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    2 vulnerabilities found for Data::Buffer::Shared by EGOR

    CVE-2026-64613 (GCVE-0-2026-64613)

    Vulnerability from nvd – Published: 2026-07-21 19:05 – Updated: 2026-07-23 12:25
    VLAI
    Title
    Data::Buffer::Shared versions before 0.05 for Perl create a world-readable mmap backing file and open it without O_NOFOLLOW
    Summary
    Data::Buffer::Shared versions before 0.05 for Perl create a world-readable mmap backing file and open it without O_NOFOLLOW. The segment is created in buf_generic.h with open(path, O_RDWR|O_CREAT|O_EXCL, 0666). O_EXCL blocks a pre-seeded file on create, but the mode is 0666, so under the default umask 022 the file is created mode 0644 (world-readable), and O_NOFOLLOW is absent, so a symlink planted at the path is followed when the segment is attached. A "Shared" segment naturally lives in a shared directory such as /tmp or /dev/shm, where any local user can read the IPC payloads stored in the world-readable segment, and a pre-planted symlink at the path redirects the open to another file.
    Severity
    6.2 (Medium)
    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-07-23 12:24 UTC
    CWE
    • CWE-732 - Incorrect Permission Assignment for Critical Resource
    • CWE-59 - Improper Link Resolution Before File Access
    Assigner
    References
    Impacted products
    Vendor Product Version
    EGOR Data::Buffer::Shared Affected: 0 , < 0.05 (custom)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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              "confidentialityImpact": "HIGH",
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              "userInteraction": "NONE",
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        "title": "CISA ADP Vulnrichment"
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    ],
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    CVE-2026-64613 (GCVE-0-2026-64613)

    Vulnerability from cvelistv5 – Published: 2026-07-21 19:05 – Updated: 2026-07-23 12:25
    VLAI
    Title
    Data::Buffer::Shared versions before 0.05 for Perl create a world-readable mmap backing file and open it without O_NOFOLLOW
    Summary
    Data::Buffer::Shared versions before 0.05 for Perl create a world-readable mmap backing file and open it without O_NOFOLLOW. The segment is created in buf_generic.h with open(path, O_RDWR|O_CREAT|O_EXCL, 0666). O_EXCL blocks a pre-seeded file on create, but the mode is 0666, so under the default umask 022 the file is created mode 0644 (world-readable), and O_NOFOLLOW is absent, so a symlink planted at the path is followed when the segment is attached. A "Shared" segment naturally lives in a shared directory such as /tmp or /dev/shm, where any local user can read the IPC payloads stored in the world-readable segment, and a pre-planted symlink at the path redirects the open to another file.
    Severity
    6.2 (Medium)
    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-07-23 12:24 UTC
    CWE
    • CWE-732 - Incorrect Permission Assignment for Critical Resource
    • CWE-59 - Improper Link Resolution Before File Access
    Assigner
    References
    Impacted products
    Vendor Product Version
    EGOR Data::Buffer::Shared Affected: 0 , < 0.05 (custom)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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