OpenSSL provider use-after-free
Summary
| CVE | CVE-2026-80229 |
|---|---|
| State | PUBLISHED |
| Assigner | curl |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-06 18:17:22 UTC |
| Updated | 2026-09-06 18:17:22 UTC |
| 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. |
Risk And Classification
Problem Types: CWE-416 Use After Free
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Curl | Curl | affected 8.21.0 8.21.0 semver | Not specified |
| CNA | Curl | Curl | affected 8.20.0 8.20.0 semver | Not specified |
| CNA | Curl | Curl | affected 8.19.0 8.19.0 semver | Not specified |
| CNA | Curl | Curl | affected 8.18.0 8.18.0 semver | Not specified |
| CNA | Curl | Curl | affected 8.17.0 8.17.0 semver | Not specified |
| CNA | Curl | Curl | affected 8.16.0 8.16.0 semver | Not specified |
| CNA | Curl | Curl | affected 8.15.0 8.15.0 semver | Not specified |
| CNA | Curl | Curl | affected 8.14.1 8.14.1 semver | Not specified |
| CNA | Curl | Curl | affected 8.14.0 8.14.0 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| curl.se/docs/CVE-2026-80229.json | 2499f714-1537-4658-8207-48ae4bb9eae9 | curl.se | |
| hackerone.com/reports/3969255 | 2499f714-1537-4658-8207-48ae4bb9eae9 | hackerone.com | |
| curl.se/docs/CVE-2026-80229.html | 2499f714-1537-4658-8207-48ae4bb9eae9 | curl.se | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Stanislav Fort (Aisle Research) (en)
CNA: Daniel Stenberg (en)
There are currently no legacy QID mappings associated with this CVE.