When curl is built with GnuTLS, a malicious WebSocket server can make curl send memory past its send buffer. This is due to an out of bounds read following when `gnutls_record_send()` returns a number of bytes sent **greater than the number of bytes it was given to send**. GnuTLS does that after a blocked send.
Fix
Vendor advisories in the News 2
- USN-8927-2: curl vulnerabilities Ubuntu Security Notices · 2026-10-19
- USN-8927-1: curl vulnerabilities Ubuntu Security Notices · 2026-10-14
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 3
- StatusPublished → Awaiting AnalysisNVD modified 2026-10-22 16:57
- StatusReceived → PublishedNVD modified 2026-10-20 20:28
- First seenunscoredNVD modified 2026-10-20 21:17
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.