Integer overflow in Cpanel-JSON-XS - CVE-2025-40929

Vulnerability identifier: #VU115218

CSH Severity: High

CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-40929

CWE-ID: CWE-190

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow. A remote attacker can pass specially crafted JSON data to the application, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Cpanel-JSON-XS
Debian Linux
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
Fedora
SUSE Package Hub 15
Ubuntu
Anolis OS
openEuler
libcpanel-json-xs-perl (Ubuntu package)
libcpanel-json-xs-perl (Debian package)
perl-Cpanel-JSON-XS-help
perl-Cpanel-JSON-XS-debugsource
perl-Cpanel-JSON-XS-debuginfo
perl-Cpanel-JSON-XS
perl-Cpanel-JSON-XS-doc

Install updates from vendor's website.

Cpanel-JSON-XS - update to 4.40
libcpanel-json-xs-perl (Ubuntu package) - addressed in versions 4.27-1ubuntu0.2, 4.37-1ubuntu0.1, 4.39-1ubuntu0.1
libcpanel-json-xs-perl (Debian package) - addressed in versions 4.35-1+deb12u1, 4.39-2~deb13u1
perl-Cpanel-JSON-XS-help - update to 4.37-2
perl-Cpanel-JSON-XS-debugsource - update to 4.37-2
perl-Cpanel-JSON-XS-debuginfo - update to 4.37-2
perl-Cpanel-JSON-XS - update to 4.37-2
perl-Cpanel-JSON-XS - update to 4.40-1
perl-Cpanel-JSON-XS-doc - update to 4.40-1
perl-Cpanel-JSON-XS - addressed in versions 4.40-1.el8, 4.40-1.el9, 4.40-1.el10_0, 4.40-1.el10_1, 4.40-1.el10_2, 4.40-1.fc41, 4.40-1.fc42, 4.40-1.fc43
perl-Cpanel-JSON-XS - update to 4.380.0-150700.3.3.1
perl-Cpanel-JSON-XS-debuginfo - update to 4.380.0-150700.3.3.1
perl-Cpanel-JSON-XS-debugsource - update to 4.380.0-150700.3.3.1

• https://github.com/rurban/Cpanel-JSON-XS/commit/378236219eaa35742c3962ecbdee364903b0a1f2.patch
• https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.39/source/XS.xs#L713
• https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.40/changes

• Integer overflow in Cpanel::JSON::XS
• Debian update for libcpanel-json-xs-perl
• Fedora 41 update for perl-Cpanel-JSON-XS
• Fedora 42 update for perl-Cpanel-JSON-XS
• Fedora 43 update for perl-Cpanel-JSON-XS
• Fedora EPEL 10.1 update for perl-Cpanel-JSON-XS
• Fedora EPEL 10.2 update for perl-Cpanel-JSON-XS
• Fedora EPEL 10.0 update for perl-Cpanel-JSON-XS
• Fedora EPEL 9 update for perl-Cpanel-JSON-XS
• Fedora EPEL 8 update for perl-Cpanel-JSON-XS
• openEuler 24.03 LTS SP2 update for perl-Cpanel-JSON-XS
• openEuler 24.03 LTS SP1 update for perl-Cpanel-JSON-XS
• SUSE update for perl-Cpanel-JSON-XS
• Ubuntu update for libcpanel-json-xs-perl
• Anolis OS update for perl-Cpanel-JSON-XS