CVE-2025-0665
CVE-2025-0665 is a high-severity vulnerability in Haxx Curl with a CVSS 3.x base score of 7.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: High (CVSS 3.x base score 7.0)
- EPSS exploit prediction: 1% (66th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-1809
- Affected product: Haxx Curl
- Published:
- Last modified:
Description
libcurl would wrongly close the same eventfd file descriptor twice when taking down a connection channel after having completed a threaded name resolve.
Frequently asked questions
- What is CVE-2025-0665?
- libcurl would wrongly close the same eventfd file descriptor twice when taking down a connection channel after having completed a threaded name resolve.
- How severe is CVE-2025-0665?
- CVE-2025-0665 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.
- Is CVE-2025-0665 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-0665?
- CVE-2025-0665 primarily affects Haxx Curl. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2025-0665?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-0665 have an EU (EUVD) identifier?
- Yes. CVE-2025-0665 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-1809.
- When was CVE-2025-0665 published?
- CVE-2025-0665 was published on 2025-02-05 and last updated on 2026-06-17.
References
- https://curl.se/docs/CVE-2025-0665.html
- https://curl.se/docs/CVE-2025-0665.json
- https://hackerone.com/reports/2954286
- http://www.openwall.com/lists/oss-security/2025/02/05/2
- http://www.openwall.com/lists/oss-security/2025/02/05/5
- https://security.netapp.com/advisory/ntap-20250306-0007/
Affected products (7)
- cpe:2.3:a:haxx:curl:8.11.1:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:bootstrap_os:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
More vulnerabilities in Haxx Curl
- CVE-2026-9079 — Critical (CVSS 9.8): libcurl had a flaw that when instructed to clear proxy authentication credentials which made it not do so, leaving the…
- CVE-2026-8925 — Critical (CVSS 9.8): The curl logic that works with SASL authentication could end up cleaning up the GSASL context *twice* without clearing…
- CVE-2026-11856 — Critical (CVSS 9.8): Successfully using libcurl to do a transfer to a specific HTTP origin (`hostA`) with **Digest** authentication and then…
- CVE-2026-10536 — Critical (CVSS 9.8): A use-after-free vulnerability exists in libcurl when an application configures an HTTP/2 stream-dependency tree via…
- CVE-2022-32221 — Critical (CVSS 9.8): When doing HTTP(S) transfers, libcurl might erroneously use the read callback (`CURLOPT_READFUNCTION`) to ask for data…
- CVE-2022-32207 — Critical (CVSS 9.8): When curl < 7.84.0 saves cookies, alt-svc and hsts data to local files, it makes the operation atomic by finalizing the…