Medium severity5.9NVD Advisory· Published Mar 6, 2023· Updated Jun 17, 2026
CVE-2021-20251
CVE-2021-20251
Description
A flaw was found in samba. A race condition in the password lockout code may lead to the risk of brute force attacks being successful if special conditions are met.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
42(expand)+ 2 more
- (no CPE)
- (no CPE)
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*range: >=4.1.0,<4.16.8
- osv-coords38 versionspkg:rpm/opensuse/samba&distro=openSUSE%20Tumbleweedpkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/samba&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/samba&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2012%20SP4pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Micro%205.3pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP4pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP4pkg:rpm/opensuse/samba&distro=openSUSE%20Leap%20Micro%205.3pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP3pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-ESPOSpkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2015%20SP3pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/samba&distro=SUSE%20Manager%20Proxy%204.2pkg:rpm/suse/samba&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.2pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/samba&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/opensuse/samba&distro=openSUSE%20Leap%20Micro%205.2pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2012%20SP5pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg:rpm/suse/samba&distro=SUSE%20Enterprise%20Storage%206pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/samba&distro=SUSE%20Manager%20Server%204.2pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP2pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP1pkg:rpm/opensuse/samba&distro=openSUSE%20Leap%2015.4pkg:rpm/suse/samba&distro=SUSE%20Enterprise%20Storage%207pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS
< 4.17.1+git.270.17afe7cb6b-1.1+ 37 more
- (no CPE)range: < 4.17.1+git.270.17afe7cb6b-1.1
- (no CPE)range: < 4.4.2-38.55.1
- (no CPE)range: < 4.6.16+git.384.9fec958bed-3.76.1
- (no CPE)range: < 4.6.16+git.384.9fec958bed-3.76.1
- (no CPE)range: < 4.6.16+git.384.9fec958bed-3.76.1
- (no CPE)range: < 4.6.16+git.384.9fec958bed-3.76.1
- (no CPE)range: < 4.6.16+git.384.9fec958bed-3.76.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150400.3.19.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150400.3.19.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150400.3.19.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150400.3.19.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150300.3.49.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150300.3.49.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150300.3.49.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150300.3.49.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150300.3.49.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150300.3.49.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150300.3.49.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150300.3.49.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150300.3.49.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150300.3.49.1
- (no CPE)range: < 4.11.14+git.384.5dc2c21dce-150200.4.44.1
- (no CPE)range: < 4.15.13+git.534.0d9f8ece26-3.77.1
- (no CPE)range: < 4.15.13+git.534.0d9f8ece26-3.77.1
- (no CPE)range: < 4.15.13+git.534.0d9f8ece26-3.77.1
- (no CPE)range: < 4.15.13+git.534.0d9f8ece26-3.77.1
- (no CPE)range: < 4.9.5+git.552.fec1a5e57a-150100.3.73.1
- (no CPE)range: < 4.9.5+git.552.fec1a5e57a-150100.3.73.1
- (no CPE)range: < 4.9.5+git.552.fec1a5e57a-150100.3.73.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150300.3.49.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150300.3.49.1
- (no CPE)range: < 4.11.14+git.384.5dc2c21dce-150200.4.44.1
- (no CPE)range: < 4.11.14+git.384.5dc2c21dce-150200.4.44.1
- (no CPE)range: < 4.11.14+git.384.5dc2c21dce-150200.4.44.1
- (no CPE)range: < 4.9.5+git.552.fec1a5e57a-150100.3.73.1
- (no CPE)range: < 4.15.13+git.591.ab36624310c-150400.3.19.1
- (no CPE)range: < 4.11.14+git.384.5dc2c21dce-150200.4.44.1
- (no CPE)range: < 4.9.5+git.552.fec1a5e57a-150100.3.73.1
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
4- bugzilla.samba.org/show_bug.cginvdExploitIssue TrackingThird Party Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingThird Party Advisory
- security.netapp.com/advisory/ntap-20230331-0005/nvdThird Party Advisory
- security.gentoo.org/glsa/202309-06nvd
News mentions
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