Description
CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the DNS-over-QUIC (DoQ) server can be driven into unbounded goroutine and memory growth by a remote client that opens many QUIC streams and sends only 1 byte per stream. When the worker pool is full, CoreDNS still spawns a goroutine per accepted stream to wait for a worker token. Additionally, active workers block indefinitely in io.ReadFull() with no per-stream read deadline, allowing an attacker to pin all workers by sending a single byte so the read blocks waiting for the second byte of the DoQ length prefix. This enables an unauthenticated remote attacker to cause memory exhaustion and OOM-kill. This issue has been fixed in version 1.14.3. No known workarounds exist.
INFO
Published Date :
2026-05-05T19:06:17.080Z
Last Modified :
2026-05-06T15:14:54.790Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2026-32934 vulnerability.
| Vendors | Products |
|---|---|
| Coredns.io |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-32934.
