CVE-2026-39824

Invoking integer overflow in NewNTUnicodeString in golang.org/x/sys/windows

LOW
3.3
CVSS Score
Published: May 22, 2026 at 07:39 PM UTC
Updated: July 23, 2026 at 07:32 PM UTC
1 product affected across 1 vendorSys

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Severity
LOW3.3
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

NewNTUnicodeString does not check for string length overflow. When provided with a string that overflows the maximum size of a NTUnicodeString (a 16-bit number of bytes), it returns a truncated string rather than an error.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.44.0
Affected range stops below 0.44.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.3LOWCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-190

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