What’s Vulnerable › Vulnerabilities

CVE-2023-47038: Perl: write past buffer end via illegal user-defined unicode property

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-12-18 · updated 2026-06-17
• Weakness: CWE-122

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 products

• Fedoraproject Fedora: 39
• perl: from 5.30.0 through 5.38.0
• Red Hat Enterprise Linux: 8.0, 9.0
• RedHat Enterprise Linux Aus: 9.4
• RedHat Enterprise Linux Eus: 9.4

References

• https://access.redhat.com/errata/RHSA-2024:2228
• https://access.redhat.com/errata/RHSA-2024:3128
• https://access.redhat.com/security/cve/CVE-2023-47038
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1056746
• https://bugzilla.redhat.com/show_bug.cgi?id=2249523
• https://access.redhat.com/errata/RHSA-2024:2228
• https://access.redhat.com/errata/RHSA-2024:3128
• https://access.redhat.com/security/cve/CVE-2023-47038
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1056746
• https://bugzilla.redhat.com/show_bug.cgi?id=2249523
• https://github.com/Perl/perl5/commit/12c313ce49b36160a7ca2e9b07ad5bd92ee4a010
• https://github.com/Perl/perl5/commit/7047915eef37fccd93e7cd985c29fe6be54650b6

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