CVEvulnerability
CVE-2026-80229
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2026-09-06
- Last modified
- 2026-09-15
- Assigner
- 2499f714-1537-4658-8207-48ae4bb9eae9
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-416
Description
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.
Affected configurations
• haxx curl (>= 8.14.0 < 8.22.0)
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://curl.se/docs/CVE-2026-80229.html Patch, Vendor Advisory
- https://curl.se/docs/CVE-2026-80229.json Vendor Advisory
- https://hackerone.com/reports/3969255 Exploit, Mitigation, Third Party Advisory