CVE-2026-3104

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.

High

CVSS

7.5

Important

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0073

54th percentile

memory leak in code preparing DNSSEC proofs of non-existence allows for DoS (bsc#1260567).

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

Details

Published
March 24, 2026
Weakness
Missing Release of Resource after Effective Lifetime
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-3104

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