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SUSE glibc Critical Update Addresses DoS Vulnerability 2026-2440-1

suse
Calendar Grey June 18, 2026
Dist Suse Esm H88
SUSE's important update for glibc addresses three vulnerabilities in the 12 SP5 version.
An update that solves three vulnerabilities can now be installed.

Summary

## This update for glibc fixes the following issues: * CVE-2026-5928: libio: Fix ungetwc operating on byte stream (bsc#1262464, BZ #33998) * CVE-2026-5450: stdio-common: Fix buffer overflow in scanf %mc (bsc#1262465, BZ #34008) * CVE-2026-4046: Use pending character state in IBM1390, IBM1399 character sets (bsc#1261206, BZ #33980) ## 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-2026-2440=1 * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-2440=1 ## Package List:

Topics%20covered

Topics Covered

security advisory SuSE DoS important glibc 3 vulnerabilities

References

* bsc#1261206

* bsc#1262464

* bsc#1262465

Cross-

* CVE-2026-4046

* CVE-2026-5450

* CVE-2026-5928

CVSS scores:

* CVE-2026-4046 ( SUSE ): 8.7

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

* CVE-2026-4046 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-4046 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-5450 ( SUSE ): 5.1

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

* CVE-2026-5450 ( SUSE ): 5.9 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

* CVE-2026-5450 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-5928 ( SUSE ): 5.9

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

* CVE-2026-5928 ( SUSE ): 5.7 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2440-1
Release Date: 2026-06-18T07:08:20Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE DoS important glibc 3 vulnerabilities

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