Advisory severityMedium4.4Vendor: LowRed Hat Linux

Medium [CVE-2020-25639] 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 medium-severity Red Hat Linux advisory covers CVE-2020-25639 affecting Red Hat Enterprise Linux 8, Red Hat package: kernel-rt.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2020-25639 Source published Mar 4, 2021Source updated Aug 28, 2020

VulniPulse record published Oct 8, 2026

CVE-2020-25639

Affected products & platforms

Red Hat LinuxLinux Kernel

Open source advisory

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Summary

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.

Red Hat severity: Low — CVSS 4.4 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-476.

Affected Red Hat products: Red Hat Enterprise Linux 8. Red Hat does not currently list a fixing RHSA for this CVE.

Affected products named by the advisory: Red Hat package: kernel-rt.

Affected versions

< 5.12-rc1
5.12

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Fixed versions

No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

To mitigate this issue, prevent the module nouveau from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically.

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Discussion(0)

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