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CVE-2018-6798

26
FAUCET Score

CVE-2018-6798 is a heap-based buffer over-read vulnerability affecting Perl versions 5.22 through 5.26, specifically impacting canonical, debian, perl, and redhat distributions. This flaw, triggered by matching a crafted locale-dependent regular expression, carries a high CVSS score of 7.5 due to its network-based attack vector and low attack complexity, potentially leading to information disclosure. Despite its severity, there is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
>= 5.22, <= 5.26CPE matchmatch criteria
cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.00%
Probability of exploitation in next 30 days
EPSS Percentile
89.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0401 is in the 81st percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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 (5)

redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-perl524-perl-4:5.24.0-380.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: rh-perl524-perl-4:5.24.0-380.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-perl524-perl-4:5.24.0-380.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUSFixed in: rh-perl524-perl-4:5.24.0-380.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: rh-perl524-perl-4:5.24.0-380.el7
View patch

Vendor Advisories (1)

redhatCVE-2018-6798Moderate

perl: heap read overflow in regexec.c

Apr 14, 2018

References

access.redhat.com / errata/RHSA-2018:1192
Third Party Advisory
rt.perl.org / Public/Bug/Display.html
Vendor Advisory
security.gentoo.org / glsa/201909-01
usn.ubuntu.com / 3625-1
Third Party Advisory
debian.org / security/2018/dsa-4172
Third Party Advisory
oracle.com / security-alerts/cpujul2020.html
securitytracker.com / id/1040681
Third Party AdvisoryVDB Entry