CVE-2026-97031 — Reject malformed ECH outer extension references in crypto/tls
Multiple ECH outer extension references are not permitted under RFC 9849; previously, a client could send a well-crafted packet that could trigger memory exhaustion in the serve…
Published: 2026-10-08 · CVSS: 7.5 · CVSS 3.1
Multiple ECH outer extension references are not permitted under RFC 9849; previously, a client could send a well-crafted packet that could trigger memory exhaustion in the server process by specifying multiple references. We now reject these as malformed and curb the memory amplification vector as a result.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7