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CVE-2018-18314

33
FAUCET Score

CVE-2018-18314 describes a critical buffer overflow vulnerability in Perl versions prior to 5.26.3, affecting products from vendors like Canonical, Debian, NetApp, and Red Hat. This flaw, rated 9.8 CVSS, allows unauthenticated remote attackers to achieve high impact on confidentiality, integrity, and availability through a crafted regular expression. Despite its severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.26.3CPE matchmatch criteria
cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
18.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
6.06%
Probability of exploitation in next 30 days
EPSS Percentile
92.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0606 is in the 87th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (15)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-perl524-perl-4:5.24.0-381.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-perl526-perl-4:5.26.3-405.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-perl526-perl-Module-CoreList-1:5.20181130-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-perl524-perl-4:5.24.0-381.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: rh-perl526-perl-4:5.26.3-405.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: rh-perl526-perl-Module-CoreList-1:5.20181130-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: rh-perl524-perl-4:5.24.0-381.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: rh-perl526-perl-4:5.26.3-405.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: rh-perl526-perl-Module-CoreList-1:5.20181130-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: rh-perl524-perl-4:5.24.0-381.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-perl526-perl-4:5.26.3-405.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-perl526-perl-Module-CoreList-1:5.20181130-1.el7
View patch
redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-perl524-perl-4:5.24.0-381.el7
View patch

Vendor Advisories (1)

redhatCVE-2018-18314Moderate

perl: Heap-based buffer overflow in S_regatom()

Nov 29, 2018

References

access.redhat.com / errata/RHSA-2019:0001
Third Party Advisory
access.redhat.com / errata/RHSA-2019:0010
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
github.com / Perl/perl5/commit/19a498a461d7c81ae3507c450953d1148efecf4f
PatchThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/RWQGEB543QN7SSBRKYJM6PSOC3RLYGSM
metacpan.org / changes/release/SHAY/perl-5.26.3
Third Party Advisory
rt.perl.org / Ticket/Display.html
ExploitPatchThird Party Advisory
security.gentoo.org / glsa/201909-01
security.netapp.com / advisory/ntap-20190221-0003
PatchThird Party Advisory
usn.ubuntu.com / 3834-1
Third Party Advisory
debian.org / security/2018/dsa-4347
Third Party Advisory
oracle.com / security-alerts/cpujul2020.html
securityfocus.com / bid/106145
Third Party AdvisoryVDB Entry
securitytracker.com / id/1042181
Third Party AdvisoryVDB Entry