PT-2026-31986 · Musl Libc · Musl Libc

Published 2026-04-10 · Updated 2026-05-03 · CVE-2026-40200

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

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

ECHO-44B5-F48B-3822

OESA-2026-1927

OESA-2026-1928

OESA-2026-2087

OESA-2026-2088

OESA-2026-2178

Affected Products

Musl Libc

References · 25

• https://osv.dev/vulnerability/UBUNTU-CVE-2026-40200 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-40200 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-6042 · Security Note
• https://osv.dev/vulnerability/OESA-2026-1928 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1927 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-40200 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2026-40200 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2087 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-40200 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-40200 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-40200 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-40200 · Security Note
• https://osv.dev/vulnerability/OESA-2026-2088 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2178 · Vendor Advisory
• https://openwall.com/lists/oss-security/2026/04/10/13 · Note