Memory leak in code preparing DNSSEC proofs of non-existence
CVE-2026-3104 is fixed in 6 products on 1 platform, first by DEBIAN-CVE-2026-3104, released March 25, 2026. It is not reported as exploited. Patch Radar priority: High.
A specially crafted domain can be used to cause a memory leak in a BIND resolver simply by querying this domain. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bind · opensuse-leap 16.0 | 9.20.21-160000.1.1 | OPENSUSE-SU-2026:20550-1 | Apr 16, 2026 |
| bind · sles 15.7 | 9.20.21-150700.3.18.1 | SUSE-SU-2026:1351-1 | Apr 15, 2026 |
| bind · sles 16.0 | 9.20.21-160000.1.1 | SUSE-SU-2026:21204-1 | Apr 16, 2026 |
| bind9 · Debian 13.5 (trixie) | 1:9.20.21-1~deb13u1 | DEBIAN-CVE-2026-3104 | Mar 25, 2026 |
| bind9 · Debian 14 | 1:9.20.21-1 | DEBIAN-CVE-2026-3104 | Mar 25, 2026 |
| bind9 · Ubuntu 25.10 (questing) | 1:9.20.11-1ubuntu2.2 | bind9 1:9.20.11-1ubuntu2.2 | Apr 15, 2026 |
| bind9-dnsutils · Ubuntu 25.10 (questing) | 1:9.20.11-1ubuntu2.2 | bind9-dnsutils 1:9.20.11-1ubuntu2.2 | Apr 15, 2026 |
| bind9-host · Ubuntu 25.10 (questing) | 1:9.20.11-1ubuntu2.2 | bind9-host 1:9.20.11-1ubuntu2.2 | Apr 15, 2026 |
| bind9-libs · Ubuntu 25.10 (questing) | 1:9.20.11-1ubuntu2.2 | bind9-libs 1:9.20.11-1ubuntu2.2 | Apr 15, 2026 |
| bind9-utils · Ubuntu 25.10 (questing) | 1:9.20.11-1ubuntu2.2 | bind9-utils 1:9.20.11-1ubuntu2.2 | Apr 15, 2026 |
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