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Full vulnerability report · 2025
CVE-2025-0665High confidence

eventfd double close

curl · curl

7.0HighCVSS 3.1
Recommended action
Within 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

3 current
CVE-2025-0665 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitylibcurl: Double Close of Eventfd in libcurl
31 known not affected

The vendor explicitly states that these products are not affected by this CVE.

  • curl as a component of Red Hat Enterprise Linux 10
  • curl.src as a component of Red Hat Enterprise Linux 10
  • libcurl as a component of Red Hat Enterprise Linux 10
  • libcurl-devel as a component of Red Hat Enterprise Linux 10
  • libcurl-minimal as a component of Red Hat Enterprise Linux 10
  • snphost.src as a component of Red Hat Enterprise Linux 10
  • trustee-guest-components.src as a component of Red Hat Enterprise Linux 10
  • curl as a component of Red Hat Enterprise Linux 6
  • curl.src as a component of Red Hat Enterprise Linux 6
  • libcurl as a component of Red Hat Enterprise Linux 6
  • libcurl-devel as a component of Red Hat Enterprise Linux 6
  • curl as a component of Red Hat Enterprise Linux 7
Summary
A flaw was found in libcurl. This vulnerability allows an attacker to trigger a double-close of an eventfd file descriptor via a connection teardown after a threaded name resolution, potentially leading to undefined behavior or a denial of service.
Remediation
No remediation text is recorded.
SSA-089022 · CSAF 2.0 · revision 2 · interimSiemens ProductCERTSSA-089022: Multiple Vulnerabilities in Third-Party Components in SINEC OS before V3.3
16 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • RUGGEDCOM RST2428P (6GK6242-6PA00)
  • SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family
  • SCALANCE XCH328 (6GK5328-4TS01-2EC2)
  • SCALANCE XCM324 (6GK5324-8TS01-2AC2)
  • SCALANCE XCM328 (6GK5328-4TS01-2AC2)
  • SCALANCE XCM332 (6GK5332-0GA01-2AC2)
  • SCALANCE XRH334 (24 V DC, 8xFO, CC) (6GK5334-2TS01-2ER3)
  • SCALANCE XRM334 (230 V AC, 12xFO) (6GK5334-3TS01-3AR3)
  • SCALANCE XRM334 (230 V AC, 8xFO) (6GK5334-2TS01-3AR3)
  • SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-3AR3)
  • SCALANCE XRM334 (24 V DC, 12xFO) (6GK5334-3TS01-2AR3)
  • SCALANCE XRM334 (24 V DC, 8xFO) (6GK5334-2TS01-2AR3)
Summary
libcurl would wrongly close the same eventfd file descriptor twice when taking down a connection channel after having completed a threaded name resolve.
Remediation
Update to V3.3 or later version
SSA-398330 · CSAF 2.0 · revision 18 · interimSiemens ProductCERTSSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5
5 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)
  • SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)
  • SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)
  • SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)
  • SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)
Summary
libcurl would wrongly close the same eventfd file descriptor twice when taking down a connection channel after having completed a threaded name resolve.
Remediation
Update to V3.1.5 or later version
Optional official sources

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

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2025-1809

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

libcurl would wrongly close the same eventfd file descriptor twice when taking down a connection channel after having completed a threaded name resolve.

What

libcurl would wrongly close the same eventfd file descriptor twice when taking down a connection channel after having completed a threaded name resolve.

Why

The product attempts to close or release a resource or handle more than once, without any successful open between the close operations.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

libcurl would wrongly close the same eventfd file descriptor twice when taking down a connection channel after having completed a threaded name resolve.

Why

The product attempts to close or release a resource or handle more than once, without any successful open between the close operations.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

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.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
a network path → Multiple Releases of Same Resource or Handle → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
High: exploitation depends on specific conditions
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-1341 ↗

CWE-1341: Multiple Releases of Same Resource or Handle. The product attempts to close or release a resource or handle more than once, without any successful open between the close operations.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.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.CLowConfidentiality impact: A successful attack can cause a limited loss.ILowIntegrity impact: A successful attack can cause a limited loss.AHighAvailability impact: A successful attack can cause a major 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.
NetworkUnauthenticatedCWE-1341Public exploit reference
A

Official authority intelligence

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

BSI · German · WID-SEC-W-2025-0270cURL: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in cURL ausnutzen, um Informationen offenzulegen, einen Denial of Service Zustand herbeizuführen und um nicht näher bekannte Auswirkungen zu erzielen.

