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    CVE-2018-18520

    An Invalid Memory Address Dereference exists in the function elf_end in libelf in elfutils through v0.174. Although eu-size is intended to support ar files inside ar files, handle_ar in size.c closes the outer ar file before handling all inner entries. The vulnerability allows attackers to cause a denial of service (application crash) with a crafted ELF file.

    Published:Oct 17, 2018
    Last Modified:Nov 21, 2024
    EPS:Oct 19, 2018
    EPSS Score:0.01158
    CVSS Score:6.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Elfutils Project
    Product
    Elfutils
    Vendor
    Opensuse
    Product
    Leap
    Vendor
    Redhat
    Product
    Ansible Tower
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Desktop
    Vendor
    Redhat
    Product
    Enterprise Linux Server
    Vendor
    Redhat
    Product
    Enterprise Linux Workstation

    Exploits

    https://sourceware.org/bugzilla/show_bug.cgi?id=23787https://sourceware.org/bugzilla/show_bug.cgi?id=23787

    Related CVEs

    CVE-2026-13476 (CVSS 7.3) — IBM Informix Dynamic Server 14.10, 15.0, and 12.10 could allow an unauthenticated user to execute arbitrary co…
    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00052.html
    https://access.redhat.com/errata/RHSA-2019:2197
    https://lists.debian.org/debian-lts-announce/2019/02/msg00036.html
    https://lists.debian.org/debian-lts-announce/2021/10/msg00030.html
    https://sourceware.org/bugzilla/show_bug.cgi?id=23787
    https://sourceware.org/ml/elfutils-devel/2018-q4/msg00057.html
    https://usn.ubuntu.com/4012-1/
    http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00052.html
    https://access.redhat.com/errata/RHSA-2019:2197
    https://lists.debian.org/debian-lts-announce/2019/02/msg00036.html
    https://lists.debian.org/debian-lts-announce/2021/10/msg00030.html
    https://sourceware.org/bugzilla/show_bug.cgi?id=23787
    https://sourceware.org/ml/elfutils-devel/2018-q4/msg00057.html
    https://usn.ubuntu.com/4012-1/

    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