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CVE-2018-18521

21
FAUCET Score

CVE-2018-18521 is a divide-by-zero vulnerability in elfutils versions prior to 0.174, specifically within the arlib_add_symbols() function, affecting products from vendors like Canonical, Debian, and Red Hat. This medium-severity vulnerability (CVSS 5.5) can be triggered by a remote attacker providing a specially crafted ELF file, leading to a denial of service (application crash) due to mishandling of a zero sh_entsize. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
0.174CPE matchmatch criteria
cpe:2.3:a:elfutils_project:elfutils:0.174:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.82%
Probability of exploitation in next 30 days
EPSS Percentile
76.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0182 is in the 87th percentile among its peer group of 5,758 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

redhatpatch availablevia redhat_api
Product: Red Hat Ansible Tower 3.4 for RHEL 7Fixed in: ansible-tower-34/ansible-tower-memcached:1.4.15-28
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Ansible Tower 3.4 for RHEL 7Fixed in: ansible-tower-35/ansible-tower-memcached:1.4.15-28
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Ansible Tower 3.4 for RHEL 7Fixed in: ansible-tower-37/ansible-tower-memcached-rhel7:1.4.15-28
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: elfutils-0:0.176-2.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: elfutils
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: elfutils

Vendor Advisories (1)

redhatCVE-2018-18521Low

elfutils: Divide-by-zero in arlib_add_symbols function in arlib.c

Oct 17, 2018

References

lists.opensuse.org / opensuse-security-announce/2019-06/msg00052.html
Mailing ListThird Party Advisory
access.redhat.com / errata/RHSA-2019:2197
Third Party Advisory
lists.debian.org / debian-lts-announce/2019/02/msg00036.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2021/10/msg00030.html
Mailing ListThird Party Advisory
sourceware.org / bugzilla/show_bug.cgi
ExploitIssue TrackingThird Party Advisory
sourceware.org / ml/elfutils-devel/2018-q4/msg00055.html
Mailing ListPatchThird Party Advisory
usn.ubuntu.com / 4012-1
Third Party Advisory