Linker script injection via split -Wl, flags and Darwin or symbol linker flags in cgo in cmd/go

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-97037
StatePUBLISHED
AssignerGo
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-11 05:19:57 UTC
Updated2026-11-11 05:19:57 UTC
DescriptionBuilding a malicious package that uses cgo could cause arbitrary code execution at link time by passing linker script files to the host linker via "#cgo LDFLAGS". Split "-Wl," flags that consume a following argument (such as "-Wl,-rpath", "-Wl,--just-symbols", and "-Wl,-undefined") previously accepted a bare second argument without a "-Wl," prefix, which the compiler driver passes directly to the linker as a positional input file. Additionally, when using GNU ld.bfd, flags such as "-framework", "-Wl,-framework", "-Wl,-undefined", "-Wl,--just-symbols", "-Wl,-R", "-Wl,-subsystem", and (on non-Darwin platforms) "-Wl,-sectcreate" could cause ld.bfd to interpret their arguments as linker scripts if they named a regular file on disk. The go command now requires a "-Wl," prefix on the second token of split "-Wl," flags (except "-Wl,-R"), verifies that these flags do not reference linker script files, and disallows bare "-Wl,--warn-backrefs-exclude".

Risk And Classification

Problem Types: CWE-94: Improper Control of Generation of Code ('Code Injection')

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Go Toolchain Cmd/go affected 1.26.11 semver Not specified
CNA Go Toolchain Cmd/go affected 1.27.0-0 1.27.4 semver Not specified

References

ReferenceSourceLinkTags
groups.google.com/g/golang-announce/c/iY8TY0wWgbM [email protected] groups.google.com
go.dev/issue/82573 [email protected] go.dev
pkg.go.dev/vuln/GO-2026-6854 [email protected] pkg.go.dev
go.dev/cl/862150 [email protected] go.dev
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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