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

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Summary

CVECVE-2026-27144
StatePUBLISHED
AssignerGo
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-08 02:16:03 UTC
Updated2026-04-16 19:17:18 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

EPSS: 0.000080000 probability, percentile 0.006900000 (date 2026-04-15)

Problem Types: CWE-843 | CWE-440: Expected Behavior Violation

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
3.1ADPDECLARED7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Golang Go All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Go Toolchain Cmd/compile affected 1.25.9 semver Not specified
CNA Go Toolchain Cmd/compile affected 1.26.0-0 1.26.2 semver Not specified

References

ReferenceSourceLinkTags
pkg.go.dev/vuln/GO-2026-4867 [email protected] pkg.go.dev Vendor Advisory
go.dev/issue/78371 [email protected] go.dev Issue Tracking
go.dev/cl/763764 [email protected] go.dev Patch
groups.google.com/g/golang-announce/c/0uYbvbPZRWU [email protected] groups.google.com Release Notes, Mailing List
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Jakub Ciolek - https://ciolek.dev/ (en)

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