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.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.5
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS probability
- 0.90%
- CWE
- CWE-416
- Published
- 2026-09-06
- Last modified
- 2026-09-16
Affected products
- curl curl
- curl curl
- curl curl
- curl curl
- curl curl
- curl curl
- curl curl
- curl curl
Weakness type
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