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SUSE libpng15 Important Update Fixing Use-After-Free Issues 2026-1500-1

suse
Calendar Grey April 21, 2026
Dist Suse Esm H88
Update for SUSE libpng15 addresses two crucial issues: use-after-free flaws leading to data corruption and execution risks.
An update that solves two vulnerabilities can now be installed.

Summary

## This update for libpng15 fixes the following issues: * CVE-2026-34757: use-after-free in `png_set_PLTE`, `png_set_tRNS` and `png_set_hIST` can lead to information disclosure and data corruption (bsc#1261957). * CVE-2026-33416: use-after-free via pointer aliasing in `png_set_tRNS` and `png_set_PLTE` can lead to arbitrary code execution (bsc#1260754). ## 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 12 SP5 LTSS zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-1500=1 * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-1500=1

Topics%20covered

Topics Covered

security advisory SuSE arbitrary code execution important use-after-free libpng15

References

* bsc#1260754

* bsc#1261957

Cross-

* CVE-2026-33416

* CVE-2026-34757

CVSS scores:

* CVE-2026-33416 ( SUSE ): 9.2

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

* CVE-2026-33416 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-33416 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

* CVE-2026-34757 ( SUSE ): 5.1

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

* CVE-2026-34757 ( SUSE ): 5.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

* CVE-2026-34757 ( NVD ): 5.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected Products:

* SUSE Linux Enterprise High Performance Computing 12 SP5

* SUSE Linux Enterprise Server 12 SP5

* SUSE Linux Enterprise Server 12 SP5 LTSS

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:1500-1
Release Date: 2026-04-20T16:16:44Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE arbitrary code execution important use-after-free libpng15

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