CVE-2026-80229
When performing transfers via libcurl’s multi interface, pooled TLS connections can outlive their originating easy handles. In OpenSSL 3 provider configurations, libcurl attaches an allocated library context to the easy handle's state and passes it to OpenSSL without acquiring an ownership reference; destroying the easy handle prematurely frees this context while the active connection retains a dangling pointer, leading to a heap-use-after-free upon subsequent I/O or post-handshake operations.
- Published Sep 6, 2026
- CVSS 7.5 high
- 0.6% chance of exploitation in the next 30 days (EPSS)
- Public exploit code is available
- A fix is available