CVE-2026-39824

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

State: Published
Severity: 3.3 Low
Published: May 22, 2026
Updated: May 27, 2026
Reserved: Apr 7, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	3.3 Low	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N	CISA-ADP

Weaknesses

CWE-190 Integer Overflow or Wraparound

Affected Products

Product	Versions
golang.org/x/sys/windowsgolang.org/x/sys	before 0.44.0Affected

References

https://go.dev/issue/78916
https://go.dev/cl/770080
https://groups.google.com/g/golang-announce/c/6MMI8Lj-Atg
https://pkg.go.dev/vuln/GO-2026-5024

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