CRITICAL

CVE-2018-18314

CVSS v3

9.8

CRITICAL

EPSS Score

6.1 %

exploit probability, as of 2026-10-19

CISA KEV

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-2018-18314 Red Hat Product Security674 products fixed
perl: Heap-based buffer overflow in S_regatom()
RHSA-2026:7604 Red Hat Product Security203 products fixed
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
RHSA-2019:0010 Red Hat Product Security217 products fixed
Red Hat Security Advisory: rh-perl524-perl security update
RHSA-2019:0001 Red Hat Product Security254 products fixed
Red Hat Security Advisory: rh-perl526-perl security and enhancement update

Full record on NVD

Description

Perl before 5.26.3 has a buffer overflow via a crafted regular expression that triggers invalid write operations.

Technical details

Published: 2018-12-07

Frequently asked questions

What is CVE-2018-18314?

Perl before 5.26.3 has a buffer overflow via a crafted regular expression that triggers invalid write operations.

Is CVE-2018-18314 actively exploited?

Active exploitation of CVE-2018-18314 has not been confirmed. Its EPSS score was 6.1% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-18314?

CVE-2018-18314 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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