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9.8
containerd can be crashed by HTTP/2 reset flood
published 1 month ago
Summary
The containerd software may stop working if an attacker sends many HTTP/2 reset messages. This can cause your services that rely on containerd to become unavailable. Apply the latest updates or patches for containerd to protect against this issue.
What to do
- Update cleanstart containerd to version 1.2.9-r0.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| CleanStart | cleanstart | containerd |
< 1.2.9-r0 Fix: upgrade to 1.2.9-r0
|
Original advisory text
Some HTTP/2 implementations are vulnerable to a reset flood, potentially leading to a denial of service
Security vulnerability affects the containerd package. Some HTTP/2 implementations are vulnerable to a reset flood, potentially leading to a denial of service.
Internet-facing
3 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically (estimated)
- Gives an attacker full control (estimated)
Timeline
Published30 Sep 2026
Updated1 Oct 2026
First seen1 Oct 2026
Sources
CLEANSTART-2025-AF65508 · OSV
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