What’s Vulnerable › Vulnerabilities

CVE-2026-40200

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-10 · updated 2026-06-17
• Weakness: CWE-670

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).

Affected products

• musl-libc musl: from 0.7.10 through 1.2.6

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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