What is CVE-2020-24394?

CVE-2020-24394 is a high-severity vulnerability in Linux Kernel, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 7.1/10. Published 2020-08-19.

How severe is CVE-2020-24394?

High severity. CVSS v3 base score is 7.1 out of 10.

Is CVE-2020-24394 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Linux Kernel

CVE-2020-24394

In the Linux kernel before 5.7.8, fs/nfsd/vfs.c (in the NFS server) can set incorrect permissions on new filesystem objects when the filesystem lacks ACL support, aka CID-22cf8419f131. This occurs because the current umask is not considered.

Published 2020-08-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (29.9th percentile), scored 2026-11-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 29.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Linux Kernel
Oracle Sd-Wan Edge — versions 8.2
Starwindsoftware Starwind Virtual San — versions v8
Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
openSUSE Leap — versions 15.1

Weakness classification (CWE)

CWE-732 — Incorrect Permission Assignment for Critical Resource

Public proof-of-concept exploits

References

bugs.debian.org/cgi-bin/bugreport.cgi (Third Party Advisory, Issue Tracking)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.8 (Release Notes, Vendor Advisory)
usn.ubuntu.com/4465-1/ (vendor-advisory, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2020-09/msg00007.html (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/4483-1/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/4485-1/ (vendor-advisory, Third Party Advisory)
www.oracle.com/security-alerts/cpuApr2021.html (Patch, Third Party Advisory)
security.netapp.com/advisory/ntap-20200904-0003/ (Third Party Advisory)
www.starwindsoftware.com/security/sw-20210325-0004/ (Third Party Advisory)

Frequently asked questions

What is CVE-2020-24394?: CVE-2020-24394 is a high-severity vulnerability in Linux Kernel, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 7.1/10. Published 2020-08-19.
How severe is CVE-2020-24394?: High severity. CVSS v3 base score is 7.1 out of 10.
Is CVE-2020-24394 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.