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openSUSE Leap 16.0 glibc Important Heap Overflow Denial of Service 20764-1

opensuse
Calendar Grey May 19, 2026
Scroller Opensuse
Critical security update for openSUSE Leap 16.0 fixing glibc vulnerabilities including heap overflow and data leak issues.
An update that solves 3 vulnerabilities and has 3 bug fixes can now be installed.

Description

This update for glibc fixes the following issues

- CVE-2026-4046: assertion failure when converting inputs may be used to remotely crash an application (bsc#1261206).

- CVE-2026-5450: stdio-common: scanf %mc pattern will cause heap overflow when width > 1024 (bsc#1262465).

- CVE-2026-5928: libio: ungetwc could be used to leak data on special conditions (bsc#1262464).

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-16.0-761=1

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow important glibc OpenSUSE

Patch

Package List

- openSUSE Leap 16.0:

cross-aarch64-glibc-devel-2.40-160000.5.1

cross-ppc64le-glibc-devel-2.40-160000.5.1

cross-riscv64-glibc-devel-2.40-160000.5.1

cross-s390x-glibc-devel-2.40-160000.5.1

glibc-2.40-160000.5.1

glibc-devel-2.40-160000.5.1

glibc-devel-static-2.40-160000.5.1

glibc-extra-2.40-160000.5.1

glibc-gconv-modules-extra-2.40-160000.5.1

glibc-html-2.40-160000.5.1

glibc-i18ndata-2.40-160000.5.1

glibc-info-2.40-160000.5.1

glibc-lang-2.40-160000.5.1

glibc-locale-2.40-160000.5.1

glibc-locale-base-2.40-160000.5.1

glibc-profile-2.40-160000.5.1

glibc-utils-2.40-160000.5.1

References

* bsc#1261206

* bsc#1262464

* bsc#1262465

References:

* https://www.suse.com/security/cve/CVE-2026-4046.html

* https://www.suse.com/security/cve/CVE-2026-5450.html

* https://www.suse.com/security/cve/CVE-2026-5928.html

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: openSUSE-SU-2026:20764-1
Rating: important
Affected Products: openSUSE Leap 16.0 -------------------------------------------------------------

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow important glibc OpenSUSE

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