CVE-2026-32934

Name
CVE-2026-32934
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
security-advisories@github.com https://github.com/coredns/coredns/releases/tag/v1.14.3
security-advisories@github.com https://github.com/coredns/coredns/security/advisories/GHSA-2wpx-qpw2-g5h5

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:coredns.io:coredns:*:*:*:*:*:*:*:* coredns >= None < 1.14.3

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
coredns edge-community 1.13.2-r5 Achill Gilgenast <achill@achill.org> possibly vulnerable
coredns edge-community 1.13.2-r4 Achill Gilgenast <achill@achill.org> possibly vulnerable
coredns edge-community 1.13.2-r3 Achill Gilgenast <achill@achill.org> possibly vulnerable
coredns edge-community 1.13.2-r2 Achill Gilgenast <achill@achill.org> possibly vulnerable
coredns edge-community 1.13.2-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable
coredns edge-community 1.13.2-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
coredns edge-community 1.12.3-r5 Achill Gilgenast <achill@achill.org> possibly vulnerable
coredns edge-community 1.12.3-r4 Achill Gilgenast <achill@achill.org> possibly vulnerable
coredns edge-community 1.12.3-r3 Achill Gilgenast <achill@achill.org> possibly vulnerable
coredns edge-community 1.12.3-r2 Achill Gilgenast <achill@achill.org> possibly vulnerable
coredns edge-community 1.12.3-r1 fossdd <fossdd@pwned.life> possibly vulnerable
coredns edge-community 1.12.3-r0 fossdd <fossdd@pwned.life> possibly vulnerable
coredns edge-community 1.12.2-r1 fossdd <fossdd@pwned.life> possibly vulnerable
coredns edge-community 1.12.2-r0 fossdd <fossdd@pwned.life> possibly vulnerable
coredns edge-community 1.12.1-r2 fossdd <fossdd@pwned.life> possibly vulnerable
coredns edge-community 1.12.1-r1 fossdd <fossdd@pwned.life> possibly vulnerable
coredns edge-community 1.12.1-r0 fossdd <fossdd@pwned.life> possibly vulnerable
coredns edge-community 1.12.0-r5 fossdd <fossdd@pwned.life> possibly vulnerable
coredns edge-community 1.12.0-r4 fossdd <fossdd@pwned.life> possibly vulnerable
coredns edge-community 1.12.0-r3 fossdd <fossdd@pwned.life> possibly vulnerable
coredns edge-community 1.12.0-r1 Mark Pashmfouroush <mark@markpash.me> possibly vulnerable
coredns edge-community 1.12.0-r0 Mark Pashmfouroush <mark@markpash.me> possibly vulnerable
coredns edge-community 1.11.3-r0 Mark Pashmfouroush <mark@markpash.me> possibly vulnerable
coredns edge-community 1.9.3-r0 Mark Pashmfouroush <mark@markpash.me> possibly vulnerable
coredns 3.23-community 1.12.3-r10 Achill Gilgenast <achill@achill.org> possibly vulnerable
coredns 3.23-community 1.12.3-r9 Achill Gilgenast <achill@achill.org> possibly vulnerable
coredns 3.23-community 1.12.3-r8 Achill Gilgenast <achill@achill.org> possibly vulnerable
coredns 3.23-community 1.12.3-r7 Achill Gilgenast <achill@achill.org> possibly vulnerable
coredns 3.23-community 1.12.3-r6 Achill Gilgenast <achill@achill.org> possibly vulnerable
coredns 3.23-community 1.12.3-r5 Achill Gilgenast <achill@achill.org> possibly vulnerable