CVE-2026-97031
CVE-2026-97031 · Reject malformed ECH outer extension references in crypto/tls
This page contains facts from public vulnerability sources. Check the original advisory before updating.
This page shows selected source facts. See the linked advisories for the complete description and affected versions.
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.
CVSS 7.5 · High · EPSS 0.5% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
crypto/tls
- Versions
- ≥ 0, < 1.26.9: Affected (semver)
- ≥ 1.27.0-0, < 1.27.2: Affected (semver)
Update to 1.26.9; Update to 1.27.2
golang-1.19 Debian:12
- Versions
- 1.19.10-1
- 1.19.10-2
- 1.19.11-1
- 1.19.12-1
- 1.19.12-2
- 1.19.12-2~bpo11+1
- 1.19.12-2~bpo12+1
- 1.19.13-1
- 1.19.13-1~bpo11+1
- 1.19.13-1~bpo12+1
- 1.19.8-2
- 1.19.9-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.24 Debian:13
- Versions
- 1.24.12-1
- 1.24.13-1
- 1.24.13-2
- 1.24.4-1
- 1.24.4-2
- 1.24.4-3
- 1.24.4-4
- 1.24.7-1
- 1.24.8-1
- 1.24.9-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.26 Debian:14
- Versions
- 1.26.0-1
- 1.26.1-1
- 1.26.2-1
- 1.26.2-2
- 1.26.2-3
- 1.26.3-1
- 1.26.3-1~bpo13+1
- 1.26.3-2
- 1.26.3-2~bpo13+1
- 1.26.4-1
- 1.26.4-1~bpo13+1
- 1.26.5-1
- 1.26.5-1~bpo13+1
- 1.26.6-1
- 1.26.6-2
- 1.26.7-1
- 1.26.7-1~bpo13+1
- 1.26.8-1
- 1.26.8-1~bpo13+1
- 1.26.8-2
- 1.26~rc2-1
- 1.26~rc3-1
- 1.26~rc3-2
- Affected ranges
- ECOSYSTEM: < 1.26.9-1
Update to 1.26.9-1
golang-1.27 Debian:14
- Versions
- 1.27.0-1
- 1.27.0-1~bpo13+1
- 1.27.1-1
- 1.27.1-2
- 1.27.1-2~bpo13+1
- 1.27~rc1-1
- 1.27~rc2-1
- 1.27~rc3-1
- Affected ranges
- ECOSYSTEM: < 1.27.2-1
Update to 1.27.2-1
golang-1.10 Ubuntu:14.04:LTS
- Versions
- 1.10.4-2ubuntu1~14.04.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.10 Ubuntu:16.04:LTS
- Versions
- 1.10.4-2ubuntu1~16.04.1
- 1.10.4-2ubuntu1~16.04.2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.6 Ubuntu:16.04:LTS
- Versions
- 1.6-0ubuntu1
- 1.6-0ubuntu2
- 1.6-0ubuntu3
- 1.6-0ubuntu4
- 1.6-0ubuntu5
- 1.6.1-0ubuntu1
- 1.6.2-0ubuntu5~16.04
- 1.6.2-0ubuntu5~16.04.2
- 1.6.2-0ubuntu5~16.04.3
- 1.6.2-0ubuntu5~16.04.4
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.13 Ubuntu:Pro:16.04:LTS
- Versions
- 1.13.8-1ubuntu1~16.04.2
- 1.13.8-1ubuntu1~16.04.3
- 1.13.8-1ubuntu1~16.04.3+esm2
- 1.13.8-1ubuntu1~16.04.3+esm3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.18 Ubuntu:Pro:16.04:LTS
- Versions
- 1.18.1-1ubuntu1~16.04.6
- 1.18.1-1ubuntu1~16.04.6+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.10 Ubuntu:18.04:LTS
- Versions
- 1.10~rc1-1
- 1.10~rc1-1ubuntu1
- 1.10~rc1-2ubuntu1
- 1.10~rc2-1ubuntu1
- 1.10-1ubuntu1
- 1.10.1-1ubuntu2
- 1.10.4-2ubuntu1~18.04.1
- 1.10.4-2ubuntu1~18.04.2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.13 Ubuntu:Pro:18.04:LTS
- Versions
- 1.13.8-1ubuntu1~18.04.2
- 1.13.8-1ubuntu1~18.04.3
- 1.13.8-1ubuntu1~18.04.4
- 1.13.8-1ubuntu1~18.04.4+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.16 Ubuntu:Pro:18.04:LTS
- Versions
- 1.16.2-0ubuntu1~18.04.2
- 1.16.2-0ubuntu1~18.04.2+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.18 Ubuntu:Pro:18.04:LTS
- Versions
- 1.18.1-1ubuntu1~18.04.3
- 1.18.1-1ubuntu1~18.04.4
- 1.18.1-1ubuntu1~18.04.4+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.8 Ubuntu:18.04:LTS
- Versions
- 1.8.3-2ubuntu1
- 1.8.3-2ubuntu1.18.04.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.9 Ubuntu:18.04:LTS
- Versions
- 1.9.1-2ubuntu1
- 1.9.2-1ubuntu1
- 1.9.2-3ubuntu1
- 1.9.3-1ubuntu1
- 1.9.4-1ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.13 Ubuntu:20.04:LTS
- Versions
- 1.13.1-1ubuntu1
- 1.13.3-1ubuntu1
- 1.13.4-1ubuntu1
- 1.13.5-1ubuntu1
- 1.13.6-1ubuntu1
- 1.13.6-2ubuntu1
- 1.13.7-1ubuntu1
- 1.13.8-1ubuntu1
- 1.13.8-1ubuntu1.1
- 1.13.8-1ubuntu1.2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.14 Ubuntu:20.04:LTS
- Versions
- 1.14~beta1-1
- 1.14~beta1-2
- 1.14~rc1-1
- 1.14-1
- 1.14.1-1
- 1.14.2-1
- 1.14.2-1ubuntu1
- 1.14.3-2ubuntu2~20.04.1
- 1.14.3-2ubuntu2~20.04.2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.16 Ubuntu:Pro:20.04:LTS
- Versions
- 1.16.2-0ubuntu1~20.04
- 1.16.2-0ubuntu1~20.04.1
- 1.16.2-0ubuntu1~20.04.1+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.18 Ubuntu:20.04:LTS
- Versions
- 1.18.1-1ubuntu1~20.04.1
- 1.18.1-1ubuntu1~20.04.2
- 1.18.1-1ubuntu1~20.04.3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.20 Ubuntu:20.04:LTS
- Versions
- 1.20.3-1ubuntu0.1~20.04
- 1.20.3-1ubuntu0.1~20.04.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.21 Ubuntu:20.04:LTS
- Versions
- 1.21.1-1~ubuntu20.04.1
- 1.21.1-1~ubuntu20.04.2
- 1.21.1-1~ubuntu20.04.3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.17 Ubuntu:22.04:LTS
- Versions
- 1.17-1ubuntu2
- 1.17.3-1ubuntu1
- 1.17.3-1ubuntu2
- 1.17.13-3ubuntu1
- 1.17.13-3ubuntu1.2
- 1.17.13-3ubuntu1.3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-1.18 Ubuntu:22.04:LTS
- Versions
- 1.18~beta1-0ubuntu1
- 1.18~beta2-1ubuntu1
- 1.18~beta2-1ubuntu2
- 1.18~rc1-1ubuntu1
- 1.18-1ubuntu1
- 1.18.1-1ubuntu1
- 1.18.1-1ubuntu1.1
- 1.18.1-1ubuntu1.2
- 1.18.1-1ubuntu1.3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published