What’s Vulnerable › Vulnerabilities

CVE-2020-24394

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-08-19 · updated 2026-06-17
• Weakness: CWE-732

Description

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.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 20.04
• Linux kernel: before 5.7.8 — fixed in 5.7.8
• openSUSE Leap: 15.1
• Oracle Corporation SD-WAN Edge: 8.2
• Starwindsoftware Starwind Virtual San: v8-build12533, v8-build12658, v8-build12859, v8-build13170, v8-build13586, v8-build13861

How to fix

Upgrade to a fixed version: Linux kernel 5.7.8. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00007.html
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=962254
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.8
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=22cf8419f1319ff87ec759d0ebdff4cbafaee832
• https://security.netapp.com/advisory/ntap-20200904-0003/
• https://usn.ubuntu.com/4465-1/
• https://usn.ubuntu.com/4483-1/
• https://usn.ubuntu.com/4485-1/
• https://www.oracle.com/security-alerts/cpuApr2021.html
• https://www.starwindsoftware.com/security/sw-20210325-0004/
• http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00007.html
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=962254

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