# CVE-2025-40928: JSON::XS before version 4.04 for Perl has an integer buffer overflow causing a segfault when parsing crafted JSON, enabling denial-of-service attacks or other unspecified impact CVE-2025-40928 is fixed in 5 products on 1 platform, first by libjson-xs-perl 4.040-0ubuntu0.22.04.1, released September 8, 2025. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2025-40928 - Priority: High - CVSS: 7.5 (Important) - EPSS: 0.0067 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Sep 8, 2025 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-40928 ## Description JSON::XS before version 4.04 for Perl has an integer buffer overflowcausing a segfault when parsing crafted JSON, enabling denial-of-serviceattacks or other unspecified impact ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | libjson-xs-perl Debian 11.6 (bullseye) | 4.030-1+deb11u1 | [DLA-4317-1](https://patchblox.com/security/data/fix/linux/dla-4317-1.md) | Sep 30, 2025 | | Linux | libjson-xs-perl Debian 12.15 (bookworm) | 4.040-1~deb12u1 | [DSA-5999-1](https://patchblox.com/security/data/fix/linux/dsa-5999-1.md) | Sep 11, 2025 | | Linux | libjson-xs-perl Debian 13.5 (trixie) | 4.040-1~deb13u1 | [DSA-5999-1](https://patchblox.com/security/data/fix/linux/dsa-5999-1.md) | Sep 11, 2025 | | Linux | libjson-xs-perl Debian 14 | 4.030-3 | [DEBIAN-CVE-2025-40928](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40928.md) | Sep 8, 2025 | | Linux | libjson-xs-perl Ubuntu 22.04.1 LTS (jammy) | 4.040-0ubuntu0.22.04.1 | [libjson-xs-perl 4.040-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libjson-xs-perl-4.040-0ubuntu0.22.04.1.md) | Sep 8, 2025 | | Linux | libjson-xs-perl Ubuntu 24.04.5 LTS (noble) | 4.040-0ubuntu0.24.04.1 | [libjson-xs-perl 4.040-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libjson-xs-perl-4.040-0ubuntu0.24.04.1.md) | Sep 8, 2025 | | Linux | libjson-xs-perl Ubuntu 25.04 (plucky) | 4.040-0ubuntu0.25.04.1 | [libjson-xs-perl 4.040-0ubuntu0.25.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libjson-xs-perl-4.040-0ubuntu0.25.04.1.md) | Jan 16, 2026 | | Linux | libjson-xs-perl Ubuntu 25.10 (questing) | 4.040-1 | [libjson-xs-perl 4.040-1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libjson-xs-perl-4.040-1.md) | Sep 8, 2025 | | Linux | libjson-xs-perl Ubuntu 26.04.1 LTS (resolute) | 4.040-1 | [libjson-xs-perl 4.040-1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libjson-xs-perl-4.040-1.md) | Sep 8, 2025 | | Linux | perl-JSON-XS RHEL 10 | 4.04-1.el10_0 | [RHSA-2025:17119](https://patchblox.com/security/data/fix/linux/rhsa-2025-17119.md) | Sep 8, 2025 | | Linux | perl-JSON-XS RHEL 8 | 1:3.04-4.el8_10 | [RHSA-2025:17163](https://patchblox.com/security/data/fix/linux/rhsa-2025-17163.md) | Oct 1, 2025 | | Linux | perl-JSON-XS RHEL 9 | 1:4.04-1.el9_6 | [RHSA-2025:17162](https://patchblox.com/security/data/fix/linux/rhsa-2025-17162.md) | Oct 1, 2025 | | Linux | perl-JSON-XS almalinux 10 | 1:4.04-1.el10_0 | [ALSA-2025:17119](https://patchblox.com/security/data/fix/linux/alsa-2025-17119.md) | Sep 30, 2025 | | Linux | perl-JSON-XS almalinux 8 | 1:3.04-4.el8_10 | [ALSA-2025:17163](https://patchblox.com/security/data/fix/linux/alsa-2025-17163.md) | Oct 1, 2025 | | Linux | perl-JSON-XS almalinux 9 | 1:4.04-1.el9_6 | [ALSA-2025:17162](https://patchblox.com/security/data/fix/linux/alsa-2025-17162.md) | Oct 1, 2025 | | Linux | perl-JSON-XS amzn 2023 | 1:4.03-3.amzn2023.0.3 | [ALAS2023-2025-1200](https://patchblox.com/security/data/fix/linux/alas2023-2025-1200.md) | Sep 17, 2025 | | Linux | perl-JSON-XS ol 10 | 1:4.04-1.el10_0 | [ELSA-2025-17119](https://patchblox.com/security/data/fix/linux/elsa-2025-17119.md) | Sep 30, 2025 | | Linux | perl-JSON-XS ol 8 | 1:3.04-4.el8_10 | [ELSA-2025-17163](https://patchblox.com/security/data/fix/linux/elsa-2025-17163.md) | Oct 1, 2025 | | Linux | perl-JSON-XS ol 9 | 1:4.04-1.el9_6 | [ELSA-2025-17162](https://patchblox.com/security/data/fix/linux/elsa-2025-17162.md) | Oct 1, 2025 | | Linux | perl-JSON-XS rocky 10 | 1:4.04-1.el10_0 | [RLSA-2025:17119](https://patchblox.com/security/data/fix/linux/rlsa-2025-17119.md) | Oct 7, 2025 | | Linux | perl-JSON-XS rocky 8 | 1:3.04-4.el8_10 | [RLSA-2025:17163](https://patchblox.com/security/data/fix/linux/rlsa-2025-17163.md) | Oct 3, 2025 | | Linux | perl-JSON-XS rocky 9 | 1:4.04-1.el9_6 | [RLSA-2025:17162](https://patchblox.com/security/data/fix/linux/rlsa-2025-17162.md) | Oct 10, 2025 | | Linux | perl-JSON-XS-debuginfo amzn 2023 | 1:4.03-3.amzn2023.0.3 | [ALAS2023-2025-1200](https://patchblox.com/security/data/fix/linux/alas2023-2025-1200.md) | Sep 17, 2025 | | Linux | perl-JSON-XS-debugsource amzn 2023 | 1:4.03-3.amzn2023.0.3 | [ALAS2023-2025-1200](https://patchblox.com/security/data/fix/linux/alas2023-2025-1200.md) | Sep 17, 2025 | | Linux | perl-JSON-XS-tests amzn 2023 | 1:4.03-3.amzn2023.0.3 | [ALAS2023-2025-1200](https://patchblox.com/security/data/fix/linux/alas2023-2025-1200.md) | Sep 17, 2025 | --- Data as of 2026-11-08T00:53:09Z UTC. 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