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Status published
High
CVE-2020-25212
A TOCTOU mismatch in the NFS client code in the...
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4487b93545214a9db8cbf32e86411677b0cca21
- https://twitter.com/grsecurity/status/1303370421958578179
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.3
- https://usn.ubuntu.com/4527-1/
- https://usn.ubuntu.com/4525-1/
- https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html
- https://usn.ubuntu.com/4578-1/
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00035.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
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Affected Vendor
linux
View all reports →Affected Software
linux kernel, debian linux, leap, ubuntu linux
Vulnerable Versions:
0, 9.0, 15.1, 15.2, 14.04, 16.04, 18.04, 20.04
Timeline
Official Publish:
September 9th, 2020
Last Modified:
August 4th, 2024
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.