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SUSE 16.0 zlib Moderate Buffer Overflow and Infinite Loop Fix 2026-21151-1

suse
Calendar Grey April 21, 2026
Dist Suse Esm H88
Update for SUSE fixes moderate vulnerabilities in zlib, addressing critical stability and security issues to enhance protection.
An update that solves two vulnerabilities can now be installed.

Summary

## This update for zlib fixes the following issues: * CVE-2026-27171: Fixed an infinite loop via the crc32_combine64 and crc32_combine_gen64 functions due to missing checks for negative lengths. (bsc#1258392) * CVE-2023-45853: Fixed an integer overflow and resultant heap-based buffer overflow in zipOpenNewFileInZip4_6. (bsc#1216378) ## 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-16.0-502=1 * SUSE Linux Enterprise Server for SAP applications 16.0 zypper in -t patch SUSE-SLES-16.0-502=1 ## Package List: * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)

Topics%20covered

Topics Covered

security advisory moderate buffer overflow SuSE infinite loop zip

References

* bsc#1216378

* bsc#1258392

Cross-

* CVE-2023-45853

* CVE-2026-27171

CVSS scores:

* CVE-2023-45853 ( SUSE ): 5.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

* CVE-2023-45853 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

* CVE-2023-45853 ( NVD ): 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

* CVE-2026-27171 ( SUSE ): 6.9

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

* CVE-2026-27171 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

* CVE-2026-27171 ( NVD ): 2.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

* CVE-2026-27171 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products:

* SUSE Linux Enterprise Server 16.0

* SUSE Linux Enterprise Server for SAP applications 16.0

Announcement ID: SUSE-SU-2026:21151-1
Release Date: 2026-04-09T11:18:30Z
Rating: moderate

Topics%20covered

Topics Covered

security advisory moderate buffer overflow SuSE infinite loop zip

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