CVE-2026-27144

Runtime memory corruption via misclassified array copy

Published Apr 8, 2026 · Updated Apr 8, 2026

Miscompilation in Go cmd/compile before 1.25.9 and 1.26.0 through 1.26.1 allows local users to cause runtime memory corruption in generated programs. The compiler's memory-move analysis fails to unwrap an array-copy pointer inside a no-op interface conversion and wrongly treats the move as non-overlapping. Compilation of source containing this operand shape can emit an unsafe move that corrupts memory when the resulting program runs.

CVSS severity7.1
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Miscompilation in Go cmd/compile before 1.25.9 and 1.26.0 through 1.26.1 allows local users to cause runtime memory corruption in generated programs. The compiler's memory-move analysis fails to unwrap an array-copy pointer inside a no-op interface conversion and wrongly treats the move as non-overlapping. Compilation of source containing this operand shape can emit an unsafe move that corrupts memory when the resulting program runs.

The record

CVE
CVE-2026-27144
Published
Apr 8, 2026
Updated
Apr 8, 2026
Vendor
Go
Product
compile command
Classifications
CWE-440
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.25.9
  2. Affected versionversion=1.26.0-0 <1.26.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Go · compile commandversion=0 <1.25.9; version=1.26.0-0 <1.26.2

Published CVSS scores

7.1CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-440Expected Behavior Violation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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