Description
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
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| MLEHMANN | JSON::XS | < 4.04 | 4.04 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libjson-xs-perl | 4.030-3 | — |
| Debian 13 | libjson-xs-perl | 4.040-1~deb13u1 | DSA-5999-1 |
| Debian 12 | libjson-xs-perl | 4.040-1~deb12u1 | DSA-5999-1 |
| Debian 11 | libjson-xs-perl | 4.030-1+deb11u1 | DLA-4317-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libjson-xs-perl | 4.040-1 | — |
| Ubuntu 26.04 LTS | libjson-xs-perl | 4.040-1 | — |
| Ubuntu 25.10 | libjson-xs-perl | 4.040-1 | — |
| Ubuntu 24.04 LTS | libjson-xs-perl | 4.040-0ubuntu0.24.04.1 | USN-7750-1 |
| Ubuntu 22.04 LTS | libjson-xs-perl | 4.040-0ubuntu0.22.04.1 | USN-7750-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | libjson-xs-perl | No fix yet | — |
| Ubuntu 18.04 LTS | libjson-xs-perl | No fix yet | — |
| Ubuntu 16.04 LTS | libjson-xs-perl | No fix yet | — |
| Ubuntu 14.04 LTS | libjson-xs-perl | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | perl-JSON-XS | 1:4.04-1.el10_0 | RHSA-2025:17119 |
| RHEL 9 | perl-JSON-XS | 1:4.04-1.el9_6 | RHSA-2025:17162 |
| RHEL 8 | perl-JSON-XS | 1:3.04-4.el8_10 | RHSA-2025:17163 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.4 EUS | perl-JSON-XS | 1:4.03-5.el9_4.1 | RHSA-2025:17430 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | perl-JSON-XS | 1:4.04-1.el10_0 | ALSA-2025:17119 |
| AlmaLinux 9 | perl-JSON-XS | 1:4.04-1.el9_6 | ALSA-2025:17162 |
| AlmaLinux 8 | perl-JSON-XS | 1:3.04-4.el8_10 | ALSA-2025:17163 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | perl-JSON-XS | 1:4.04-1.el10_0 | RLSA-2025:17119 |
| Rocky Linux 9 | perl-JSON-XS | 1:4.04-1.el9_6 | RLSA-2025:17162 |
| Rocky Linux 8 | perl-JSON-XS | 1:3.04-4.el8_10 | RLSA-2025:17163 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | perl-JSON-XS | 4.40.0-1.1 | openSUSE-SU-2025:15535-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | perl-JSON-XS +1 | 1:4.03-3.amzn2023.0.3 | ALAS2023-2025-1200 |
| Amazon Linux 2 | perl-JSON-XS | 1:3.01-2.amzn2.0.1 | ALAS2-2025-3005 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | perl-JSON-XS | 4.04-1 | — |
| Azure Linux 2 (CBL-Mariner) | perl-JSON-XS | 4.04-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | perl-JSON-XS | 1:4.04-1.el10_0 | ELSA-2025-17119 |
| Oracle Linux 9 | perl-JSON-XS | 1:4.04-1.el9_6 | ELSA-2025-17162 |
| Oracle Linux 8 | perl-JSON-XS | 1:3.04-4.el8_10 | ELSA-2025-17163 |
Advisories 20
- ALSA-2025:17119 Moderate: perl-JSON-XS security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:17162 Moderate: perl-JSON-XS security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:17163 Moderate: perl-JSON-XS security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2025:17430 Red Hat Security Advisory: perl-JSON-XS security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:17162 Red Hat Security Advisory: perl-JSON-XS security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:17163 Red Hat Security Advisory: perl-JSON-XS security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:17119 Red Hat Security Advisory: perl-JSON-XS security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- USN-7750-1 libjson-xs-perl vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- openSUSE-SU-2025:15535-1 perl-JSON-XS-4.40.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- DSA-5999-1 libjson-xs-perl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- WID-SEC-2025-2171 Red Hat Enterprise Linux (JSON-XS Perl): Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Nov 12, 2025
- RLSA-2025:17162 Moderate: perl-JSON-XS security update Rocky Linux Security Advisories · Oct 10, 2025
- RLSA-2025:17163 Moderate: perl-JSON-XS security update Rocky Linux Security Advisories · Oct 8, 2025
- RLSA-2025:17119 Moderate: perl-JSON-XS security update Rocky Linux Security Advisories · Oct 8, 2025
- ELSA-2025-17162 Moderate: perl-JSON-XS security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 1, 2025
- ELSA-2025-17163 Moderate: perl-JSON-XS security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 1, 2025
- DLA-4317-1 libjson-xs-perl - security update Debian Security (DSA / DLA) · Sep 30, 2025
- ELSA-2025-17119 Moderate: perl-JSON-XS security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Sep 30, 2025
- ALAS2-2025-3005 Moderate: perl-JSON-XS security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Sep 29, 2025
- ALAS2023-2025-1200 Moderate: perl-JSON-XS security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Sep 29, 2025