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0218Multiples vulnérabilités dans les produits VMware

.cve.org/CVERecord?id=CVE-2024-8088 Référence CVE CVE-2024-8096 https://www.cve.org/CVERecord?id=CVE-2024-8096 Référence CVE CVE-2024-8176 https://www.cve.org/CVERecord?id=CVE-2024-8176 Référence CVE CVE-2024-8244 https://www.cve.org/CVERecord?id=CVE-2024-8244 Référence CVE CVE-2024-9143 https://www.cve.org/CVERecord?id=CVE-2024-9143 Référence CVE CVE-2024-9287 https://www.cve.org/CVERecord?id=CVE-2024-9287 Référence CVE CVE-2024-9681 https://www.cve.org/CVERecord?id=CVE-2024-9681 Référence CVE CVE-2025-0167 https://www.cve.org/CVERecord?id=CVE-2025-0167 Référence CVE CVE-2025-0395 https://www.cve.org/CVERecord?id=CVE-2025-0395 Référence CVE CVE-2025-0665 https://www.cve.org/CVERecord?id=CVE-2025-0665 Référence CVE CVE-2025-0725 https://www.cve.org/CVERecord?id=CVE-2025-0725 Référence CVE CVE-2025-0840 https://www.cve.org/CVERecord?id=CVE-2025-0840 Référence CVE CVE-2025-0913 https://www.cve.org/CVERecord?id=CVE-2025-0913 Référence CVE CVE-2025-0938 https://www.cve.org/CVERecord?id=CVE-2025-0938 Référence CVE CVE-2025-10148 https://www.cve.org/CVERecord?id=CVE-2025-10148 Référence CVE CVE-2025-10911 https://www.cve.org/CVERecord?id=CVE-2025-10911 Référence CVE CVE-2025-1094 https://www.cve.org/CVERecord?id=CVE-2025-1094 Référence CVE CVE-2025-10966 https://www.cve.org/CVERecord?id=CVE-2025-10

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0101Multiples vulnérabilités dans les produits Siemens

e.org/CVERecord?id=CVE-2024-47619 Référence CVE CVE-2024-52533 https://www.cve.org/CVERecord?id=CVE-2024-52533 Référence CVE CVE-2024-6197 https://www.cve.org/CVERecord?id=CVE-2024-6197 Référence CVE CVE-2024-6874 https://www.cve.org/CVERecord?id=CVE-2024-6874 Référence CVE CVE-2024-7264 https://www.cve.org/CVERecord?id=CVE-2024-7264 Référence CVE CVE-2024-8006 https://www.cve.org/CVERecord?id=CVE-2024-8006 Référence CVE CVE-2024-8096 https://www.cve.org/CVERecord?id=CVE-2024-8096 Référence CVE CVE-2024-9681 https://www.cve.org/CVERecord?id=CVE-2024-9681 Référence CVE CVE-2025-0167 https://www.cve.org/CVERecord?id=CVE-2025-0167 Référence CVE CVE-2025-0665 https://www.cve.org/CVERecord?id=CVE-2025-0665 Référence CVE CVE-2025-0725 https://www.cve.org/CVERecord?id=CVE-2025-0725 Référence CVE CVE-2025-10148 https://www.cve.org/CVERecord?id=CVE-2025-10148 Référence CVE CVE-2025-1390 https://www.cve.org/CVERecord?id=CVE-2025-1390 Référence CVE CVE-2025-27587 https://www.cve.org/CVERecord?id=CVE-2025-27587 Référence CVE CVE-2025-32433 https://www.cve.org/CVERecord?id=CVE-2025-32433 Référence CVE CVE-2025-3360 https://www.cve.org/CVERecord?id=CVE-2025-3360 Référence CVE CVE-2025-38084 https://www.cve.org/CVERecord?id=CVE-2025-38084 Référence CVE CVE-2025-38085 https://www.cve.org/CVERecord?id=CVE-202

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0328Multiples vulnérabilités dans Tenable Security Center

De multiples vulnérabilités ont été découvertes dans Tenable Security Center. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et une atteinte à la confidentialité des données.

