CVE-2026-40200 HIGH

CVE-2026-40200

Vendor Musl-Libc
Product musl
Weakness CWE-670
Published April 10, 2026
Last update April 14, 2026

CVSS base score

8.1/10
Attack vector Local
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

An issue was discovered in musl libc 0.7.10 through 1.2.6. Stack-based memory corruption can occur during qsort of very large arrays, due to incorrectly implemented double-word primitives. The number of elements must exceed about seven million, i.e., the 32nd Leonardo number on 32-bit platforms (or the 64th Leonardo number on 64-bit platforms, which is not practical).

Key dates

02Disclosure timeline

April 10, 2026 CVE published
April 14, 2026 Record updated