High 8.1Published Apr 9, 2026

CVE-2026-40200An issue was discovered in musl libc 0.7.10 through 1.2.6.

Updated under an hour ago (Oct 26, 2026, 3:40 PM ET)

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Exploited in the last 30 days

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).

CVSS: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-670
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: mitre
NVD analysis: Deferred
Record last updated: Apr 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

musl-libc musl musl_libc:musl (from the name)	from 0.7.10 through 1.2.6	CNA record

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.