CVE-2026-97031
Reject malformed ECH outer extension references in crypto/tls
CVE-2026-97031 is fixed in 26 products on 2 platforms, first by DEBIAN-CVE-2026-97031, released October 12, 2026. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 2 platforms
CVSS
7.5
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0072
53rd percentile
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Go Programming Language | 1.27.3 | Go Programming Language 1.27.3 | Oct 19, 2026 |
| Linux | |||
| delve · RHEL 10 | 1.26.1-3.el10_0 | RHSA-2026:89884 | Oct 27, 2026 |
| delve · RHEL 8 | 0:1.26.1-1.module+el8.10.0+24516+40554724 | RHSA-2026:86203 | Oct 21, 2026 |
| delve · almalinux 10 | 1.26.1-3.el10_2 | ALSA-2026:95519 | Nov 7, 2026 |
| delve · almalinux 8 | 1.26.1-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 | Nov 7, 2026 |
| delve · almalinux 9 | 1.26.1-2.el9_8 | ALSA-2026:95518 | Nov 7, 2026 |
| delve · ol 10 | 0:1.26.1-3.0.1.el10_2 | ELSA-2026-95519 | Nov 7, 2026 |
| delve · ol 8 | 0:1.26.1-1.0.1.module+el8.10.0+91008+b9491da4 | ELSA-2026-86203 | Nov 7, 2026 |
| delve · ol 9 | 0:1.26.1-2.0.1.el9_8 | ELSA-2026-95518 | Nov 7, 2026 |
| delve · rocky 10 | 0:1.26.1-3.el10_2 | RLSA-2026:95519 | Nov 7, 2026 |
| delve · rocky 8 | 0:1.26.1-1.module+el8.10.0+40244+e7cb3ff8 | RLSA-2026:86203 | Nov 7, 2026 |
| delve · rocky 9 | 0:1.26.1-2.el9_8 | RLSA-2026:95518 | Nov 7, 2026 |
| go-toolset · RHEL 8 | 0:1.26.10-1.module+el8.10.0+25107+6b50279c | RHSA-2026:86203 | Oct 21, 2026 |
| go-toolset · RHEL 9 | 0:1.26.10-1.el9_8 | RHSA-2026:86196 | Oct 21, 2026 |
| go-toolset · almalinux 10 | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 | Nov 7, 2026 |
| go-toolset · almalinux 8 | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 | Nov 7, 2026 |
| go-toolset · almalinux 9 | 1.26.10-1.el9_8 | ALSA-2026:86196 | Nov 7, 2026 |
| go-toolset · ol 10 | 0:1.26.10-1.0.1.el10_2 | ELSA-2026-86093 | Nov 7, 2026 |
| go-toolset · ol 8 | 0:1.26.10-1.0.1.module+el8.10.0+91075+4cd454b9 | ELSA-2026-86203 | Nov 7, 2026 |
| go-toolset · ol 9 | 0:1.26.10-1.0.1.el9_8 | ELSA-2026-86196 | Nov 7, 2026 |
| go1.26 · opensuse-leap 16.0 | 1.26.9-160000.1.1 | OPENSUSE-SU-2026:22095-1 | Nov 7, 2026 |
| go1.26 · sles 15.6 | 1.26.9-150000.1.33.1 | SUSE-SU-2026:4629-1 | Nov 7, 2026 |
| go1.26 · sles 15.7 | 1.26.9-150000.1.33.1 | SUSE-SU-2026:4629-1 | Nov 7, 2026 |
| go1.26 · sles 16.0 | 1.26.9-160000.1.1 | SUSE-SU-2026:24239-1 | Nov 7, 2026 |
| go1.26-openssl · sles 15.6 | 1.26.10-150600.13.18.1 | SUSE-SU-2026:4866-1 | Nov 7, 2026 |
