Description (CNA)
HTTP/2 servers could end up crashing due to inadvertently modifying its HPACK encoder concurrently. This happens because the server modifies the HPACK encoder from two goroutines without synchronization: one uses the encoder to encode a HEADERS frame as part of a response sent to a client and the other modifies the encoder's table size when handling a SETTINGS frame containing SETTINGS_HEADER_TABLE_SIZE that a client sends. A malicious client can repeatedly send a request while changing the header table size to crash the server.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Go standard library / net/http | affected 0 before 1.26.9 |
| Go standard library / net/http/internal/http2 | affected 1.27.0-0 before 1.27.2 |
| golang.org/x/net / golang.org/x/net/http2 | affected 0 before 0.60.0 |
CWE
No CWE identifiers supplied.
References
- https://go.dev/cl/847188
- https://go.dev/cl/847313
- https://go.dev/issue/81867
- https://groups.google.com/g/golang-announce/c/U2fTuyDJznI
- https://groups.google.com/g/golang-announce/c/ZPwCyRUuGBs
- https://pkg.go.dev/vuln/GO-2026-6617
ADP enrichment
No English description supplied.
No references supplied.