CVE-2026-78663: Double flow control refund on HTTP/2 server streams in net/http
Double flow control refund on HTTP/2 server streams in net/http
- Published by source
- 2026-10-13
- First seen by Reality Radar
- 2026-10-22
- Last verified
- 2026-10-22
Affected
- Manufacturer
- Microsoft
- Products
- azl3 cert-manager 1.12.15-14 on Azure Linux 3.0 azl3 cloud-provider-kubevirt 0.5.1-9 on Azure Linux 3.0 azl3 containerized-data-importer 1.62.0-8 on Azure Linux 3.0 azl3 etcd 3.5.33-1 on Azure Linux 3.0 azl3 influxdb 2.7.5-21 on Azure Linux 3.0 azl3 kata-containers 4.1.0.kata0-1 on Azure Linux 3.0 azl3 kata-containers-cc 3.15.0.aks0-21 on Azure Linux 3.0 azl3 keda 2.14.1-19 on Azure Linux 3.0 azl3 kube-vip-cloud-provider 0.0.10-10 on Azure Linux 3.0 azl3 kubernetes 1.30.10-30 on Azure Linux 3.0 azl3 kubevirt 1.8.4-2 on Azure Linux 3.0 azl3 moby-containerd-cc 1.7.7-17 on Azure Linux 3.0 azl3 moby-engine 25.0.3-20 on Azure Linux 3.0 azl3 opa 0.63.0-5 on Azure Linux 3.0 azl3 prometheus-adapter 0.12.0-10 on Azure Linux 3.0 azl3 httpd 2.4.68-1 on Azure Linux 3.0 azl3 golang 1.26.7-1 on Azure Linux 3.0 azl3 golang 1.27.1-1 on Azure Linux 3.0 azl3 gcc 13.2.0-7 on Azure Linux 3.0 azl3 python-tensorboard 2.16.2-6 on Azure Linux 3.0
- CPE
- cpe:2.3:a:microsoft:azl3_cert-manager_1.12.15-14:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:azl3_cloud-provider-kubevirt_0.5.1-9:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:azl3_containerized-data-importer_1.62.0-8:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:azl3_etcd_3.5.33-1:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:azl3_influxdb_2.7.5-21:*:*:*:*:*:*:*:*
Whether your exact unit is affected depends on the model, serial number and region in the official notice.
What the official notice says
Risk: Critical
Remedy / actions:
- Install the latest Microsoft security update
Is this affecting you?
Add what you own or use and Reality Radar will tell you when official changes match it — with evidence and next steps.
Sources
- Microsoft Security Update Guide (MSRC) Tier A · official published 2026-10-13
Evidence ledger
Every piece of evidence we store is appended to a public hash chain, so later edits are detectable. Anyone can re-verify it.
| Entry | Kind | Observed | Evidence hash | Entry hash |
|---|---|---|---|---|
| #197 | new | 2026-10-22 | fb271cc2012b…424920 | c3d90ce5fb09…d2ab5a |
Chain head: #1076 8ad5adc30b9b…88ce20