Security update for go1.26

Announcement ID:	SUSE-SU-2026:0876-1
Release Date:	2026-03-11T18:35:52Z
Rating:	moderate
References:	bsc#1255111 bsc#1259264 bsc#1259265 bsc#1259266 bsc#1259267 bsc#1259268
Cross-References:	CVE-2026-25679 CVE-2026-27137 CVE-2026-27138 CVE-2026-27139 CVE-2026-27142
CVSS scores:	CVE-2026-25679 ( SUSE ): 4.6 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVE-2026-25679 ( SUSE ): 3.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N CVE-2026-25679 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-27137 ( SUSE ): 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVE-2026-27137 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVE-2026-27137 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-27138 ( 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-2026-27138 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-27138 ( NVD ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-27139 ( SUSE ): 4.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVE-2026-27139 ( SUSE ): 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CVE-2026-27139 ( NVD ): 2.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N CVE-2026-27142 ( SUSE ): 5.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVE-2026-27142 ( SUSE ): 5.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N CVE-2026-27142 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products:	Development Tools Module 15-SP7 openSUSE Leap 15.6 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 five vulnerabilities and has one security fix can now be installed.

Description:

This update for go1.26 fixes the following issues:

Update to go1.26.1 (bsc#1255111):

• CVE-2026-25679: net/url: reject IPv6 literal not at start of host (bsc#1259264).
• CVE-2026-27137: crypto/x509: incorrect enforcement of email constraints (bsc#1259266).
• CVE-2026-27138: crypto/x509: panic in name constraint checking for malformed certificates (bsc#1259267).
• CVE-2026-27139: os: FileInfo can escape from a Root (bsc#1259268).
• CVE-2026-27142: html/template: URLs in meta content attribute actions are not escaped (bsc#1259265).

Changelog:

• go#77252 cmd/compile: miscompile of global array initialization
• go#77407 os: Go 1.25.x regression on RemoveAll for windows
• go#77474 cmd/go: CGO compilation fails after upgrading from Go 1.25.5 to 1.25.6 due to --define-variable flag in pkg-config
• go#77529 cmd/fix, x/tools/go/analysis/passes/modernize: stringscut: OOB panic in indexArgValid analyzing "buf.Bytes()" call
• go#77532 net/smtp: expiry date of localhostCert for testing is too short
• go#77536 cmd/compile: internal compiler error: 'main.func1': not lowered: v15, Load STRUCT PTR SSA
• go#77618 strings: HasSuffix doesn't work correctly for multibyte runes in go 1.26
• go#77623 cmd/compile: internal compiler error on : "tried to free an already free register" with generic function and type >= 192 bytes
• go#77624 cmd/fix, x/tools/go/analysis/passes/modernize: stringsbuilder breaks code when combining two strings.Builders
• go#77680 cmd/link: TestFlagW/-w_-linkmode=external fails on illumos
• go#77766 cmd/fix,x/tools/go/analysis/passes/modernize: rangeint uses target platform's type in the range expression, breaking other platforms
• go#77780 reflect: breaking change for reflect.Value.Interface behaviour
• go#77786 cmd/compile: rewriteFixedLoad does not properly sign extend AuxInt
• go#77803 cmd/fix,x/tools/go/analysis/passes/modernize: reflect.TypeOf(nil) transformed into reflect.TypeForuntyped nil
• go#77804 cmd/fix,x/tools/go/analysis/passes/modernize: minmax breaks select statements
• go#77805 cmd/fix, x/tools/go/analysis/passes/modernize: waitgroup leads to a compilation error
• go#77807 cmd/fix,x/tools/go/analysis/passes/modernize: stringsbuilder ignores variables if they are used multiple times
• go#77849 cmd/fix,x/tools/go/analysis/passes/modernize: stringscut rewrite changes behavior
• go#77860 cmd/go: change go mod init default go directive back to 1.N
• go#77899 cmd/fix, x/tools/go/analysis/passes/modernize: bad rangeint rewriting
• go#77904 x/tools/go/analysis/passes/modernize: stringsbuilder breaks code when GenDecl is a block declaration

