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SUSE nghttp2 DoS Assertion Failure Advisory 2026-1247-1 CVE-2026-27135

suse
Calendar Grey April 10, 2026
Dist Suse Esm H88
SUSE security update for nghttp2 addresses an important vulnerability with potential DoS implications. Update now.
An update that solves one vulnerability can now be installed.

Summary

## This update for nghttp2 fixes the following issue: * CVE-2026-27135: assertion failure due to missing state validation can lead to DoS (bsc#1259845). ## 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 for SAP Applications 15 SP4 zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-1247=1 * SUSE Linux Enterprise Server for SAP Applications 15 SP5 zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-1247=1 * SUSE Linux Enterprise Micro 5.2 zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-1247=1 * SUSE Linux Enterprise Micro for Rancher 5.2 zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-1247=1

Topics%20covered

Topics Covered

security advisory SuSE DoS important nghttp2 cve-2026-27135

References

* bsc#1259845

Cross-

* CVE-2026-27135

CVSS scores:

* CVE-2026-27135 ( SUSE ): 8.2

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

* CVE-2026-27135 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-27135 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products:

* 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

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5

* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4

* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5

* SUSE Linux Enterprise Micro 5.2

* SUSE Linux Enterprise Micro 5.3

* SUSE Linux Enterprise Micro 5.4

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:1247-1
Release Date: 2026-04-10T10:35:16Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE DoS important nghttp2 cve-2026-27135

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