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CVE-2023-47038

Perl: write past buffer end via illegal user-defined unicode property

HIGH
7.8
CVSS Score
Published: December 18, 2023 at 01:43 PM UTC
Updated: June 17, 2026 at 06:32 AM UTC
5 products affected across 3 vendorsFedoraEnterprise LinuxEnterprise Linux Eus

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Severity
HIGH7.8
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
39
Perl· Perlcpan
95%
5.30.0 ≤ v ≤ 5.38.0
Enterprise Linux· Red Hatrpm
95%
8.09.0
Vendor states this is fixed in 4:5.32.1-481.el9 (unaffected)
Vendor states this is fixed in 6 (unaffected)
Vendor states this is fixed in 7 (unaffected)
Vendor states this is fixed in 8100020240314121426.9fe1d287 (unaffected)
Enterprise Linux Aus· Red Hatrpm
95%
9.4
Enterprise Linux Eus· Red Hatrpm
95%
9.4

References (14)

Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2024:2228
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2024:3128
VDB Entryx_refsource_REDHATBroken LinkThird Party Advisory
Source: [email protected]
https://access.redhat.com/security/cve/CVE-2023-47038
Mailing ListPatch
Source: [email protected]
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1056746
Issue Trackingx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2249523
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/[email protected]/message/GNEEWAACXQCEEAKSG7XX2D5YDRWLCIZJ/
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://perldoc.perl.org/perl5382delta#CVE-2023-47038-Write-past-buffer-end-via-illegal-user-defined-Unicode-property
Source: af854a3a-2127-422b-91ae-364da2661108
https://github.com/Perl/perl5/commit/12c313ce49b36160a7ca2e9b07ad5bd92ee4a010

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-122CWE-787

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