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Vulnerability record · CVE-2025-0665 · published 5 February 2025

CVE-2025-0665: Haxx curl vulnerability

Haxx · Curl

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

7.0 CVSS 3.1 High EPSS 1.3% · top 28.6%
7.0CVSS 3.1 base score
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
8References, 1 tagged exploit
15 Oct 2026Last modified by NVD

Description

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

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H

Affected products

7 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://curl.se/docs/CVE-2025-0665.html Vendor Advisory
https://curl.se/docs/CVE-2025-0665.json Vendor Advisory
https://hackerone.com/reports/2954286 ExploitIssue TrackingThird Party Advisory
http://www.openwall.com/lists/oss-security/2025/02/05/2 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2025/02/05/5 Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20250306-0007/ Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-089022.html
https://cert-portal.siemens.com/productcert/html/ssa-398330.html

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-0665), CISA KEV, FIRST EPSS (scores of 2026-11-14). This page is refreshed as NVD updates the record.