CVE-2018-18311

CRITICALNVD 9.89.8—

9.8

Perl before 5.26.3 and 5.28.x before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 94.2%
KEV: Not listed

Published

December 7, 2018

Last Modified

November 21, 2024

References (56)

cve@mitrehttp://seclists.org/fulldisclosure/2019/Mar/49
cve@mitrehttp://www.securityfocus.com/bid/106145
cve@mitrehttp://www.securitytracker.com/id/1042181
cve@mitrehttps://access.redhat.com/errata/RHBA-2019:0327
cve@mitrehttps://access.redhat.com/errata/RHSA-2019:0001
cve@mitrehttps://access.redhat.com/errata/RHSA-2019:0010
cve@mitrehttps://access.redhat.com/errata/RHSA-2019:0109
cve@mitrehttps://access.redhat.com/errata/RHSA-2019:1790
cve@mitrehttps://access.redhat.com/errata/RHSA-2019:1942
cve@mitrehttps://access.redhat.com/errata/RHSA-2019:2400
cve@mitrehttps://bugzilla.redhat.com/show_bug.cgi?id=1646730
cve@mitrehttps://github.com/Perl/perl5/commit/34716e2a6ee2af96078d62b065b7785c001194be
cve@mitrehttps://kc.mcafee.com/corporate/index?page=content&id=SB10278
cve@mitrehttps://lists.debian.org/debian-lts-announce/2018/11/msg00039.html
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWQGEB543QN7SSBRKYJM6PSOC3RLYGSM/

Patch Availability(9)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	perl-modules-5.22 (5.22.1-9ubuntu0.6) @ xenial	2026-05-28	ubuntu
ubuntu	perl (5.14.2-6ubuntu2.9) @ precise	2026-05-28	ubuntu
redhat	perl-main-1.03-524.1.hum1	2026-04-10	redhat
redhat	perl-4:5.16.3-291.el7_3.1	2019-08-07	redhat
redhat	perl-4:5.16.3-292.el7_4.1	2019-07-30	redhat
redhat	perl-4:5.16.3-292.el7_5.1	2019-07-16	redhat
redhat	perl-4:5.16.3-294.el7_6	2019-01-21	redhat
redhat	rh-perl524-perl-4:5.24.0-381.el7	2019-01-02	redhat
redhat	rh-perl526-perl-Module-CoreList-1:5.20181130-1.el7	2019-01-02	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(9)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 9× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 00:30 UTCEG score recompute
2026-05-28 00:30 UTCVendor advisory
2026-05-28 00:30 UTCGHSA enrichment
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 12:13 UTCOSV refresh
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2018-18311?

CVE-2018-18311 is a critical vulnerability published on December 7, 2018. Perl before 5.26.3 and 5.28.x before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.

When was CVE-2018-18311 disclosed?

CVE-2018-18311 was first published in the National Vulnerability Database on December 7, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-18311 actively exploited?

CVE-2018-18311 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 94.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-18311?

CVE-2018-18311 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2018-18311?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-18311, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2018-18311

Published

Last Modified

References (56)

Patch Availability(9)

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-18311?

Same vendor

Same CWE

CVE-2018-18311

📅 Published

🔄 Last Modified

🔗 References (56)

Patch Availability(9)

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-18311?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

References (56)

Frequently asked(5)

Related CVEs(same vendor + same CWE)