| go1.26-openssl · sles 15.7 | 1.26.10-150600.13.18.1 | SUSE-SU-2026:4866-1 | Nov 7, 2026 |
| go1.27 · opensuse-leap 16.0 | 1.27.2-160000.1.1 | OPENSUSE-SU-2026:22093-1 | Nov 7, 2026 |
| go1.27 · sles 15.6 | 1.27.2-150000.1.12.1 | SUSE-SU-2026:4625-1 | Nov 7, 2026 |
| go1.27 · sles 15.7 | 1.27.2-150000.1.12.1 | SUSE-SU-2026:4625-1 | Nov 7, 2026 |
| go1.27 · sles 16.0 | 1.27.2-160000.1.1 | SUSE-SU-2026:24237-1 | Nov 7, 2026 |
| golang · RHEL 10 | 1.26.10-1.el10_0 | RHSA-2026:87040 | Oct 21, 2026 |
| golang · RHEL 8 | 0:1.26.10-1.module+el8.10.0+25107+6b50279c | RHSA-2026:86203 | Oct 21, 2026 |
| golang · RHEL 9 | 0:1.26.10-1.el9_8 | RHSA-2026:86196 | Oct 21, 2026 |
| golang · almalinux 10 | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 | Nov 7, 2026 |
| golang · almalinux 8 | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 | Nov 7, 2026 |
| golang · almalinux 9 | 1.26.10-1.el9_8 | ALSA-2026:86196 | Nov 7, 2026 |
| golang · amzn 2023 | 1.26.9-1.amzn2023.0.1 | ALAS2023-2026-3225 | Nov 7, 2026 |
| golang · ol 10 | 0:1.26.10-1.0.1.el10_2 | ELSA-2026-86093 | Nov 7, 2026 |
| golang · ol 8 | 0:1.26.10-1.0.1.module+el8.10.0+91075+4cd454b9 | ELSA-2026-86203 | Nov 7, 2026 |
| golang · ol 9 | 0:1.26.10-1.0.1.el9_8 | ELSA-2026-86196 | Nov 7, 2026 |
| golang · rocky 10 | 0:1.26.10-1.el10_2 | RLSA-2026:86093 | Nov 7, 2026 |
| golang · rocky 9 | 0:1.26.10-1.el9_8 | RLSA-2026:86196 | Nov 7, 2026 |
| golang-1.26 · Debian 14 | 1.26.9-1 | DEBIAN-CVE-2026-97031 | Oct 12, 2026 |
| golang-1.27 · Debian 14 | 1.27.2-1 | DEBIAN-CVE-2026-97031 | Oct 12, 2026 |
| golang-bin · RHEL 8 | 0:1.26.10-1.module+el8.10.0+25107+6b50279c | RHSA-2026:86203 | Oct 21, 2026 |
| golang-bin · RHEL 9 | 0:1.26.10-1.el9_8 | RHSA-2026:86196 | Oct 21, 2026 |
| golang-bin · almalinux 10 | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 | Nov 7, 2026 |
| golang-bin · almalinux 8 | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 | Nov 7, 2026 |
| golang-bin · almalinux 9 | 1.26.10-1.el9_8 | ALSA-2026:86196 | Nov 7, 2026 |
| golang-bin · amzn 2023 | 1.26.9-1.amzn2023.0.1 | ALAS2023-2026-3225 | Nov 7, 2026 |
| golang-bin · ol 10 | 0:1.26.10-1.0.1.el10_2 | ELSA-2026-86093 | Nov 7, 2026 |
| golang-bin · ol 8 | 0:1.26.10-1.0.1.module+el8.10.0+91075+4cd454b9 | ELSA-2026-86203 | Nov 7, 2026 |
| golang-bin · ol 9 | 0:1.26.10-1.0.1.el9_8 | ELSA-2026-86196 | Nov 7, 2026 |
| golang-docs · RHEL 8 | 0:1.26.10-1.module+el8.10.0+25107+6b50279c | RHSA-2026:86203 | Oct 21, 2026 |
| golang-docs · RHEL 9 | 0:1.26.10-1.el9_8 | RHSA-2026:86196 | Oct 21, 2026 |
