When using GCC, building a malicious package that uses cgo could cause arbitrary command execution at link time via untrusted GCC spec files ("specs" or "*.spec"). When linking with "-fopenmp", "-fopenacc", or "-fsanitize=" in "#cgo LDFLAGS", GCC's built-in link spec evaluates "%:include(libgomp.spec)" or "%:include(libsanitizer.spec)" and searches for spec files in "-L" and sysroot directories (including subdirectories and multilib sibling directories such as "../lib64"), as well as the working directory when "-fopenmp" or "-fopenacc" is used or when "-fsanitize=" is combined with "-static" or "-static-lib*". The go command now rejects "-L", "-isysroot", and "-Wl,-syslibroot" directories (and the working and package directories when applicable) that contain GCC spec files, and disallows "@" and "-" prefixes in "-fsanitize=" compiler flag values.
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Workaround
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References
History
Wed, 11 Nov 2026 03:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | When using GCC, building a malicious package that uses cgo could cause arbitrary command execution at link time via untrusted GCC spec files ("specs" or "*.spec"). When linking with "-fopenmp", "-fopenacc", or "-fsanitize=" in "#cgo LDFLAGS", GCC's built-in link spec evaluates "%:include(libgomp.spec)" or "%:include(libsanitizer.spec)" and searches for spec files in "-L" and sysroot directories (including subdirectories and multilib sibling directories such as "../lib64"), as well as the working directory when "-fopenmp" or "-fopenacc" is used or when "-fsanitize=" is combined with "-static" or "-static-lib*". The go command now rejects "-L", "-isysroot", and "-Wl,-syslibroot" directories (and the working and package directories when applicable) that contain GCC spec files, and disallows "@" and "-" prefixes in "-fsanitize=" compiler flag values. | |
| Title | Arbitrary command execution via GCC spec files in cgo linker search directories in cmd/go | |
| References |
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MITRE
Status: PUBLISHED
Assigner: Go
Published:
Updated: 2026-11-11T03:13:17.194Z
Reserved: 2026-09-23T23:04:46.550Z
Link: CVE-2026-97034
Vulnrichment
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NVD
Status : Received
Published: 2026-11-11T05:19:57.397
Modified: 2026-11-11T05:19:57.397
Link: CVE-2026-97034
Redhat
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OpenCVE Enrichment
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Weaknesses
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