MEDIUM 5.9 Microsoft

CVE-2023-27537

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.

Microsoft Security Update 2023-Mar: 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.

Affected Products

References

Published: 2023-03-14 · Source: Microsoft · Feed updated: 2026-09-17
This medium severity vulnerability with a CVSS score of 5.9 was published on 2023-03-14 via Microsoft. Affected: cbl2 rust 1.72.0-2 on CBL Mariner 2.0, cbl2 mysql 8.0.33-1 on CBL Mariner 2.0, azl3 tensorflow 2.16.1-1 on Azure Linux 3.0 and 3 more.
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