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openSUSE Leap 16.0 Advisory ID 2026-21228-1 Glibc Moderate Buffer Overflow

opensuse
Calendar Grey July 4, 2026
Dist Opensuse Esm H88
An important update for openSUSE Leap that addresses moderate risks in glibc affecting application stability and memory.
An update that solves 2 vulnerabilities and has 2 bug fixes can now be installed.

Description

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 openSUSE security 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 16.0

zypper in -t patch openSUSE-Leap-16.0-1157=1

Topics%20covered

Topics Covered

security advisory moderate buffer overflow glibc application crash OpenSUSE

Patch

Package List

- openSUSE Leap 16.0:

cross-aarch64-glibc-devel-2.40-160000.6.1

cross-ppc64le-glibc-devel-2.40-160000.6.1

cross-riscv64-glibc-devel-2.40-160000.6.1

cross-s390x-glibc-devel-2.40-160000.6.1

glibc-2.40-160000.6.1

glibc-devel-2.40-160000.6.1

glibc-devel-static-2.40-160000.6.1

glibc-extra-2.40-160000.6.1

glibc-gconv-modules-extra-2.40-160000.6.1

glibc-html-2.40-160000.6.1

glibc-i18ndata-2.40-160000.6.1

glibc-info-2.40-160000.6.1

glibc-lang-2.40-160000.6.1

glibc-locale-2.40-160000.6.1

glibc-locale-base-2.40-160000.6.1

glibc-profile-2.40-160000.6.1

glibc-utils-2.40-160000.6.1

References

* bsc#1263656

* bsc#1263658

References:

* https://www.suse.com/security/cve/CVE-2026-5435.html

* https://www.suse.com/security/cve/CVE-2026-6238.html

Severity
moderate
Lowest
Low
Medium
High
Critical

Announcement ID: openSUSE-SU-2026:21228-1
Rating: moderate
Affected Products: openSUSE Leap 16.0 -------------------------------------------------------------

Topics%20covered

Topics Covered

security advisory moderate buffer overflow glibc application crash OpenSUSE

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