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.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade golang-testsUpgrade golang-binUpgrade golang-docsUpgrade golang-raceUpgrade delveUpgrade go-toolsetUpgrade golang-srcUpgrade golangUpgrade golang-misc | Oct 25, 2026 | Oct 20, 2026 |
| Alpine Linux | — | Upgrade dockerUpgrade go | Oct 15, 2026 | Oct 8, 2026 |
| Amazon_linux_2023 | — | Upgrade golang-miscUpgrade golangUpgrade golang-srcUpgrade golang-sharedUpgrade golang-docsUpgrade golang-testsUpgrade golang-bin | Oct 28, 2026 | Oct 8, 2026 |
| Redhat_linux | — | Upgrade golang-testsUpgrade go-toolsetUpgrade golang-miscNo solution existsUpgrade golang-docsUpgrade golangUpgrade delveUpgrade golang-srcUpgrade golang-raceUpgrade golang-binUpgrade delve-debuginfoUpgrade delve-debugsource | Oct 13, 2026 | Oct 8, 2026 |
| Rocky_linux | — | Upgrade go-toolsetUpgrade golangUpgrade delve-debuginfoUpgrade golang-raceUpgrade delveUpgrade delve-debugsourceUpgrade golang-bin | Oct 26, 2026 | Oct 21, 2026 |
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