Vulnerability Description
Cpanel::JSON::XS before version 4.40 for Perl has an integer buffer overflow causing a segfault when parsing crafted JSON, enabling denial-of-service attacks or other unspecified impact
CVSS Score
5.6
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Related Weaknesses (CWE)
References
- https://github.com/rurban/Cpanel-JSON-XS/commit/378236219eaa35742c3962ecbdee3649
- 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
- http://www.openwall.com/lists/oss-security/2025/09/08/1
- https://lists.debian.org/debian-lts-announce/2025/09/msg00034.html
FAQ
What is CVE-2025-40929?
CVE-2025-40929 is a vulnerability with a CVSS score of 5.6 (MEDIUM). Cpanel::JSON::XS before version 4.40 for Perl has an integer buffer overflow causing a segfault when parsing crafted JSON, enabling denial-of-service attacks or other unspecified impact
How severe is CVE-2025-40929?
CVE-2025-40929 has been rated MEDIUM with a CVSS base score of 5.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-40929?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.