SUSE-SU-2026:0976-1

SUSE-SU-2026:0976-1 · Security update for go1.26-openssl

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This page shows selected source facts. See the linked advisories for the complete description and affected versions.

This update for go1.26-openssl fixes the following issues: Update to go 1.26.1 (bsc#1255111, jsc#SLE-18320): - 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: * Fix fips140only test in boring mode * Fix fips140 only test * Add GODEBUG=fips140=auto mode (#341) * 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.TypeFor[untyped 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 - go1.26.0 (released 2026-02-10) is a major release of Go. go1.26.x minor releases will be provided through February 2027. https://github.com/golang/go/wiki/Go-Release-Cycle go1.26 arrives six months after Go 1.25. Most of its changes are in the implementation of the toolchain, runtime, and libraries. As always, the release maintains the Go 1 promise of compatibility. We expect almost all Go programs to continue to compile and run as before. * Language change: The built-in new function, which creates a new variable, now allows its operand to be an expression, specifying the initial value of the variable. * Language change: The restriction that a generic type may not refer to itself in its type parameter list has been lifted. It is now possible to specify type constraints that refer to the generic type being constrained. * go command: The venerable go fix command has been completely revamped and is now the home of Go's modernizers. It provides a dependable, push-button way to update Go code bases to the latest idioms and core library APIs. The initial suite of modernizers includes dozens of fixers to make use of modern features of the Go language and library, as well a source-level inliner that allows users to automate their own API migrations using //go:fix inline directives. These fixers should not change the behavior of your program, so if you encounter any issues with a fix performed by go fix, please report it. * go command: The rewritten go fix command builds atop the exact same Go analysis framework as go vet. This means the same analyzers that provide diagnostics in go vet can be used to suggest and apply fixes in go fix. The go fix command's historical fixers, all of which were obsolete, have been removed. * go command: Two upcoming Go blog posts will go into more detail on modernizers, the inliner, and how to get the most out of go fix. * go command: go mod init now defaults to a lower go version in new go.mod files. Running go mod init using a toolchain of version 1.N.X will create a go.mod file specifying the Go version go 1.(N-1).0. Pre-release versions of 1.N will create go.mod files specifying go 1.(N-2).0. For example, the Go 1.26 release candidates will create go.mod files with go 1.24.0, and Go 1.26 and its minor releases will create go.mod files with go 1.25.0. This is intended to encourage the creation of modules that are compatible with currently supported versions of Go. For additional control over the go version in new modules, go mod init can be followed up with go get go@version. * go command: cmd/doc, and go tool doc have been deleted. go doc can be used as a replacement for go tool doc: it takes the same flags and arguments and has the same behavior. * pprof: The pprof tool web UI, enabled with the -http flag, now defaults to the flame graph view. The previous graph view is available in the 'View -> Graph' menu, or via /ui/graph. * Runtime: The new Green Tea garbage collector, previously available as an experiment in Go 1.25, is now enabled by default after incorporating feedback. This garbage collector's design improves the performance of marking and scanning small objects through better locality and CPU scalability. Benchmark results vary, but we expect somewhere between a 10--40% reduction in garbage collection overhead in real-world programs that heavily use the garbage collector. Further improvements, on the order of 10% in garbage collection overhead, are expected when running on newer amd64-based CPU platforms (Intel Ice Lake or AMD Zen 4 and newer), as the garbage collector now leverages vector instructions for scanning small objects when possible. The new garbage collector may be disabled by setting GOEXPERIMENT=nogreenteagc at build time. This opt-out setting is expected to be removed in Go 1.27. If you disable the new garbage collector for any reason related to its performance or behavior, please file an issue. * Runtime: cgo: The baseline runtime overhead of cgo calls has been reduced by ~30%. * Runtime: Heap base address randomization: On 64-bit platforms, the runtime now randomizes the heap base address at startup. This is a security enhancement that makes it harder for attackers to predict memory addresses and exploit vulnerabilities when using cgo. This feature may be disabled by setting GOEXPERIMENT=norandomizedheapbase64 at build time. This opt-out setting is expected to be removed in a future Go release. * Runtime: Experimental goroutine leak profile: A new profile type that reports leaked goroutines is now available as an experiment. The new profile type, named goroutineleak in the runtime/pprof package, may be enabled by setting GOEXPERIMENT=goroutineleakprofile at build time. Enabling the experiment also makes the profile available as a net/http/pprof endpoint, /debug/pprof/goroutineleak. A leaked goroutine is a goroutine blocked on some concurrency primitive (channels, sync.Mutex, sync.Cond, etc) that cannot possibly become unblocked. The runtime detects leaked goroutines using the garbage collector: if a goroutine G is blocked on concurrency primitive P, and P is unreachable from an

Fix available

Published

2026-03-23T16:34:53Z

Updated

2026-03-25T08:31:04.747197Z

Stack: system

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