CVE-2026-40200

State: Published
Severity: 8.1 High
Published: Apr 10, 2026
Updated: Apr 14, 2026
Reserved: Apr 10, 2026

Description

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).

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H	mitre

Weaknesses

CWE-670 Always-Incorrect Control Flow Implementation

Affected Products

Product	Versions
muslmusl-libc	0.7.10 through 1.2.6Affected

References

https://musl.libc.org/releases.html
https://www.openwall.com/lists/oss-security/2026/04/10/13
http://www.openwall.com/lists/oss-security/2026/04/10/13

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