CVE-2026-80229
highpriority · track · 0EPSS 0.006 · 47 %ileDEFRUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (9)
Products and version ranges known to be affected.
advisories (4)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-3149cURL: Mehrere SchwachstellenDeutsch2026-09-01csaf · cert_bundDE
Ein entfernter Angreifer kann mehrere Schwachstellen in cURL ausnutzen, um Sicherheitsmechanismen zu umgehen, Informationen offenzulegen und einen Denial-of-Service-Zustand herbeizuführen.
- WID-SEC-W-2026-3642Meinberg LANTIME: Mehrere SchwachstellenDeutsch2026-09-29csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Meinberg LANTIME ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten offenzulegen oder zu manipulieren, Denial-of-Service-Zustände herbeizuführen, sowie weitere, nicht näher spezifizierte Angriffe zu starten.
- CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
- CURL-CVE-2026-80229OpenSSL provider use-after-free2026-09-02vendor · osvUS
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.
sources
Which sources assert this record, and when.
references (3) nvd
External citations — patches, advisories, analysis.
- https://curl.se/docs/CVE-2026-80229.htmlPatchVendor Advisory
- https://curl.se/docs/CVE-2026-80229.jsonVendor Advisory
- https://hackerone.com/reports/3969255ExploitMitigationThird Party Advisory
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