The MS-SAMR and MS-LSAD protocol implementations in Samba 3.x and 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 mishandle DCERPC connections, which allows man-in-the-middle attackers to perform protocol-downgrade attacks and impersonate users by modifying the client-server data stream, aka "BADLOCK."
CVE-2016-2118
Score elevated to 7.7 because EPSS predicts 37% probability of exploitation within the next 30 days (top 1.6% of all CVEs). NVD baseline CVSS 7.5 retained for reference. Confidence: see factors.
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.7(high)
- EG Risk
- 55(Track)EG Risk 55/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity77% × 45%Exploitation40% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 37%
- EPSS %ILE
- 98%
- KEV
- Not listed
Published
April 12, 2016
Last Modified
June 17, 2026
References (90)
- secalert@redhathttp://badlock.org/
- secalert@redhathttp://lists.fedoraproject.org/pipermail/package-announce/2016-April/182185.html
- secalert@redhathttp://lists.fedoraproject.org/pipermail/package-announce/2016-April/182272.html
- secalert@redhathttp://lists.fedoraproject.org/pipermail/package-announce/2016-April/182288.html
- secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2016-04/msg00020.html
- secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2016-04/msg00021.html
- secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2016-04/msg00022.html
- secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html
- secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2016-04/msg00024.html
- secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html
- secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
- secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
- secalert@redhathttp://rhn.redhat.com/errata/RHSA-2016-0611.html
- secalert@redhathttp://rhn.redhat.com/errata/RHSA-2016-0612.html
- secalert@redhathttp://rhn.redhat.com/errata/RHSA-2016-0613.html
Patch Availability(12)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | samba (2:4.3.8+dfsg-0ubuntu0.15.10.2) @ wily | 2026-05-22 | ubuntu |
| redhat | samba-0:4.2.10-5.ael7b_1 | 2016-04-13 | redhat |
| redhat | samba-0:4.2.10-6.el7_2 | 2016-04-13 | redhat |
| redhat | samba4-0:4.2.10-6.el6_6 | 2016-04-12 | redhat |
| redhat | samba-0:4.2.11-2.el7rhgs | 2016-04-12 | redhat |
| redhat | samba-0:3.0.33-3.37.el4 | 2016-04-12 | redhat |
| redhat | samba-0:3.0.33-3.40.el5_9 | 2016-04-12 | redhat |
| redhat | samba-0:3.6.23-30.el6_7 | 2016-04-12 | redhat |
| redhat | samba3x-0:3.6.23-12.el5_11 | 2016-04-12 | redhat |
| redhat | samba-0:3.0.33-3.41.el5_11 | 2016-04-12 | redhat |
| redhat | samba3x-0:3.6.23-12.el5_9 | 2016-04-12 | redhat |
| redhat | samba-0:3.6.23-30.el6_6 | 2016-04-12 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(6 across 6 ecosystems)
Debian:11(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| samba | — | 2:4.3.7+dfsg-1 | — |
Debian:12(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| samba | — | 2:4.3.7+dfsg-1 | — |
Debian:13(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| samba | — | 2:4.3.7+dfsg-1 | — |
Debian:14(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| samba | — | 2:4.3.7+dfsg-1 | — |
Debian:7(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| samba | 2:3.6.6-6 ... 2:3.6.6-6+deb7u8 (13 versions) | 2:3.6.6-6+deb7u9 | — |
Debian:8(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| samba | 2:4.1.17+dfsg-2 ... 2:4.2.1+dfsg-1 (11 versions) | 2:4.2.10+dfsg-0+deb8u1 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(12)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
- Red HatRHSA-2016:0611IMPORTANT2016-04-12
RHSA-2016:0611 — Important
- Red HatRHSA-2016:0612IMPORTANT2016-04-12
RHSA-2016:0612 — Important
- Red HatRHSA-2016:0613IMPORTANT2016-04-12
RHSA-2016:0613 — Important
- Red HatRHSA-2016:0614IMPORTANT2016-04-12
RHSA-2016:0614 — Important
- Red HatRHSA-2016:0618IMPORTANT2016-04-12
RHSA-2016:0618 — Important
- Red HatRHSA-2016:0619IMPORTANT2016-04-12
RHSA-2016:0619 — Important
- Red HatRHSA-2016:0620IMPORTANT2016-04-12
RHSA-2016:0620 — Important
- Red HatRHSA-2016:0621IMPORTANT2016-04-12
RHSA-2016:0621 — Important
- Red HatRHSA-2016:0623IMPORTANT2016-04-12
RHSA-2016:0623 — Important
- Red HatRHSA-2016:0624IMPORTANT2016-04-12
RHSA-2016:0624 — Important
- Red HatRHSA-2016:0625IMPORTANT2016-04-12
RHSA-2016:0625 — Important
- UbuntuUSN-2950-1MEDIUM
Samba vulnerabilities
Data Freshness Timeline
(refreshed 6× in last 7d / 23× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-08-19 16:59 UTCEPSS rescore
- 2026-08-18 13:43 UTCEPSS rescore
- 2026-08-17 13:42 UTCEPSS rescore
- 2026-08-16 14:51 UTCEPSS rescore
- 2026-08-16 02:09 UTCEPSS rescore
- 2026-08-15 01:25 UTCEPSS rescore
- 2026-08-14 12:54 UTCOSV refresh
- 2026-08-12 13:46 UTCEPSS rescore
- 2026-08-11 13:36 UTCEPSS rescore
- 2026-08-09 13:42 UTCEPSS rescore
- 2026-08-08 16:32 UTCEPSS rescore
- 2026-08-06 13:42 UTCEPSS rescore
- 2026-08-05 19:12 UTCEPSS rescore
- 2026-08-04 15:04 UTCEPSS rescore
- 2026-08-04 10:32 UTCEPSS rescore
- 2026-08-01 04:11 UTCEPSS rescore
- 2026-07-30 16:23 UTCEPSS rescore
- 2026-07-30 01:54 UTCOSV refresh
- 2026-07-28 15:31 UTCEPSS rescore
- 2026-07-26 14:50 UTCEPSS rescore
- 2026-07-25 14:13 UTCEPSS rescore
- 2026-07-23 14:14 UTCEPSS rescore
- 2026-07-23 01:22 UTCEG score recompute▲ 0.20
- 2026-07-22 22:01 UTCEG score recompute
- 2026-07-22 14:04 UTCEPSS rescore
Show 74 moreShow fewer
- 2026-07-21 15:21 UTCEPSS rescore
- 2026-07-21 15:21 UTCEPSS rescore
- 2026-07-20 17:03 UTCEPSS rescore
- 2026-07-19 02:26 UTCEPSS rescore
- 2026-07-19 02:26 UTCEPSS rescore
- 2026-07-18 10:00 UTCEPSS rescore
- 2026-07-18 10:00 UTCEPSS rescore
- 2026-07-16 16:59 UTCEPSS rescore
- 2026-07-16 16:59 UTCEPSS rescore
- 2026-07-15 16:54 UTCEPSS rescore
- 2026-07-15 16:54 UTCEPSS rescore
- 2026-07-15 01:56 UTCEPSS rescore
- 2026-07-15 01:56 UTCEPSS rescore
- 2026-07-13 06:09 UTCEPSS rescore
- 2026-07-12 10:38 UTCOSV refresh
- 2026-07-12 05:43 UTCEPSS rescore
- 2026-07-12 05:43 UTCEPSS rescore
- 2026-07-11 08:23 UTCEPSS rescore
- 2026-07-09 19:05 UTCEPSS rescore
- 2026-07-08 15:10 UTCEPSS rescore
- 2026-07-06 16:24 UTCEPSS rescore
- 2026-07-06 16:24 UTCEPSS rescore
- 2026-07-05 02:27 UTCEPSS rescore
- 2026-07-01 15:02 UTCEPSS rescore
- 2026-06-30 23:19 UTCEPSS rescore
- 2026-06-29 14:03 UTCEPSS rescore
- 2026-06-28 04:53 UTCEPSS rescore
- 2026-06-27 03:05 UTCEPSS rescore
- 2026-06-27 03:05 UTCEPSS rescore
- 2026-06-25 13:47 UTCEPSS rescore
- 2026-06-25 13:47 UTCEPSS rescore
- 2026-06-24 14:02 UTCEPSS rescore
- 2026-06-24 14:02 UTCEPSS rescore
- 2026-06-23 21:30 UTCEPSS rescore
- 2026-06-23 16:20 UTCOSV refresh
- 2026-06-22 14:23 UTCEPSS rescore
- 2026-06-21 01:57 UTCEPSS rescore
- 2026-06-21 01:57 UTCEPSS rescore
- 2026-06-18 17:50 UTCEPSS rescore
- 2026-06-17 17:50 UTCEPSS rescore
- 2026-06-17 17:50 UTCEPSS rescore
- 2026-06-16 17:50 UTCEPSS rescore
- 2026-06-16 17:50 UTCEPSS rescore
- 2026-06-15 17:45 UTCEPSS rescore
- 2026-06-13 22:57 UTCEPSS rescore
- 2026-06-13 22:57 UTCEPSS rescore
- 2026-06-12 23:09 UTCEPSS rescore
- 2026-06-12 23:09 UTCEPSS rescore
- 2026-06-10 22:15 UTCEPSS rescore
- 2026-06-07 15:22 UTCEPSS rescore
- 2026-06-07 15:22 UTCEPSS rescore
- 2026-06-06 21:29 UTCOSV refresh
- 2026-06-06 13:45 UTCEPSS rescore
- 2026-06-05 06:08 UTCEPSS rescore
- 2026-06-05 06:08 UTCEPSS rescore
- 2026-06-04 13:10 UTCEPSS rescore
- 2026-06-04 13:10 UTCEPSS rescore
- 2026-06-02 20:10 UTCEPSS rescore
- 2026-06-01 13:49 UTCEPSS rescore
- 2026-06-01 13:49 UTCEPSS rescore
- 2026-05-31 00:14 UTCEPSS rescore
- 2026-05-29 13:41 UTCEPSS rescore
- 2026-05-22 21:15 UTCEPSS rescore
- 2026-05-22 21:15 UTCEPSS rescore
- 2026-05-22 20:51 UTCEG score recompute
- 2026-05-22 20:51 UTCVendor advisory
- 2026-05-22 20:51 UTCGHSA enrichment
- 2026-05-21 22:40 UTCEPSS rescore
- 2026-05-21 22:36 UTCOSV refresh
- 2026-05-20 22:37 UTCEPSS rescore
- 2026-05-20 22:37 UTCEPSS rescore
- 2026-05-20 22:37 UTCEPSS rescore
- 2026-05-18 21:30 UTCEPSS rescore
- 2026-05-18 21:30 UTCEPSS rescore
Frequently asked(5)
What is CVE-2016-2118?
When was CVE-2016-2118 disclosed?
Is CVE-2016-2118 actively exploited?
What is the CVSS score of CVE-2016-2118?
How do I remediate CVE-2016-2118?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2016-2118
Is Your Infrastructure Affected by CVE-2016-2118?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.