perl: Heap-based buffer overflow in S_regatom()
Published Dec 7, 2018
9.8
CRITICALCVSS 3.0
EPSS 6.06%
Description
Perl before 5.26.3 has a buffer overflow via a crafted regular expression that triggers invalid write operations.
Affected products
No data.
Configuration 2
- 14.04
- 16.04
- 18.04
- 18.10
Configuration 3
- 9.0
Configuration 4
- ≥ 11.0 · ≤ 11.40
- n/a
- n/a
- n/a
Configuration 5
- 6.0
- 7.0
- 7.4
- 7.5
- 7.6
No data.
Red Hat Hardened Images
perl-main-1.03-524.1.hum1
Fixed · RHSA-2026:7604
Red Hat Software Collections for Red Hat Enterprise Linux 6
rh-perl524-perl-4:5.24.0-381.el6
Fixed · RHSA-2019:0010
Red Hat Software Collections for Red Hat Enterprise Linux 7
rh-perl524-perl-4:5.24.0-381.el7
Fixed · RHSA-2019:0010
Red Hat Software Collections for Red Hat Enterprise Linux 7
rh-perl526-perl-4:5.26.3-405.el7
Fixed · RHSA-2019:0001
Red Hat Software Collections for Red Hat Enterprise Linux 7
rh-perl526-perl-Module-CoreList-1:5.20181130-1.el7
Fixed · RHSA-2019:0001
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS
rh-perl524-perl-4:5.24.0-381.el7
Fixed · RHSA-2019:0010
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS
rh-perl526-perl-4:5.26.3-405.el7
Fixed · RHSA-2019:0001
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS
rh-perl526-perl-Module-CoreList-1:5.20181130-1.el7
Fixed · RHSA-2019:0001
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
rh-perl524-perl-4:5.24.0-381.el7
Fixed · RHSA-2019:0010
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
rh-perl526-perl-4:5.26.3-405.el7
Fixed · RHSA-2019:0001
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
rh-perl526-perl-Module-CoreList-1:5.20181130-1.el7
Fixed · RHSA-2019:0001
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS
rh-perl524-perl-4:5.24.0-381.el7
Fixed · RHSA-2019:0010
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS
rh-perl526-perl-4:5.26.3-405.el7
Fixed · RHSA-2019:0001
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS
rh-perl526-perl-Module-CoreList-1:5.20181130-1.el7
Fixed · RHSA-2019:0001
Red Hat Enterprise Linux 5
perl
Not affected
Red Hat Enterprise Linux 6
perl
Not affected
Red Hat Enterprise Linux 7
perl
Not affected
Red Hat Enterprise Linux 8
perl
Not affected
Red Hat Enterprise Linux 8
perl:5.24/perl
Not affected
Red Hat OpenShift Enterprise 3
perl
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Hardened Images | perl-main-1.03-524.1.hum1 | Fixed | RHSA-2026:7604 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 | rh-perl524-perl-4:5.24.0-381.el6 | Fixed | RHSA-2019:0010 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | rh-perl524-perl-4:5.24.0-381.el7 | Fixed | RHSA-2019:0010 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | rh-perl526-perl-4:5.26.3-405.el7 | Fixed | RHSA-2019:0001 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | rh-perl526-perl-Module-CoreList-1:5.20181130-1.el7 | Fixed | RHSA-2019:0001 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS | rh-perl524-perl-4:5.24.0-381.el7 | Fixed | RHSA-2019:0010 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS | rh-perl526-perl-4:5.26.3-405.el7 | Fixed | RHSA-2019:0001 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS | rh-perl526-perl-Module-CoreList-1:5.20181130-1.el7 | Fixed | RHSA-2019:0001 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS | rh-perl524-perl-4:5.24.0-381.el7 | Fixed | RHSA-2019:0010 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS | rh-perl526-perl-4:5.26.3-405.el7 | Fixed | RHSA-2019:0001 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS | rh-perl526-perl-Module-CoreList-1:5.20181130-1.el7 | Fixed | RHSA-2019:0001 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS | rh-perl524-perl-4:5.24.0-381.el7 | Fixed | RHSA-2019:0010 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS | rh-perl526-perl-4:5.26.3-405.el7 | Fixed | RHSA-2019:0001 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS | rh-perl526-perl-Module-CoreList-1:5.20181130-1.el7 | Fixed | RHSA-2019:0001 |
| Red Hat Enterprise Linux 5 | perl | Not affected | n/a |
| Red Hat Enterprise Linux 6 | perl | Not affected | n/a |
| Red Hat Enterprise Linux 7 | perl | Not affected | n/a |
| Red Hat Enterprise Linux 8 | perl | Not affected | n/a |
| Red Hat Enterprise Linux 8 | perl:5.24/perl | Not affected | n/a |
| Red Hat OpenShift Enterprise 3 | perl | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (20 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 6.06% (0.06060) | 93.16th | v5 (v2026.06.15) |
| Jun 15, 2026 | 6.06% (0.06060) | 92.43th | v5 (v2026.06.15) |
| Nov 21, 2025 | 4.40% (0.04395) | 88.50th | v4 (v2025.03.14) |
| Nov 18, 2025 | 11.65% (0.11650) | 92.97th | v4 (v2025.03.14) |
| Oct 27, 2025 | 3.44% (0.03439) | 87.01th | v4 (v2025.03.14) |
| Jul 30, 2025 | 5.24% (0.05238) | 89.57th | v4 (v2025.03.14) |
| Mar 30, 2025 | 7.24% (0.07241) | 90.77th | v4 (v2025.03.14) |
| Mar 29, 2025 | 17.78% (0.17776) | 91.95th | v4 (v2025.03.14) |
| Mar 17, 2025 | 7.24% (0.07241) | 90.97th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.47% (0.01467) | 87.27th | v3 (v2023.03.01) |
| Apr 29, 2024 | 1.47% (0.01467) | 86.55th | v3 (v2023.03.01) |
| Dec 1, 2023 | 2.02% (0.02016) | 87.59th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.75% (0.01751) | 85.98th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.08% (0.03080) | 65.20th | v1 |
| Jan 6, 2022 | 3.08% (0.03080) | 64.86th | v1 |
| Sep 1, 2021 | 3.08% (0.03080) | 81.27th | v1 |
| Apr 14, 2021 | 3.08% (0.03080) | 0.00th | v1 |
References (17)
- http://www.securityfocus.com/bid/106145 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1042181 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2019:0001 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0010 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-18314 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1646751 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://github.com/Perl/perl5/commit/19a498a461d7c81ae3507c450953d1148efecf4f x_refsource_CONFIRMPatchThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWQGEB543QN7SSBRKYJM6PSOC3RLYGSM/ vendor-advisoryx_refsource_FEDORA
- https://metacpan.org/changes/release/SHAY/perl-5.26.3 x_refsource_CONFIRMThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-18314
- https://rt.perl.org/Ticket/Display.html?id=131649 x_refsource_CONFIRMExploitPatchThird Party Advisory
- https://security.gentoo.org/glsa/201909-01 vendor-advisoryx_refsource_GENTOO
- https://security.netapp.com/advisory/ntap-20190221-0003/ x_refsource_CONFIRMPatchThird Party Advisory
- https://usn.ubuntu.com/3834-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-18314
- https://www.debian.org/security/2018/dsa-4347 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.oracle.com/security-alerts/cpujul2020.html x_refsource_MISC
Change history (0)
No recorded changes yet.