CVE-2026-27144

Miscompilation allows memory corruption via CONVNOP-wrapped array copy in cmd/compile

State: Published
Severity: 7.1 High
Published: Apr 8, 2026
Updated: Apr 13, 2026
Reserved: Feb 17, 2026

Description

The compiler is meant to unwrap pointers which are the operands of a memory move; a no-op interface conversion prevented the compiler from making the correct determination about non-overlapping moves, potentially leading to memory corruption at runtime.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
cmd/compileGo toolchain	before 1.25.9Affected 1.26.0-0 to before 1.26.2Affected

References

https://go.dev/cl/763764
https://go.dev/issue/78371
https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU
https://pkg.go.dev/vuln/GO-2026-4867

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