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    CVE-2026-40200

    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).

    Published:Apr 10, 2026
    Last Modified:Apr 14, 2026
    EPS:Apr 10, 2026
    EPSS Score:0.00014
    CVSS Score:8.1

    Affected Products

    Vendor
    Musl-libc
    Product
    Musl

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Related CVEs

    CVE-2025-26519 (CVSS 8.1) — musl libc 0.9.13 through 1.2.5 before 1.2.6 has an out-of-bounds write vulnerability when an attacker can trig…
    CVE-2020-28928 (CVSS 5.5) — In musl libc through 1.2.1, wcsnrtombs mishandles particular combinations of destination buffer size and sourc…
    CVE-2014-3484 (CVSS 9.8) — Multiple stack-based buffer overflows in the __dn_expand function in network/dn_expand.c in musl libc 1.1x bef…
    CVE-2019-14697 (CVSS 9.8) — musl libc through 1.1.23 has an x87 floating-point stack adjustment imbalance, related to the math/i386/ direc…
    CVE-2017-15650 (CVSS 7.5) — musl libc before 1.1.17 has a buffer overflow via crafted DNS replies because dns_parse_callback in network/lo…
    CVE-2015-1817 (CVSS 9.8) — Stack-based buffer overflow in the inet_pton function in network/inet_pton.c in musl libc 0.9.15 through 1.0.4…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High