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-SP7-2026-876=1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-876=1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-876=1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-876=1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-876=1
• SUSE Linux Enterprise Server 15 SP4 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-876=1
• SUSE Linux Enterprise Server 15 SP5 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-876=1
• SUSE Linux Enterprise Server 15 SP6 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-876=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP4
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-876=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP5
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-876=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-876=1
• openSUSE Leap 15.6
  zypper in -t patch openSUSE-SLE-15.6-2026-876=1

Package List:

• Development Tools Module 15-SP7 (aarch64 ppc64le s390x x86_64)
  • go1.26-race-1.26.1-150000.1.6.1
  • go1.26-doc-1.26.1-150000.1.6.1
  • go1.26-1.26.1-150000.1.6.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64 x86_64)
  • go1.26-race-1.26.1-150000.1.6.1
  • go1.26-doc-1.26.1-150000.1.6.1
  • go1.26-1.26.1-150000.1.6.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64 x86_64)
  • go1.26-race-1.26.1-150000.1.6.1
  • go1.26-doc-1.26.1-150000.1.6.1
  • go1.26-1.26.1-150000.1.6.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (aarch64 x86_64)
  • go1.26-race-1.26.1-150000.1.6.1
  • go1.26-doc-1.26.1-150000.1.6.1
  • go1.26-1.26.1-150000.1.6.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (aarch64 x86_64)
  • go1.26-race-1.26.1-150000.1.6.1
  • go1.26-doc-1.26.1-150000.1.6.1
  • go1.26-1.26.1-150000.1.6.1
• SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)
  • go1.26-race-1.26.1-150000.1.6.1
  • go1.26-doc-1.26.1-150000.1.6.1
  • go1.26-1.26.1-150000.1.6.1
• SUSE Linux Enterprise Server 15 SP5 LTSS (aarch64 ppc64le s390x x86_64)
  • go1.26-race-1.26.1-150000.1.6.1
  • go1.26-doc-1.26.1-150000.1.6.1
  • go1.26-1.26.1-150000.1.6.1
• SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 ppc64le s390x x86_64)
  • go1.26-race-1.26.1-150000.1.6.1
  • go1.26-doc-1.26.1-150000.1.6.1
  • go1.26-1.26.1-150000.1.6.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)
  • go1.26-race-1.26.1-150000.1.6.1
  • go1.26-doc-1.26.1-150000.1.6.1
  • go1.26-1.26.1-150000.1.6.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP5 (ppc64le x86_64)
  • go1.26-race-1.26.1-150000.1.6.1
  • go1.26-doc-1.26.1-150000.1.6.1
  • go1.26-1.26.1-150000.1.6.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6 (ppc64le x86_64)
  • go1.26-race-1.26.1-150000.1.6.1
  • go1.26-doc-1.26.1-150000.1.6.1
  • go1.26-1.26.1-150000.1.6.1
• openSUSE Leap 15.6 (aarch64 ppc64le s390x x86_64)
  • go1.26-race-1.26.1-150000.1.6.1
  • go1.26-doc-1.26.1-150000.1.6.1
  • go1.26-1.26.1-150000.1.6.1

References:

• https://www.suse.com/security/cve/CVE-2026-25679.html
• https://www.suse.com/security/cve/CVE-2026-27137.html
• https://www.suse.com/security/cve/CVE-2026-27138.html
• https://www.suse.com/security/cve/CVE-2026-27139.html
• https://www.suse.com/security/cve/CVE-2026-27142.html
• https://bugzilla.suse.com/show_bug.cgi?id=1255111
• https://bugzilla.suse.com/show_bug.cgi?id=1259264
• https://bugzilla.suse.com/show_bug.cgi?id=1259265
• https://bugzilla.suse.com/show_bug.cgi?id=1259266
• https://bugzilla.suse.com/show_bug.cgi?id=1259267
• https://bugzilla.suse.com/show_bug.cgi?id=1259268