| golang-docs · almalinux 10 | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 | Nov 7, 2026 |
| golang-docs · almalinux 8 | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 | Nov 7, 2026 |
| golang-docs · almalinux 9 | 1.26.10-1.el9_8 | ALSA-2026:86196 | Nov 7, 2026 |
| golang-docs · amzn 2023 | 1.26.9-1.amzn2023.0.1 | ALAS2023-2026-3225 | Nov 7, 2026 |
| golang-docs · ol 10 | 0:1.26.10-1.0.1.el10_2 | ELSA-2026-86093 | Nov 7, 2026 |
| golang-docs · ol 8 | 0:1.26.10-1.0.1.module+el8.10.0+91075+4cd454b9 | ELSA-2026-86203 | Nov 7, 2026 |
| golang-docs · ol 9 | 0:1.26.10-1.0.1.el9_8 | ELSA-2026-86196 | Nov 7, 2026 |
| golang-github-openprinting-ipp-usb · RHEL 10 | 0.9.27-7.el10_2.4 | RHSA-2026:88280 | Oct 24, 2026 |
| golang-github-openprinting-ipp-usb · rocky 10 | 0:0.9.27-7.el10_2.4 | RLSA-2026:88280 | Nov 7, 2026 |
| golang-misc · RHEL 8 | 0:1.26.10-1.module+el8.10.0+25107+6b50279c | RHSA-2026:86203 | Oct 21, 2026 |
| golang-misc · RHEL 9 | 0:1.26.10-1.el9_8 | RHSA-2026:86196 | Oct 21, 2026 |
| golang-misc · almalinux 10 | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 | Nov 7, 2026 |
| golang-misc · almalinux 8 | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 | Nov 7, 2026 |
| golang-misc · almalinux 9 | 1.26.10-1.el9_8 | ALSA-2026:86196 | Nov 7, 2026 |
| golang-misc · amzn 2023 | 1.26.9-1.amzn2023.0.1 | ALAS2023-2026-3225 | Nov 7, 2026 |
| golang-misc · ol 10 | 0:1.26.10-1.0.1.el10_2 | ELSA-2026-86093 | Nov 7, 2026 |
| golang-misc · ol 8 | 0:1.26.10-1.0.1.module+el8.10.0+91075+4cd454b9 | ELSA-2026-86203 | Nov 7, 2026 |
| golang-misc · ol 9 | 0:1.26.10-1.0.1.el9_8 | ELSA-2026-86196 | Nov 7, 2026 |
| golang-race · RHEL 8 | 0:1.26.10-1.module+el8.10.0+25107+6b50279c | RHSA-2026:86203 | Oct 21, 2026 |
| golang-race · RHEL 9 | 0:1.26.10-1.el9_8 | RHSA-2026:86196 | Oct 21, 2026 |
| golang-race · almalinux 10 | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 | Nov 7, 2026 |
| golang-race · almalinux 8 | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 | Nov 7, 2026 |
| golang-race · almalinux 9 | 1.26.10-1.el9_8 | ALSA-2026:86196 | Nov 7, 2026 |
| golang-race · ol 10 | 0:1.26.10-1.0.1.el10_2 | ELSA-2026-86093 | Nov 7, 2026 |
| golang-race · ol 8 | 0:1.26.10-1.0.1.module+el8.10.0+91075+4cd454b9 | ELSA-2026-86203 | Nov 7, 2026 |
| golang-race · ol 9 | 0:1.26.10-1.0.1.el9_8 | ELSA-2026-86196 | Nov 7, 2026 |
| golang-shared · amzn 2023 | 1.26.9-1.amzn2023.0.1 | ALAS2023-2026-3225 | Nov 7, 2026 |
