MaxQueryDuration not honoured in Samba AD DC LDAP
Priority LOW 33CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-400.
Summary
MaxQueryDuration not honoured in Samba AD DC LDAP
Why it matters now
EPSS 0.02333 83rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | samba | Affects Samba 4.1 and newer. | — | No fix listed | CNA |
- samba Vendor— Affected Affects Samba 4.1 and newer. Fixed in — No fix listed CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* | 4.1.0 to before 4.16.0 | Vulnerable | Samba |
| cpe:2.3:a:redhat:storage:3.0:*:*:*:*:*:*:* | 3.0 | Vulnerable | Red Hat |
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 35 | Vulnerable | Fedoraproject |
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* Versions 4.1.0 to before 4.16.0 Vulnerable ·Samba
- cpe:2.3:a:redhat:storage:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·Red Hat
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 6 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Storage 3
- Red Hat Virtualization 4
Timeline
- 2026-10-02 Threatist record created from CVE-2021-3670
- 2026-10-03 Alias added: GHSA-p9j9-qqwf-j574
References
Patch 9
- https://bugzilla.redhat.com/show_bug.cgi?id=2077533
- https://bugzilla.samba.org/show_bug.cgi?id=14694
- https://gitlab.com/samba-team/samba/-/commit/1d5b155619bc532c46932965b215bd73a920e56f
- https://gitlab.com/samba-team/samba/-/commit/dcfcafdbf756e12d9077ad7920eea25478c29f81
- https://gitlab.com/samba-team/samba/-/commit/86fe9d48883f87c928bf31ccbd275db420386803
- https://gitlab.com/samba-team/samba/-/commit/e1ab0c43629686d1d2c0b0b2bcdc90057a792049
- https://gitlab.com/samba-team/samba/-/commit/2b3af3b560c9617a233c131376c870fce146c002
- https://gitlab.com/samba-team/samba/-/commit/5f0590362c5c0c5ee20503a67467f9be2d50e73b
- https://gitlab.com/samba-team/samba/-/commit/3507e96b3dcf0c0b8eff7b2c08ffccaf0812a393
Sources
- CVE-2021-3670 · CVE Program
- CVE-2021-3670 · NVD
- FIRST EPSS
- GHSA-p9j9-qqwf-j574 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-3670 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences