CVE-2018-1050: All versions of Samba from 4.0.0 onwards are vulnerable to a denial of service attack when the RPC spoolss service is configured to be run as an external daemon

Distribution release	Source package	Vendor state	Fixed version	Evidence
Alpine v3.23v3.23 · main	`samba`	Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.	`4.7.6-r0`	Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.22v3.22 · main	`samba`	Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.	`4.7.6-r0`	Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.21v3.21 · main	`samba`	Vendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.	`4.7.6-r0`	Alpine Security Database ↗Source updated 3 Oct 2026
Debian trixietrixie · source	`samba`	Vendor fix publishedDebian records a fixed source-package version for this release.	`2:4.7.4+dfsg-2`	Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · source	`samba`	Vendor fix publishedDebian records a fixed source-package version for this release.	`2:4.7.4+dfsg-2`	Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · source	`samba`	Vendor fix publishedDebian records a fixed source-package version for this release.	`2:4.7.4+dfsg-2`	Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · source	`samba`	Vendor fix publishedDebian records a fixed source-package version for this release.	`2:4.7.4+dfsg-2`	Debian Security Tracker ↗Source updated 5 Oct 2026

Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Mitigation available

What, why and how

All versions of Samba from 4.0.0 onwards are vulnerable to a denial of service attack when the RPC spoolss service is configured to be run as an external daemon. Missing input sanitization checks on some of the input parameters to spoolss RPC calls could cause the print spooler service to crash.

What

Why

The product dereferences a pointer that it expects to be valid but is NULL.

How

An attacker operating through the affected interface may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

Why

The product dereferences a pointer that it expects to be valid but is NULL.

How

An attacker operating through the affected interface may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path: the affected interface → NULL Pointer Dereference → disrupt the affected service
Attack surface: Unspecified
Privileges required: None: unauthenticated exploitation is possible
User interaction: None
Attack complexity: Low: no specialised conditions are recorded
Security boundary: Unchanged: impact remains within the vulnerable component's security authority
Weakness ? CWE means Common Weakness Enumeration: a standard category for the underlying weakness.: CWE-476 ↗
CWE-476: NULL Pointer Dereference. The product dereferences a pointer that it expects to be valid but is NULL.
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVAdjacentAttack vector: The attacker must be on an adjacent or logically close network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.ALowAvailability impact: A successful attack can cause a limited loss.
Post-exploitation / living off the land: No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.

UnauthenticatedDenial of serviceCWE-476

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2018-11704Official EUVD mapping

0 linked advisory records.

Official EUVD record ↗

Canadian Centre for Cyber Security · English · AV18-041Samba security updates

Samba has released updates to address multiple security vulnerabilities. Exploitation of these vulnerabilities may allow an attacker to bypass certain security restrictions and perform unauthorized actions. Such actions may include modifying passwords from other users and causing denial of service. Affected Versions: - Samba 4.7.5 and prior versions - Samba 4.6.13 and prior versions - Samba 4.5.15 and prior versions CVE References: CVE-2018-1050 and CVE-2018-1057

Official advisory ↗

CERT-FR · French · CERTFR-2019-AVI-014Multiples vulnérabilités dans les produits Juniper

/CVERecord?id=CVE-2017-3137 Référence CVE CVE-2017-3142 https://www.cve.org/CVERecord?id=CVE-2017-3142 Référence CVE CVE-2017-3143 https://www.cve.org/CVERecord?id=CVE-2017-3143 Référence CVE CVE-2017-3145 https://www.cve.org/CVERecord?id=CVE-2017-3145 Référence CVE CVE-2017-7375 https://www.cve.org/CVERecord?id=CVE-2017-7375 Référence CVE CVE-2018-0732 https://www.cve.org/CVERecord?id=CVE-2018-0732 Référence CVE CVE-2018-0737 https://www.cve.org/CVERecord?id=CVE-2018-0737 Référence CVE CVE-2018-1000004 https://www.cve.org/CVERecord?id=CVE-2018-1000004 Référence CVE CVE-2018-10301 https://www.cve.org/CVERecord?id=CVE-2018-10301 Référence CVE CVE-2018-1050 https://www.cve.org/CVERecord?id=CVE-2018-1050 Référence CVE CVE-2018-1064 https://www.cve.org/CVERecord?id=CVE-2018-1064 Référence CVE CVE-2018-10675 https://www.cve.org/CVERecord?id=CVE-2018-10675 Référence CVE CVE-2018-10872 https://www.cve.org/CVERecord?id=CVE-2018-10872 Référence CVE CVE-2018-10897 https://www.cve.org/CVERecord?id=CVE-2018-10897 Référence CVE CVE-2018-10901 https://www.cve.org/CVERecord?id=CVE-2018-10901 Référence CVE CVE-2018-10911 https://www.cve.org/CVERecord?id=CVE-2018-10911 Référence CVE CVE-2018-1124 https://www.cve.org/CVERecord?id=CVE-2018-1124 Référence CVE CVE-2018-1126 https://www.cve.org/CVERecord?id=CVE-20

Official advisory ↗

CERT-FR · French · CERTFR-2018-AVI-121Multiples vulnérabilités dans Samba

De multiples vulnérabilités ont été découvertes dans Samba. Elles permettent à un attaquant de provoquer un déni de service à distance, un contournement de la politique de sécurité et une élévation de privilèges.

Official advisory ↗

JVN iPedia · Japanese · JVNDB-2018-003046Samba における NULL ポインタデリファレンスに関する脆弱性

Samba には、NULL ポインタデリファレンスに関する脆弱性が存在します。

Official advisory ↗

KISA KrCERT/CC · Korean · KNVD-4846Samba 취약점 보안 업데이트 권고

스풀러 서비스가 중단될 수 있는 서비스 거부 취약점(CVE-2018-1050) [1]

Official advisory ↗

Patch and workaround

Operational remediation based on structured source evidence.

Status ? Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.: Mitigation available
Affected: Samba: All versions of Samba from 4.0.0 onwards
Fixed: No fixed version is explicitly recorded in the structured CVE data.
Action: Apply the mitigation in the linked authoritative guidance while planning the vendor's permanent fix.
Workaround: A mitigation or workaround reference is available from the source linked below; validate it against the affected product and version.

Evidence and provenance

Published 13 Mar 2018 · Last source change 16 Sept 2024, 23:16 UTC · CWE-476 · NULL Pointer Dereference

CVE recordCVE.org · 5.1

CVSS sourceNIST NVD

EPSS source

The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.

FIRST · tracked since 2026-09-01

European sourceENISA EUVD · EUVD-2018-11704

Product sourceCNA

Remediation sourceCVE/CNA references

CWE sourceCNA

NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

1 Sep 2026, 02:42 UTC
ENISA EUVD mappingEUVD-2018-11704 was added to the official ENISA EUVD mapping for this CVE.
Before
not recorded
After
{"euvdId":"EUVD-2018-11704"}
ENISA EUVD ↗
16 Sep 2024, 23:16 UTC
Vendor guidanceAuthoritative vendor guidance changed: added mitigation: samba.org/CVE-2018-1050.html; added remediation: samba.org/CVE-2018-1050.html; removed vendor advisory: access.redhat.com/RHSA-2018:1860; removed vendor advisory: access.redhat.com/RHSA-2018:1883; 7 further removals.
Before
vendor advisory: access.redhat.com/RHSA-2018:1860 · vendor advisory: access.redhat.com/RHSA-2018:1883 · vendor advisory: access.redhat.com/RHSA-2018:2612 · 6 more references
After
mitigation: samba.org/CVE-2018-1050.html · remediation: samba.org/CVE-2018-1050.html
samba.org ↗
16 Sep 2024, 23:16 UTC
Remediation statusRemediation status changed from Awaiting fix to Mitigation available.
Before
Awaiting fix
After
Mitigation available
samba.org ↗
16 Sep 2024, 23:16 UTC
SeveritySeverity changed from Unknown to Medium.
Before
Unknown
After
Medium
NIST NVD ↗
16 Sep 2024, 23:16 UTC
CVSS scoreCVSS score changed from not recorded to 4.3 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).
Before
not recorded
After
4.3 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
NIST NVD ↗
16 Sep 2024, 23:16 UTC
Catalogue recordCVE added to the BlackTree catalogue.
CNA ↗

2018-03-13CVE published

2024-09-16Mitigation reference recorded

ENISA EUVD · EUVD-2018-11704↗Mitigation reference↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗

Technical terms and abbreviations used in this report

CVE: Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS: Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS: Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE: Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA: CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP: Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD: National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT: A computer security incident response team that publishes warnings or coordinates incident response.
PoC: Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF: Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL: Living off the land: abuse of legitimate tools or system functions during an attack.

All versions of Samba from 4.0.0 onwards are vulnerable to a denial of service attack when the RPC spoolss service is configured to be run as an external daemon

Published severity in operational context

Evidence used

Compensating controls

Verification

Release-specific package status

National CERT insights
?
CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

ENISA European Vulnerability Database

EUVD-2018-11704

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

What changed after publication