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    CVE-2016-4557

    The replace_map_fd_with_map_ptr function in kernel/bpf/verifier.c in the Linux kernel before 4.5.5 does not properly maintain an fd data structure, which allows local users to gain privileges or cause a denial of service (use-after-free) via crafted BPF instructions that reference an incorrect file descriptor.

    Published:Apr 26, 2016
    Last Modified:Apr 12, 2025
    EPS:May 23, 2016
    EPSS Score:0.15042
    CVSS Score:7.8

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    https://www.exploit-db.com/exploits/40759https://www.exploit-db.com/exploits/39772

    Common Weakness Enumeration

    CWE-416 Use After Free

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7
    http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html
    http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5
    http://www.openwall.com/lists/oss-security/2016/05/06/4
    https://bugs.chromium.org/p/project-zero/issues/detail?id=808
    https://bugs.debian.org/823603
    https://bugzilla.redhat.com/show_bug.cgi?id=1334307
    https://github.com/torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7
    https://www.exploit-db.com/exploits/40759/
    http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7
    http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html
    http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5
    http://www.openwall.com/lists/oss-security/2016/05/06/4
    https://bugs.chromium.org/p/project-zero/issues/detail?id=808
    https://bugs.debian.org/823603
    https://bugzilla.redhat.com/show_bug.cgi?id=1334307
    https://github.com/torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7
    https://www.exploit-db.com/exploits/40759/

    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