# CVE-2026-97041: Host linker flag injection via //go:cgo_* directives in cmd/compile and cmd/link

Status: published. Published: 2026-11-11. Updated: 2026-11-11.

Building a malicious package containing "//go:cgo_*" compiler directives could inject arbitrary flags into the external linker invocation on ELF platforms. The compiler and linker did not reject commas in "//go:cgo_import_dynamic", "//go:cgo_export_dynamic", "//go:cgo_export_static", "//go:cgo_import_static", and "//go:cgo_dynamic_linker" directives, and the linker passed the dynamic linker path using "-Wl,--dynamic-linker,<path>". Furthermore, the two-argument form of "//go:cgo_import_dynamic" (which is permitted in non-cgo Go source files) could overwrite the external symbol name of a symbol already marked for cgo export. A symbol name or dynamic linker path containing a comma or leading "@" could split "-Wl,--export-dynamic-symbol=" or "-Wl,--dynamic-linker," into arbitrary host linker flags or response file arguments. The compiler and linker now reject commas in "//go:cgo_*" symbol and dynamic linker directives, the linker passes "-Wl,--dynamic-linker=<path>", and "cgo_import_dynamic" no longer overwrites symbols exported via "cgo_export_dynamic" or "cgo_export_static".

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Go toolchain / cmd/compile (cmd/compile): ≥ 0; < 1.26.11 (affected, semver); ≥ 1.27.0-0; < 1.27.4 (affected, semver). Source: CNA: Go
- Go toolchain / cmd/link (cmd/link): ≥ 0; < 1.26.11 (affected, semver); ≥ 1.27.0-0; < 1.27.4 (affected, semver). Source: CNA: Go

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-88

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://go.dev/cl/862154 (CNA: Go)

- https://go.dev/issue/82569 (CNA: Go)

- https://groups.google.com/g/golang-announce/c/iY8TY0wWgbM (CNA: Go)

- https://pkg.go.dev/vuln/GO-2026-6850 (CNA: Go)

## Provenance

- CNA: Go: https://www.cve.org/CVERecord?id=CVE-2026-97041; retrieved 2026-11-11; source updated 2026-11-11

Revision: 4fe90310573769dd92dba4616a9a1dd2675a2fca1544618e10758e36f23db8f8

Canonical: https://y2.dev/cve/CVE-2026-97041

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