| golang-src · RHEL 8 | 0:1.26.10-1.module+el8.10.0+25107+6b50279c | RHSA-2026:86203 | Oct 21, 2026 |
| golang-src · RHEL 9 | 0:1.26.10-1.el9_8 | RHSA-2026:86196 | Oct 21, 2026 |
| golang-src · almalinux 10 | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 | Nov 7, 2026 |
| golang-src · almalinux 8 | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 | Nov 7, 2026 |
| golang-src · almalinux 9 | 1.26.10-1.el9_8 | ALSA-2026:86196 | Nov 7, 2026 |
| golang-src · amzn 2023 | 1.26.9-1.amzn2023.0.1 | ALAS2023-2026-3225 | Nov 7, 2026 |
| golang-src · ol 10 | 0:1.26.10-1.0.1.el10_2 | ELSA-2026-86093 | Nov 7, 2026 |
| golang-src · ol 8 | 0:1.26.10-1.0.1.module+el8.10.0+91075+4cd454b9 | ELSA-2026-86203 | Nov 7, 2026 |
| golang-src · ol 9 | 0:1.26.10-1.0.1.el9_8 | ELSA-2026-86196 | Nov 7, 2026 |
| golang-tests · RHEL 8 | 0:1.26.10-1.module+el8.10.0+25107+6b50279c | RHSA-2026:86203 | Oct 21, 2026 |
| golang-tests · RHEL 9 | 0:1.26.10-1.el9_8 | RHSA-2026:86196 | Oct 21, 2026 |
| golang-tests · almalinux 10 | 1.26.10-1.el10_2.alma.1 | ALSA-2026:86093 | Nov 7, 2026 |
| golang-tests · almalinux 8 | 1.26.10-1.module_el8.10.0+4307+6e4cbc60 | ALSA-2026:86203 | Nov 7, 2026 |
| golang-tests · almalinux 9 | 1.26.10-1.el9_8 | ALSA-2026:86196 | Nov 7, 2026 |
| golang-tests · amzn 2023 | 1.26.9-1.amzn2023.0.1 | ALAS2023-2026-3225 | Nov 7, 2026 |
| golang-tests · ol 10 | 0:1.26.10-1.0.1.el10_2 | ELSA-2026-86093 | Nov 7, 2026 |
| golang-tests · ol 8 | 0:1.26.10-1.0.1.module+el8.10.0+91075+4cd454b9 | ELSA-2026-86203 | Nov 7, 2026 |
| golang-tests · ol 9 | 0:1.26.10-1.0.1.el9_8 | ELSA-2026-86196 | Nov 7, 2026 |
| grafana · RHEL 10 | 10.2.6-27.el10_0 | RHSA-2026:88397 | Oct 24, 2026 |
| grafana · RHEL 8 | 0:9.2.10-36.el8_10 | RHSA-2026:88188 | Oct 24, 2026 |
| grafana · RHEL 9 | 0:10.2.6-23.el9_8.7 | RHSA-2026:89744 | Oct 27, 2026 |
| grafana · almalinux 8 | 9.2.10-36.el8_10 | ALSA-2026:88188 | Nov 7, 2026 |
| grafana · almalinux 9 | 10.2.6-23.el9_8.7 | ALSA-2026:89744 | Nov 7, 2026 |
| grafana · ol 10 | 0:10.2.6-28.el10_2.9 | ELSA-2026-89751 | Nov 7, 2026 |
| grafana · ol 8 | 0:9.2.10-36.0.1.el8_10 | ELSA-2026-88188 | Nov 7, 2026 |
| grafana · ol 9 | 0:10.2.6-23.el9_8.7 | ELSA-2026-89744 | Nov 7, 2026 |
| grafana · rocky 8 | 0:9.2.10-36.el8_10 | RLSA-2026:88188 | Nov 7, 2026 |
| grafana · rocky 9 | 0:10.2.6-23.el9_8.7 | RLSA-2026:89744 | Nov 7, 2026 |
| grafana-pcp · RHEL 10 | 5.3.0-1.el10_0.2 | RHSA-2026:88317 | Oct 24, 2026 |
| grafana-pcp · RHEL 8 | 0:5.1.1-19.el8_10 | RHSA-2026:88189 | Oct 24, 2026 |
