CVE-2020-25212 Race condition in n/a

What is CVE-2020-25212?

CVE-2020-25212 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 9 Sep 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452.

Weakness: CWE-787, CWE-367

Which versions are affected by CVE-2020-25212?

It affects 4 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel, Opensuse Leap.

How do I fix CVE-2020-25212?

Apply the vendor's patch.

Is CVE-2020-25212 being exploited?

There is no known exploitation of CVE-2020-25212 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2020-25212, GHSA-w56x-hj26-mq65, SUSE-SU-2020:3181-1, UBUNTU-CVE-2020-25212.