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0150Multiples vulnérabilités dans Tenable Identity Exposure

De multiples vulnérabilités ont été découvertes dans Tenable Identity Exposure. Certaines d'entre elles permettent à un attaquant de provoquer un déni de service à distance, une atteinte à la confidentialité des données et un problème de sécurité non spécifié par l'éditeur.

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0102Multiples vulnérabilités dans les produits Tenable

De multiples vulnérabilités ont été découvertes dans les produits Tenable. Entre elles permettent à un attaquant de provoquer un déni de service à distance, une atteinte à la confidentialité des données et un contournement de la politique de sécurité.

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0098Multiples vulnérabilités dans les produits Curl

De multiples vulnérabilités ont été découvertes dans les produits Curl. Elles permettent à un attaquant de provoquer une atteinte à la confidentialité des données et un problème de sécurité non spécifié par l'éditeur.

Official advisory
NCSC-NL · Dutch · NCSC-2025-0246Kwetsbaarheden verholpen in Siemens producten

De kwetsbaarheden stellen een kwaadwillende mogelijk in staat aanvallen uit te voeren die kunnen leiden tot de volgende categorieën schade: * Denial-of-Service (DoS) * Cross-Site Scripting * Manipulatie van gegevens * Omzeilen van een beveiligingsmaatregel * (Remote) code execution (SYSTEM rechten) * (Remote) code execution (Gebruikersrechten) * Toegang tot gevoelige gegevens * Verhogen van rechten De kwaadwillende heeft hiervoor toegang nodig tot de productieomgeving. Het is goed gebruik een dergelijke omgeving niet publiek toegankelijk te hebben.

Official advisory
03

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.
Patch available
Affected
RUGGEDCOM RST2428P (6GK6242-6PA00); SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family; SCALANCE XCH328 (6GK5328-4TS01-2EC2); SCALANCE XCM324 (6GK5324-8TS01-2AC2); SCALANCE XCM328 (6GK5328-4TS01-2AC2); SCALANCE XCM332 (6GK5332-0GA01-2AC2); SCALANCE XRH334 (24 V DC, 8xFO, CC) (6GK5334-2TS01-2ER3); SCALANCE XRM334 (230 V AC, 12xFO) (6GK5334-3TS01-3AR3); SCALANCE XRM334 (230 V AC, 8xFO) (6GK5334-2TS01-3AR3); SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-3AR3); SCALANCE XRM334 (24 V DC, 12xFO) (6GK5334-3TS01-2AR3); SCALANCE XRM334 (24 V DC, 8xFO) (6GK5334-2TS01-2AR3); SCALANCE XRM334 (24V DC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-2AR3); SCALANCE XRM334 (2x230 V AC, 12xFO) (6GK5334-3TS01-4AR3); SCALANCE XRM334 (2x230 V AC, 8xFO) (6GK5334-2TS01-4AR3); SCALANCE XRM334 (2x230V AC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-4AR3)
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
Update to V3.3 or later version
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 5 Feb 2025 · Last source change 17 Mar 2026, 17:42 UTC · CWE-1341 · Multiple Releases of Same Resource or Handle

CVE recordCVE.org · 5.2
CVSS sourceCISA ADP
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2025-1809
Product sourceVendor CSAF · Siemens ProductCERT
Remediation sourceVendor CSAF · Siemens ProductCERT
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 →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2025-1809↗Vendor CSAF · Siemens ProductCERT↗CVE authority or vendor reference↗Vendor advisory↗Public exploit 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.
Free version - for non-commercial use only.CVE-2025-0665 · cve.blacktree.nl