| grafana-pcp · RHEL 9 | 0:5.1.1-17.el9_8.2 | RHSA-2026:88354 | Oct 24, 2026 |
| grafana-pcp · almalinux 10 | 5.3.0-8.el10_2.2 | ALSA-2026:88316 | Nov 7, 2026 |
| grafana-pcp · almalinux 8 | 5.1.1-19.el8_10 | ALSA-2026:88189 | Nov 7, 2026 |
| grafana-pcp · almalinux 9 | 5.1.1-17.el9_8.2 | ALSA-2026:88354 | Nov 7, 2026 |
| grafana-pcp · ol 10 | 0:5.3.0-8.el10_2.2 | ELSA-2026-88316 | Nov 7, 2026 |
| grafana-pcp · ol 8 | 0:5.1.1-19.el8_10 | ELSA-2026-88189 | Nov 7, 2026 |
| grafana-pcp · ol 9 | 0:5.1.1-17.el9_8.2 | ELSA-2026-88354 | Nov 7, 2026 |
| grafana-pcp · rocky 10 | 0:5.3.0-8.el10_2.2 | RLSA-2026:88316 | Nov 7, 2026 |
| grafana-pcp · rocky 8 | 0:5.1.1-19.el8_10 | RLSA-2026:88189 | Nov 7, 2026 |
| grafana-pcp · rocky 9 | 0:5.1.1-17.el9_8.2 | RLSA-2026:88354 | Nov 7, 2026 |
| grafana-selinux · RHEL 8 | 0:9.2.10-36.el8_10 | RHSA-2026:88188 | Oct 24, 2026 |
| grafana-selinux · RHEL 9 | 0:10.2.6-23.el9_8.7 | RHSA-2026:89744 | Oct 27, 2026 |
| grafana-selinux · almalinux 8 | 9.2.10-36.el8_10 | ALSA-2026:88188 | Nov 7, 2026 |
| grafana-selinux · almalinux 9 | 10.2.6-23.el9_8.7 | ALSA-2026:89744 | Nov 7, 2026 |
| grafana-selinux · ol 10 | 0:10.2.6-28.el10_2.9 | ELSA-2026-89751 | Nov 7, 2026 |
| grafana-selinux · ol 8 | 0:9.2.10-36.0.1.el8_10 | ELSA-2026-88188 | Nov 7, 2026 |
| grafana-selinux · ol 9 | 0:10.2.6-23.el9_8.7 | ELSA-2026-89744 | Nov 7, 2026 |
| ipp-usb · almalinux 10 | 0.9.27-7.el10_2.4 | ALSA-2026:88280 | Nov 7, 2026 |
| ipp-usb · ol 10 | 0:0.9.27-7.el10_2.4 | ELSA-2026-88280 | Nov 7, 2026 |
| opentelemetry-collector · RHEL 10 | 0.158.0-2.el10_0 | RHSA-2026:95016 | Nov 3, 2026 |
| opentelemetry-collector · RHEL 9 | 0:0.158.0-2.el9_8 | RHSA-2026:93617 | Nov 3, 2026 |
| opentelemetry-collector · almalinux 10 | 0.158.0-2.el10_2 | ALSA-2026:93596 | Nov 7, 2026 |
| opentelemetry-collector · almalinux 9 | 0.158.0-2.el9_8 | ALSA-2026:93617 | Nov 7, 2026 |
| opentelemetry-collector · rocky 10 | 0:0.158.0-2.el10_2 | RLSA-2026:93596 | Nov 7, 2026 |
| opentelemetry-collector · rocky 9 | 0:0.158.0-2.el9_8 | RLSA-2026:93617 | Nov 7, 2026 |
| osbuild-composer · RHEL 10 | 134.1-13.el10_0 | RHSA-2026:91646 | Oct 29, 2026 |
| receptor · RHEL 10 | 1.6.9-3.el10ap | RHSA-2026:92622 | Oct 30, 2026 |
| rhc · RHEL 10 | 0.3.2-6.el10_0.2 | RHSA-2026:89892 | Oct 27, 2026 |
| rhc · RHEL 8 | 1:0.2.5-13.el8_10 | RHSA-2026:89741 | Oct 27, 2026 |
| rhc · RHEL 9 | 1:0.2.7-16.el9_8 | RHSA-2026:89740 | Oct 27, 2026 |
| rhc-devel · RHEL 9 | 1:0.2.7-16.el9_8 | RHSA-2026:89740 | Oct 27, 2026 |
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