CVE-2026-6554

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    CVE-2026-6554

    Published: 5 Sept 2026Last Modified: 27 Sept 2026

    Summary: infinte loop in libpcap before 1.10.7

    Details: libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. In particular uncommon use cases a crafted filter program can cause the interpreter to loop infinitely.

    References: https://github.com/the-tcpdump-group/libpcap/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6554.json, https://nvd.nist.gov/vuln/detail/CVE-2026-6554, https://github.com/the-tcpdump-group/libpcap/commit/ff3c83475ac303c6b681c52ad0b6e14795a8e0ce

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -ff3c83475ac303c6b681c52ad0b6e14795a8e0ce

    Affected versions

    libpcap-1.10.6
    libpcap-1.10.5
    libpcap-1.10.4
    libpcap-1.10.3
    libpcap-1.10.2
    libpcap-1.10.1
    libpcap-1.10.0

    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
    CVE-2026-6554 | CVE-DB