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SUSE Linux glibc Moderate Buffer Overflow Crisis 2026-3029-1

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Calendar Grey July 15, 2026
Scroller Suse
The SUSE security advisory 2026-3029-1 provides an update for glibc to fix moderate issues, including buffer overflow risks.
SUSE has announced a glibc update addressing two moderate vulnerabilities that can cause crashes or memory disclosure, applicable to several SUSE products

Summary

## This update for glibc fixes the following issues * CVE-2026-5435: unchecked buffer writing in TSIG handling can lead to an out- of-bounds write (bsc#1263656). * CVE-2026-6238: insufficient RDATA length validation can lead to application crashes or uninitialized memory disclosure (bsc#1263658). ## 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: * openSUSE Leap 15.3 zypper in -t patch SUSE-2026-3029=1 * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-3029=1 * SUSE Linux Enterprise Micro for Rancher 5.4 zypper in -t patch SUSE-SLE-Micro-5.4-2026-3029=1

Topics%20covered

Topics Covered

security advisory moderate buffer overflow SuSE glibc data disclosure

References

* bsc#1263656

* bsc#1263658

Cross-

* CVE-2026-5435

* CVE-2026-6238

CVSS scores:

* CVE-2026-5435 ( SUSE ): 4.8

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

* CVE-2026-5435 ( SUSE ): 5.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

* CVE-2026-5435 ( NVD ): 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

* CVE-2026-6238 ( SUSE ): 4.8

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

* CVE-2026-6238 ( SUSE ): 5.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

* CVE-2026-6238 ( NVD ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Affected Products:

* openSUSE Leap 15.3

* SUSE Linux Enterprise High Performance Computing 15 SP4

* SUSE Linux Enterprise High Performance Computing 15 SP5

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4

Severity
moderate
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:3029-1
Release Date: 2026-07-15T09:52:53Z
Rating: moderate

Topics%20covered

Topics Covered

security advisory moderate buffer overflow SuSE glibc data disclosure

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