CVE-2026-39824
Invoking integer overflow in NewNTUnicodeString in golang.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.
INFO
Published Date :
May 22, 2026, 8:16 p.m.
Last Modified :
May 27, 2026, 2:16 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-39824
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | LOW | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Validate input string length against maximum allowed size.
- Truncate or reject oversized strings.
- Implement proper size checks in string handling functions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-39824.
| URL | Resource |
|---|---|
| https://go.dev/cl/770080 | |
| https://go.dev/issue/78916 | |
| https://groups.google.com/g/golang-announce/c/6MMI8Lj-Atg | |
| https://pkg.go.dev/vuln/GO-2026-5024 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-39824 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-39824
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-39824 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-39824 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Added CWE CWE-190 -
New CVE Received by [email protected]
May. 22, 2026
Action Type Old Value New Value Added 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. Added Reference https://go.dev/cl/770080 Added Reference https://go.dev/issue/78916 Added Reference https://groups.google.com/g/golang-announce/c/6MMI8Lj-Atg Added Reference https://pkg.go.dev/vuln/GO-2026-5024