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CVE-2026-80229— OpenSSL provider use-after-free

Quick assessment

Affected
curl curl
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

curl是瑞典curl团队开源的一款用于从服务器传输数据或向服务器传输数据的工具。 curl 8.21.0版本、8.20.0版本、8.19.0版本、8.18.0版本、8.17.0版本、8.16.0版本、8.15.0版本、8.14.1版本和8.14.0版本存在资源管理错误漏洞，该漏洞源于通过libcurl的multi接口执行传输时，在OpenSSL 3 provider配置下，libcurl将已分配的库上下文附加到easy handle状态并传递给OpenSSL，但未获取所有权引用，过早销毁easy han

AI Predicted 7.5 Difficulty: Hard EPSS 0.90% · P58

Possible ATT&CK Techniques 1 AI

T1204 · User Execution

Affected Version Matrix 14

VendorProduct Version RangeStatus
curl curl 8.14.0< 8.14.2 affected
8.15.0< 8.16.1 affected
8.17.0< 8.20.1 affected
8.21.0< 8.22.0 affected
f2ce6c46b9dcc46ced0ce43fa95176ea7599a854< 7ea37abc6ac0120ba5f6d94be8d196f7cf1506bb affected
8.21.0 affected
8.20.0 affected
8.19.0 affected
… +6 more rows
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I. Basic Information for CVE-2026-80229

Vulnerability Information
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Vulnerability Title
OpenSSL provider use-after-free
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
curl 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
curl是瑞典curl团队开源的一款用于从服务器传输数据或向服务器传输数据的工具。 curl 8.21.0版本、8.20.0版本、8.19.0版本、8.18.0版本、8.17.0版本、8.16.0版本、8.15.0版本、8.14.1版本和8.14.0版本存在资源管理错误漏洞，该漏洞源于通过libcurl的multi接口执行传输时，在OpenSSL 3 provider配置下，libcurl将已分配的库上下文附加到easy handle状态并传递给OpenSSL，但未获取所有权引用，过早销毁easy han
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
curl curl 8.14.0 ~ 8.14.2 -
curl curl f2ce6c46b9dcc46ced0ce43fa95176ea7599a854 ~ 7ea37abc6ac0120ba5f6d94be8d196f7cf1506bb -
curl curl 8.21.0 -

II. Public POCs for CVE-2026-80229

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-80229

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Vendor Advisories for CVE-2026-80229 (1)

Proof of Concept for CVE-2026-80229 (1)

Vendor Pages for CVE-2026-80229 (1)

Same Patch Batch · curl · 2026-09-06 · 9 CVEs total

CVE-2026-82208 wolfSSL CA-cache hit overrides callback
CVE-2026-82209 domain-scoped PSL domain cookie
CVE-2026-18924 HTTP/2 server push UAF
CVE-2026-19931 Negotiate ambient user conn reuse
CVE-2026-80231 native CA store conn reuse
CVE-2026-80230 OpenSSL pinning bypass
CVE-2026-80255 secure cookie attribute bypass with tab
CVE-2026-13608 OpenLDAP SASL authentication bypass

IV. Related Vulnerabilities

Same product: curl
Same vendor: curl
Same weakness: CWE-416

V. Comments for CVE-2026-80229

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