Is CVE-2018-6797 being actively exploited?

CVE-2018-6797 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2018-6797?

CVE-2018-6797 has a CVSS 3.0 base score of 9.8 (CRITICAL).

CVE-2018-6797

CRITICAL · CVSS 9.8EPSS 6.5%EU EUVD

An issue was discovered in Perl 5.18 through 5.26. A crafted regular expression can cause a heap-based buffer overflow, with control over the bytes written.

Key facts

CVSS score: 9.8 (v3.0)
Severity: CRITICAL
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-787
EPSS score: 6.5% (94th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2018-18544)
Published: April 17, 2018
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2018-18544 in the EU Vulnerability Database. Last updated in EUVD on August 5, 2024.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
debian / debian linux
debian / debian linux
perl / perl
redhat / enterprise linux server
redhat / enterprise linux server
redhat / enterprise linux server
redhat / enterprise linux server
redhat / enterprise linux server
redhat / enterprise linux workstation
redhat / enterprise linux workstation

Certified products that may be affected

2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Red Hat Enterprise Linux 7 OpenSSH Server Cryptographic Module - Red Hat®, Inc. - FIPS 140 3891 - historical
Red Hat Enterprise Linux 7.6 - Red Hat, Inc. - Common Criteria CCEVS-VR-VID-11039-2020 - archived

References

http://www.securitytracker.com/id/1040681(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1042004(Third Party Advisory, VDB Entry)
https://access.redhat.com/errata/RHSA-2018:1192(Third Party Advisory)
https://rt.perl.org/Public/Bug/Display.html?id=132227(Patch, Vendor Advisory)
https://security.gentoo.org/glsa/201909-01
https://usn.ubuntu.com/3625-1/(Third Party Advisory)
https://www.debian.org/security/2018/dsa-4172(Third Party Advisory)
https://www.oracle.com/security-alerts/cpujul2020.html

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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