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SUSE 16.0 Bind Important Security Update Denial of Service Fix 2026-21204-1

suse
Calendar Grey April 21, 2026
Dist Suse Esm H88
Update for SUSE bind addresses multiple important issues including denial of service and memory leaks for enhanced security.
An update that solves four vulnerabilities and has one fix can now be installed.

Summary

## This update for bind fixes the following issues: * Update to release 9.20.21 * CVE-2026-1519: maliciously crafted DNSSEC-validated zone can lead to denial of service (bsc#1260805). * CVE-2026-3104: memory leak in code preparing DNSSEC proofs of non-existence allows for DoS (bsc#1260567). * CVE-2026-3119: authenticated queries containing a TKEY record may cause `named` to terminate unexpectedly (bsc#1260568). * CVE-2026-3591: stack use-after-return flaw in SIG(0) handling code allows for ACL bypass (bsc#1260569). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * SUSE Linux Enterprise Server 16.0 zypper in -t patch SUSE-SLES-16.0-573=1

Topics%20covered

Topics Covered

security advisory denial of service SuSE bind important memory leak

References

* bsc#1259202

* bsc#1260567

* bsc#1260568

* bsc#1260569

* bsc#1260805

Cross-

* CVE-2026-1519

* CVE-2026-3104

* CVE-2026-3119

* CVE-2026-3591

CVSS scores:

* CVE-2026-1519 ( SUSE ): 8.7

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

* CVE-2026-1519 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-1519 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-3104 ( SUSE ): 8.7

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

* CVE-2026-3104 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-3104 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-3119 ( SUSE ): 7.1

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:21204-1
Release Date: 2026-04-16T10:12:49Z
Rating: important

Topics%20covered

Topics Covered

security advisory denial of service SuSE bind important memory leak

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