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Vulnerability record · CVE-2021-20316 · published 23 August 2022

CVE-2021-20316: Samba race condition vulnerability

Samba · Samba

A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of the share.

6.8 CVSS 3.1 Medium EPSS 0.98% · top 39.3% CWE-362 · Race condition
6.8CVSS 3.1 base score
0.98%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
12References
17 Jun 2026Last modified by NVD

Description

A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of the share.

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected products

7 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/security/cve/CVE-2021-20316 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2009673 Issue TrackingThird Party Advisory
https://bugzilla.samba.org/show_bug.cgi?id=14842 Issue TrackingVendor Advisory
https://security-tracker.debian.org/tracker/CVE-2021-20316 MitigationThird Party Advisory
https://security.gentoo.org/glsa/202309-06
https://www.samba.org/samba/security/CVE-2021-20316.html Vendor Advisory
https://access.redhat.com/security/cve/CVE-2021-20316 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2009673 Issue TrackingThird Party Advisory
https://bugzilla.samba.org/show_bug.cgi?id=14842 Issue TrackingVendor Advisory
https://security-tracker.debian.org/tracker/CVE-2021-20316 MitigationThird Party Advisory
https://security.gentoo.org/glsa/202309-06
https://www.samba.org/samba/security/CVE-2021-20316.html Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-20316), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.