SUSE-SU-2026:2327-1: moderate: Security update for go1.26

SLE-UPDATES null at suse.de
Wed Jun 10 08:30:18 UTC 2026 

# Security update for go1.26

Announcement ID: SUSE-SU-2026:2327-1  
Release Date: 2026-06-09T19:06:53Z  
Rating: moderate  
References:

  * bsc#1255111
  * bsc#1267442
  * bsc#1267444
  * bsc#1267450

  
Cross-References:

  * CVE-2026-27145
  * CVE-2026-42504
  * CVE-2026-42507

  
CVSS scores:

  * CVE-2026-27145 ( SUSE ):  4.6
    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-27145 ( SUSE ):  3.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
  * CVE-2026-27145 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
  * CVE-2026-42504 ( SUSE ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-42504 ( SUSE ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
  * CVE-2026-42504 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-42507 ( SUSE ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-42507 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-42507 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

  
Affected Products:

  * Development Tools Module 15-SP7
  * SUSE Linux Enterprise Desktop 15 SP7
  * 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 Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP4
  * SUSE Linux Enterprise Server 15 SP4 LTSS
  * SUSE Linux Enterprise Server 15 SP5
  * SUSE Linux Enterprise Server 15 SP5 LTSS
  * SUSE Linux Enterprise Server 15 SP6
  * SUSE Linux Enterprise Server 15 SP6 LTSS
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4
  * SUSE Linux Enterprise Server for SAP Applications 15 SP5
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7

  
  
An update that solves three vulnerabilities and has one security fix can now be
installed.

## Description:

This update for go1.26 fixes the following issues

Update to go1.26.4 (bsc#1255111):

  * CVE-2026-27145: crypto/x509: split candidate hostname only once
    (bsc#1267450).
  * CVE-2026-42504: mime: quadratic complexity in WordDecoder.DecodeHeader
    (bsc#1267442).
  * CVE-2026-42507: net/textproto: arbitrary input are included in errors
    without any escaping (bsc#1267444).

Changes:

  * go#79230 go#79217 boo#1267442 security: fix CVE-2026-42504 mime: quadratic
    complexity in WordDecoder.DecodeHeader
  * go#79426 go#79346 boo#1267444 security: fix CVE-2026-42507 net/textproto:
    arbitrary input are included in errors without any escaping
  * go#79701 go#79694 boo#1267450 security: fix CVE-2026-27145 crypto/x509:
    split candidate hostname only once
  * go#79191 cmd/compile: Bug in rewrite rules for AMD64 causes SHL instruction
    overflow and miscompilation
  * go#79226 crypto/internal/fips140/drbg: backport CL 774221 to Go 1.26
  * go#79349 cmd/fix: x/tools/go/analysis/passes/modernize: slicescontains
    hoists needle expression, changing side effect count
  * go#79686 runtime/race: change in 93a4f03 leads to a failed build on Amazon
    Linux 2 and arm64

## 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:

  * Development Tools Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Development-Tools-15-SP7-2026-2327=1

  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-2327=1

  * SUSE Linux Enterprise Server 15 SP4 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-2327=1

  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-2327=1

  * SUSE Linux Enterprise Server 15 SP5 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-2327=1

  * SUSE Linux Enterprise Server 15 SP6 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-2327=1

  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-2327=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP4  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-2327=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP5  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-2327=1

  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-2327=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP6  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-2327=1

## Package List:

  * Development Tools Module 15-SP7 (aarch64 ppc64le s390x x86_64)
    * go1.26-race-1.26.4-150000.1.15.1
    * go1.26-doc-1.26.4-150000.1.15.1
    * go1.26-1.26.4-150000.1.15.1
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64
    x86_64)
    * go1.26-race-1.26.4-150000.1.15.1
    * go1.26-doc-1.26.4-150000.1.15.1
    * go1.26-1.26.4-150000.1.15.1
  * SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)
    * go1.26-1.26.4-150000.1.15.1
    * go1.26-doc-1.26.4-150000.1.15.1
    * go1.26-race-1.26.4-150000.1.15.1
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64
    x86_64)
    * go1.26-race-1.26.4-150000.1.15.1
    * go1.26-doc-1.26.4-150000.1.15.1
    * go1.26-1.26.4-150000.1.15.1
  * SUSE Linux Enterprise Server 15 SP5 LTSS (aarch64 ppc64le s390x x86_64)
    * go1.26-race-1.26.4-150000.1.15.1
    * go1.26-doc-1.26.4-150000.1.15.1
    * go1.26-1.26.4-150000.1.15.1
  * SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 ppc64le s390x x86_64)
    * go1.26-race-1.26.4-150000.1.15.1
    * go1.26-doc-1.26.4-150000.1.15.1
    * go1.26-1.26.4-150000.1.15.1
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (aarch64
    x86_64)
    * go1.26-race-1.26.4-150000.1.15.1
    * go1.26-doc-1.26.4-150000.1.15.1
    * go1.26-1.26.4-150000.1.15.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)
    * go1.26-race-1.26.4-150000.1.15.1
    * go1.26-doc-1.26.4-150000.1.15.1
    * go1.26-1.26.4-150000.1.15.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP5 (ppc64le x86_64)
    * go1.26-race-1.26.4-150000.1.15.1
    * go1.26-doc-1.26.4-150000.1.15.1
    * go1.26-1.26.4-150000.1.15.1
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (aarch64
    x86_64)
    * go1.26-race-1.26.4-150000.1.15.1
    * go1.26-doc-1.26.4-150000.1.15.1
    * go1.26-1.26.4-150000.1.15.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6 (ppc64le x86_64)
    * go1.26-race-1.26.4-150000.1.15.1
    * go1.26-doc-1.26.4-150000.1.15.1
    * go1.26-1.26.4-150000.1.15.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-27145.html
  * https://www.suse.com/security/cve/CVE-2026-42504.html
  * https://www.suse.com/security/cve/CVE-2026-42507.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1255111
  * https://bugzilla.suse.com/show_bug.cgi?id=1267442
  * https://bugzilla.suse.com/show_bug.cgi?id=1267444
  * https://bugzilla.suse.com/show_bug.cgi?id=1267450

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