PT-2026-37094 · Coredns+1 · Coredns+1
CVSS v4.0
8.7
High
| Vector | AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
Name of the Vulnerable Software and Affected Versions
CoreDNS versions prior to 1.14.3
Description
The DNS-over-QUIC (DoQ) server can be forced into unbounded goroutine and memory growth by a remote unauthenticated client. This occurs when a client opens numerous QUIC streams and sends only one byte per stream. Even when the worker pool is full, the system continues to spawn a goroutine for every accepted stream to wait for a worker token. Furthermore, active workers can block indefinitely in the
io.ReadFull() function because there is no per-stream read deadline, allowing an attacker to pin all workers by sending a single byte while the system waits for the second byte of the DoQ length prefix. This leads to memory exhaustion and an OOM-kill (Out-of-Memory kill), resulting in a denial of service.Recommendations
Update to version 1.14.3.
Exploit
Fix
DoS
Allocation of Resources Without Limits
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Coredns
Red Os