CVE-2026-39824 | BDVDB-2026-334546 Detail

golang.org/x/sysgolang.org/x/sys/windows

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.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact low, availability impact none. Attack vector: local.

Weaknesses#

CWE-190 Integer Overflow or Wraparound

References#

Exploit#

No public exploit known

History#

Version 12026-05-22Record published in the CVE List.
Version 22026-05-27Most recent update recorded in the CVE List.

Published

Published: 2026-05-22
Last modified: 2026-05-27

Vendor information

Vendor: golang.org/x/sys
Product: golang.org/x/sys/windows

All golang.org/x/sys vulnerabilities

Score

3.3 Low

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 1.5.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 0.44.0
Fixed
0.44.0

Scoring System

CVSS v4.0

Not available

CVSS v3.1

3.3 Low

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

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

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).