Unrated
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 server process by specifying multiple references. We now reject these as malformed and curb the memory amplification vector as a result.
Announced Group revision 1
Original source ↗CVE-2026-97031
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-97031
crypto/tls
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Go standard library",
"product": "crypto/tls",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "1.26.9",
"versionType": "semver"
},
{
"status": "affected",
"version": "1.27.0-0",
"lessThan": "1.27.2",
"versionType": "semver"
}
],
"packageName": "crypto/tls",
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"programRoutines": [
{
"name": "decodeInnerClientHello"
},
{
"name": "Conn.Handshake"
},
{
"name": "Conn.HandshakeContext"
},
{
"name": "Conn.Read"
},
{
"name": "Conn.Write"
},
{
"name": "Dial"
},
{
"name": "DialWithDialer"
},
{
"name": "Dialer.Dial"
},
{
"name": "Dialer.DialContext"
},
{
"name": "QUICConn.Start"
}
]
}
]- Related CVEs
- CVE-2026-97031
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #16341 · Revision 1
- Added to Heist Feed
- Publisher date