CVE-2020-25639 Null dereference in kernel

What is CVE-2020-25639?

CVE-2020-25639 is a medium-severity vulnerability in Fedoraproject Fedora, published on 4 Mar 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-476

Which versions are affected by CVE-2020-25639?

It affects 5 products.

Products include Fedoraproject Fedora, Linux kernel, Redhat Enterprise Linux, Redhat Messaging Realtime Grid, Redhat Openshift Container Platform.

How do I fix CVE-2020-25639?

Apply the vendor's patch.

Is CVE-2020-25639 being exploited?

There is no known exploitation of CVE-2020-25639 in the wild and no public exploit code.

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All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-6523, DEBIAN-CVE-2020-25639, GHSA-9h9r-mqj8-gh3f, UBUNTU-CVE-2020-25639.