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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Curl
  • Curl

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References
Link Providers
https://curl.se/docs/CVE-2026-80229.html cve-icon cve-icon
https://curl.se/docs/CVE-2026-80229.json cve-icon cve-icon
https://hackerone.com/reports/3969255 cve-icon cve-icon
History

Tue, 08 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Sun, 06 Sep 2026 20:15:00 +0000

Type Values Removed Values Added
First Time appeared Curl
Curl curl
Vendors & Products Curl
Curl curl

Sun, 06 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Sun, 06 Sep 2026 18:00:00 +0000

Type Values Removed Values Added
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.
Title OpenSSL provider use-after-free
References
cve-icon MITRE

Status: PUBLISHED

Assigner: curl

Published: 2026-09-06T17:47:59.510Z

Updated: 2026-09-08T15:43:53.519Z

Reserved: 2026-08-26T04:24:23.168Z

Link: CVE-2026-80229

cve-icon Vulnrichment

Updated: 2026-09-08T15:43:49.684Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-09-06T18:17:22.217

Modified: 2026-09-08T16:18:15.720

Link: CVE-2026-80229

cve-icon Redhat

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