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MEDIUM

CVE-2018-18520

CVSS v3

6.5

MEDIUM

EPSS Score

2.8 %

exploit probability, as of 2026-10-18

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2018-18520 Red Hat Product Security443 products fixed · 9 known affected

    elfutils: eu-size cannot handle recursive ar files

    elfutils as a component of Red Hat Enterprise Linux 5 · elfutils as a component of Red Hat Enterprise Linux 6 · elfutils-devel as a component of Red Hat Enterprise Linux 6

  • RHBA-2020:0547 Red Hat Product Security3 products fixed

    Red Hat Bug Fix Advisory: Container Image Rebuild for Ansible Tower 3.4 Dependency

  • RHSA-2019:2197 Red Hat Product Security119 products fixed

    Red Hat Security Advisory: elfutils security, bug fix, and enhancement update

Full record on NVD

Description

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.

Technical details

Published
2018-10-19

Frequently asked questions

What is 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.

Is CVE-2018-18520 actively exploited?

Active exploitation of CVE-2018-18520 has not been confirmed. Its EPSS score was 2.8% on 2026-10-18, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-18520?

CVE-2018-18520 has a CVSS v3 base score of 6.5 (MEDIUM severity).

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