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    CVE-2026-107891

    musl libc before 1.2.7, when an untrusted regular expression is used with regcomp, has multiple integer overflows, possibly leading to incorrect allocation sizes and out-of-bounds heap writes.

    Published:Nov 5, 2026
    Last Modified:Nov 6, 2026
    EPS:Nov 5, 2026
    EPSS Score:0.00549
    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-2026-40200 (CVSS 8.1) — An issue was discovered in musl libc 0.7.10 through 1.2.6. Stack-based memory corruption can occur during qsor…
    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