CVE-2023-47038Perl: write past buffer end via illegal user-defined unicode property
- 7.0HighCVSS base score
- 0.81%Exploitation in 30 daysEPSS · top 42% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A vulnerability was found in perl 5.30.0 through 5.38.0. This issue occurs when a crafted regular expression is compiled by perl, which can allow an attacker controlled byte buffer overflow in a heap allocated buffer.
Timeline
ID reserved
By redhat
- 49 days later
· 49 days later
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.1 | High7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.81% · top 42% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.0.
Affected products
perl
- affected 5.30.0 – < 5.34.3
- affected 5.36.0 – < 5.36.3
- affected 5.38.0 – < 5.38.2
Red Hat · Red Hat Enterprise Linux 8
- unaffected 8100020240314121426.9fe1d287 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 4:5.32.1-481.el9 – < *
Red Hat · Red Hat Enterprise Linux 6
All versions: unaffected
Red Hat · Red Hat Enterprise Linux 7
All versions: unaffected
Red Hat · Red Hat Enterprise Linux 8
All versions: unaffected
Red Hat · Red Hat Enterprise Linux 8
All versions: affected
What to do
Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
References
References14
- RHSA-2024:2228 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:3128 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://access.redhat.com/security/cve/CVE-2023-47038 (opens in a new tab)vdb-entryx_refsource_REDHATx_transferred
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1056746 (opens in a new tab)x_transferred
- RHBZ#2249523 (opens in a new tab)issue-trackingx_refsource_REDHATx_transferred
- https://github.com/aquasecurity/trivy/discussions/8400 (opens in a new tab)
- https://www.suse.com/security/cve/CVE-2023-47100.html (opens in a new tab)
- https://ubuntu.com/security/CVE-2023-47100 (opens in a new tab)
- https://github.com/Perl/perl5/commit/ff1f9f59360afeebd6f75ca1502f5c3ebf077da3 (opens in a new tab)
- https://github.com/Perl/perl5/commit/7047915eef37fccd93e7cd985c29fe6be54650b6 (opens in a new tab)
- https://github.com/Perl/perl5/commit/12c313ce49b36160a7ca2e9b07ad5bd92ee4a010 (opens in a new tab)
- https://lists.fedoraproject.org/archives/list/[email protected]/message/GNEEWAACXQCEEAKSG7XX2D5YDRWLCIZJ/ (opens in a new tab)x_transferred
- https://perldoc.perl.org/perl5382delta#CVE-2023-47038-Write-past-buffer-end-via-illegal-user-defined-Unicode-property (opens in a new tab)x_transferred
- https://lists.fedoraproject.org/archives/list/[email protected]/message/UMDZZ4SCEW6FRWZDMXGAKZ35THTAWFG6/ (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2023-51193 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2023-47038)Record last updated .