VULNERABILITY INTELLIGENCE

CVE-2023-27537

CVSS score5.9 MEDIUM
EPSS probability1.90%
CISA KEVNot currently listed
Published2023-03-30
Last modified2026-10-23
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

A double free vulnerability exists in libcurl <8.0.0 when sharing HSTS data between separate "handles". This sharing was introduced without considerations for do this sharing across separate threads but there was no indication of this fact in the documentation. Due to missing mutexes or thread locks, two threads sharing the same HSTS data could end up doing a double-free or use-after-free.

Weakness classification

  • support@hackerone.com: CWE-415
  • nvd@nist.gov: CWE-415

Primary references