PT-2026-31986 · Musl Libc · Musl Libc

Published 2026-04-10 · Updated 2026-04-11 · CVE-2026-40200

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

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

Name of the Vulnerable Software and Affected Versions musl libc versions 0.7.10 through 1.2.6

Description A stack-based memory corruption issue exists during the sorting of very large arrays using the qsort function, due to incorrectly implemented double-word primitives. The number of elements must exceed approximately seven million on 32-bit platforms. On 64-bit platforms, the threshold is not practical.

Recommendations Update to a version later than 1.2.6.

Fix

Weakness Enumeration

CWE-670

Related Identifiers

CVE-2026-40200

Affected Products

Musl Libc

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-40200 · Security Note
• https://twitter.com/oss_security/status/2042782276279230718 · Twitter Post
• https://musl.libc.org/releases.html · Note
• http://openwall.com/lists/oss-security/2026/04/10/13 · Note
• https://openwall.com/lists/oss-security/2026/04/10/13 · Note