CVE-2026-78662 Affecting k3s-1.34 package, versions <1.34.11.1-r3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published6 Sept 2026
- disclosed2 Sept 2026
Introduced: 2 Sep 2026
NewCVE-2026-78662 (opens in a new tab)How to fix?
Upgrade Wolfi k3s-1.34 to version 1.34.11.1-r3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream k3s-1.34 package and not the k3s-1.34 package as distributed by Wolfi.
See How to fix? for Wolfi relevant fixed versions and status.
Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time, handlePacket drops every packet other than the open confirmation/failure, without blocking and without tearing down the connection.