CVE-2018-6798
Matching a crafted locale dependent regular expression can cause a heap-based buffer over-read and potentially information disclosure.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.93%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in Perl 5.22 through 5.26. Matching a crafted locale dependent regular expression can cause a heap-based buffer over-read and potentially information disclosure.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 3.93% probability · 90th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- debian/debian linux · perl/perl · canonical/ubuntu linux · redhat/enterprise linux server · redhat/enterprise linux workstation
- Source
- cve@mitre.org
EPSS 3.9% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securitytracker.com/id/1040681Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:1192Third Party Advisory
- https://rt.perl.org/Public/Bug/Display.html?id=132063Vendor Advisory
- https://security.gentoo.org/glsa/201909-01
- https://usn.ubuntu.com/3625-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4172Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2020.html
- http://www.securitytracker.com/id/1040681Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:1192Third Party Advisory
- https://rt.perl.org/Public/Bug/Display.html?id=132063Vendor Advisory
- https://security.gentoo.org/glsa/201909-01
- https://usn.ubuntu.com/3625-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4172Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2020.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.