Perl before 5.26.3 has a buffer overflow via a crafted regular expression that triggers invalid write operations.
Priority MEDIUM 51CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.
Summary
Perl before 5.26.3 has a buffer overflow via a crafted regular expression that triggers invalid write operations.
Why it matters now
EPSS 0.0606 93rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 3 advisories
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 15
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:* | before 5.26.3 | Vulnerable | Perl |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* | 18.10 | Vulnerable | Canonical |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:* | 11.0 – 11.40 | Vulnerable | NetApp |
| cpe:2.3:a:netapp:snap_creator_framework:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:snapdrive:-:*:*:*:*:unix:*:* | not specified by NVD | Vulnerable | NetApp |
- cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:* Versions before 5.26.3 Vulnerable ·Perl
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* Versions 18.10 Vulnerable ·Canonical
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:* Versions 11.0 – 11.40 Vulnerable ·NetApp
- cpe:2.3:a:netapp:snap_creator_framework:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:snapdrive:-:*:*:*:*:unix:*:* Versions not specified by NVD Vulnerable ·NetApp
Show 5 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:* | 7.4 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:* | 7.5 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:7.6:*:*:*:*:*:*:* | 7.6 | Vulnerable | Red Hat |
- cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
Remediation
Red Hat 3 advisories
- RHSA-2026:7604 Released 2026-04-10 · Red Hat rating ImportantRed Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images perl-5.42.2-524.1.hum1@aarch64, perl-5.42.2-524.1.hum1@src, perl-5.42.2-524.1.hum1@x86_64 +47
- RHSA-2019:0010 Released 2019-01-02 · Red Hat rating Importantrh-perl524-perl security update
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) rh-perl524-perl-4:5.24.0-381.el6, rh-perl524-perl-Attribute-Handlers-0.99-381.el6, rh-perl524-perl-Devel-Peek-1.23-381.el6 +26
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-perl524-perl-4:5.24.0-381.el7, rh-perl524-perl-Attribute-Handlers-0.99-381.el7, rh-perl524-perl-Devel-Peek-1.23-381.el7 +26
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) rh-perl524-perl-4:5.24.0-381.el7, rh-perl524-perl-Attribute-Handlers-0.99-381.el7, rh-perl524-perl-Devel-Peek-1.23-381.el7 +26
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-perl524-perl-4:5.24.0-381.el7, rh-perl524-perl-Attribute-Handlers-0.99-381.el7, rh-perl524-perl-Devel-Peek-1.23-381.el7 +26
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-perl524-perl-4:5.24.0-381.el7, rh-perl524-perl-Attribute-Handlers-0.99-381.el7, rh-perl524-perl-Devel-Peek-1.23-381.el7 +26
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) rh-perl524-perl-4:5.24.0-381.el6, rh-perl524-perl-Attribute-Handlers-0.99-381.el6, rh-perl524-perl-Devel-Peek-1.23-381.el6 +26
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-perl524-perl-4:5.24.0-381.el7, rh-perl524-perl-Attribute-Handlers-0.99-381.el7, rh-perl524-perl-Devel-Peek-1.23-381.el7 +26
- RHSA-2019:0001 Released 2019-01-02 · Red Hat rating Importantrh-perl526-perl security and enhancement update
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-perl526-perl-4:5.26.3-405.el7, rh-perl526-perl-Attribute-Handlers-0.99-405.el7, rh-perl526-perl-Devel-Peek-1.26-405.el7 +25
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) rh-perl526-perl-4:5.26.3-405.el7, rh-perl526-perl-Attribute-Handlers-0.99-405.el7, rh-perl526-perl-Devel-Peek-1.26-405.el7 +25
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-perl526-perl-4:5.26.3-405.el7, rh-perl526-perl-Attribute-Handlers-0.99-405.el7, rh-perl526-perl-Devel-Peek-1.26-405.el7 +25
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-perl526-perl-4:5.26.3-405.el7, rh-perl526-perl-Attribute-Handlers-0.99-405.el7, rh-perl526-perl-Devel-Peek-1.26-405.el7 +25
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-perl526-perl-4:5.26.3-405.el7, rh-perl526-perl-Attribute-Handlers-0.99-405.el7, rh-perl526-perl-Devel-Peek-1.26-405.el7 +25
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Hardened Images | Fixed | RHSA-2026:7604 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2019:0010 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2019:0001, RHSA-2019:0010 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) | Fixed | RHSA-2019:0001, RHSA-2019:0010 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) | Fixed | RHSA-2019:0001, RHSA-2019:0010 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) | Fixed | RHSA-2019:0001, RHSA-2019:0010 |
| Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2019:0010 |
| Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2019:0001, RHSA-2019:0010 |
Not affected: 5 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat OpenShift Enterprise 3
Timeline
- 2026-10-02 Threatist record created from CVE-2018-18314
- 2026-10-03 Alias added: GHSA-7f84-77mg-9mgg
References
Patch 3
Advisory 7
Sources
- CVE-2018-18314 · CVE Program
- CVE-2018-18314 · NVD
- FIRST EPSS
- GHSA-7f84-77mg-9mgg · GitHub Advisory Database · CC BY 4.0
- CVE-2018-18314 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences