • 198377 Ubuntu Security Notification for Linux kernel (Raspberry Pi) vulnerabilities (USN-4945-2)
  • 353150 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2022-001
  • 6140292 AWS Bottlerocket Security Update for kernel (GHSA-62pv-3mv8-wx3m)
  • 670396 EulerOS Security Update for kernel (EulerOS-SA-2021-1929)
  • 670936 EulerOS Security Update for kernel (EulerOS-SA-2021-1929)
  • 750428 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:0075-1)
  • 750434 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:0060-1)
  • 900084 CBL-Mariner Linux Security Update for kernel 5.10.52.1
  • 900304 CBL-Mariner Linux Security Update for kernel 5.10.57.1
  • 900319 CBL-Mariner Linux Security Update for kernel 5.10.60.1
  • 901207 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (6523-1)
  • 903272 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (3936)
  • 905937 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (3936-1)

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