CVE-2020-25212

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.

Category

7.0
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.03%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4487b93545214a9db8cbf32e86411677b0cca21 patch vendor advisory mailing list
https://twitter.com/grsecurity/status/1303370421958578179 third party advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.3 vendor advisory mailing list
https://usn.ubuntu.com/4527-1/ third party advisory vendor advisory
https://usn.ubuntu.com/4525-1/ third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html third party advisory mailing list
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html vendor advisory mailing list third party advisory
https://usn.ubuntu.com/4578-1/ third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00035.html vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html vendor advisory mailing list third party advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2020-25212?
CVE-2020-25212 has been scored as a high severity vulnerability.
How to fix CVE-2020-25212?
To fix CVE-2020-25212, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-25212 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-25212 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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