CVE-2026-32934
- Source
- https://cve.org/CVERecord?id=CVE-2026-32934
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-32934.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-32934
- Aliases
- Downstream
- Related
- Published
- 2026-05-05T19:06:17.080Z
- Modified
- 2026-06-18T03:54:57.150242923Z
- Severity
-
- 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- CoreDNS DNS-over-QUIC unbounded goroutine growth leads to denial of service
- Details
-
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.
- Database specific
{ "cwe_ids": [ "CWE-770" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32934.json", "cna_assigner": "GitHub_M" }- References
Affected packages
Git / github.com/coredns/coredns
Affected ranges
- Type
- GIT
- Repo
- https://github.com/coredns/coredns
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
{ "source": [ "AFFECTED_FIELD", "CPE_RANGE", "REFERENCES" ], "extracted_events": [ { "introduced": "0" }, { "fixed": "1.14.3" }, { "introduced": "0" }, { "fixed": "1.14.3" } ], "cpe": "cpe:2.3:a:coredns.io:coredns:*:*:*:*:*:*:*:*" }