PT-2025-5689 · Libcurl+3 · Libcurl+3

Andy Pan + 2 · CVE-2025-0665 · Published 2025-01-23 · Updated 2026-05-18

Positive Technologies (AI Summary)

CVSS v2.0

7.5

High

Base vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Name of the Vulnerable Software and Affected Versions: libcurl (affected versions not specified)

Description: The issue arises when libcurl wrongly closes the same eventfd file descriptor twice after completing a threaded name resolve and taking down a connection channel. This problem occurs due to incorrect handling of the eventfd file descriptor.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Integer Overflow

Multiple Releases of Same Resource or Handle

Weakness Enumeration

CWE-680

CWE-190

CWE-1341

Related Identifiers

ALT-PU-2025-10235

ALT-PU-2025-2425

ALT-PU-2025-2652

AZL-56692

BDU:2025-01585

BDU:2025-02320

CLEANSTART-2026-AY18527

CLEANSTART-2026-BW46578

CLEANSTART-2026-DI23929

CLEANSTART-2026-LQ42192

CLEANSTART-2026-OF85770

CVE-2025-0665

JLSEC-2026-421

MGASA-2025-0123

OPENSUSE-SU-2025:14809-1

SUSE-SU-2025:03198-1

SUSE-SU-2025:20239-1

SUSE-SU-2025_03198-1

Affected Products

Alt Linux

Red Os

Suse

Libcurl

References · 340

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/0xxx/CVE-2025-0665.json · Exploit
• 🔥 https://hackerone.com/reports/2954286 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-22898 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-0665 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-27534 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-0725 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-8096 · Security Note
• https://advisories.mageia.org/MGAA-2025-0004.html · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-38546 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2018-16842 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-4947 · Security Note
• https://osv.dev/vulnerability/CLEANSTART-2026-DI23929 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2016-5419 · Security Note
• https://osv.dev/vulnerability/CURL-CVE-2025-0665 · Vendor Advisory
• https://curl.se/docs/CVE-2025-0665.html · Vendor Advisory