CVE-2020-12762

json-c: JSON-C implements a reference counting object model that allows users to easily construct JavaScript Object Notation...

CVE-2020-12762 is fixed in 11 products on 1 platform, first by libjson-c3 0.12.1-1.3ubuntu0.3, released May 9, 2020. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
7.8
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0190
79th percentile

JSON-C implements a reference counting object model that allows users to easily construct JavaScript Object Notation (JSON) objects in C, output them as JSON formatted strings, and parse JSON formatted strings back into the C representation of JSON objects. Security Fix(es): * json-c: integer overflow and out-of-bounds write via a large JSON file (CVE-2020-12762) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.

Where it's fixed

ProductFixed inFixReleased
Linux
json-c · RHEL 8 0:0.13.1-2.el8 RHSA-2021:4382 Nov 9, 2021
json-c · amzn 2023 0.14-8.amzn2023.0.2 ALAS2023-2023-232 Jun 21, 2023
json-c · ol 8 0:0.13.1-2.el8 ELSA-2021-4382 Nov 16, 2021
json-c · rocky 8 0:0.13.1-2.el8 RLSA-2021:4382 Nov 9, 2021
json-c-debuginfo · amzn 2023 0.14-8.amzn2023.0.2 ALAS2023-2023-232 Jun 21, 2023
json-c-debugsource · amzn 2023 0.14-8.amzn2023.0.2 ALAS2023-2023-232 Jun 21, 2023
json-c-devel · RHEL 8 0:0.13.1-2.el8 RHSA-2021:4382 Nov 9, 2021
json-c-devel · almalinux 8 0.13.1-2.el8 ALSA-2021:4382 Nov 9, 2021
json-c-devel · amzn 2023 0.14-8.amzn2023.0.2 ALAS2023-2023-232 Jun 21, 2023
json-c-devel · ol 8 0:0.13.1-2.el8 ELSA-2021-4382 Nov 16, 2021
json-c-doc · RHEL 8 0:0.13.1-2.el8 RHSA-2021:4382 Nov 9, 2021
json-c-doc · almalinux 8 0.13.1-2.el8 ALSA-2021:4382 Nov 9, 2021
json-c-doc · amzn 2023 0.14-8.amzn2023.0.2 ALAS2023-2023-232 Jun 21, 2023
json-c-doc · ol 8 0:0.13.1-2.el8 ELSA-2021-4382 Nov 16, 2021
libfastjson · Debian 11.6 (bullseye) 0.99.9-1+deb11u1 DLA-4258-1 Jul 28, 2025
libfastjson · RHEL 8 0:0.99.9-2.el8 RHSA-2023:6976 Nov 14, 2023
libfastjson · RHEL 9 0:0.99.9-5.el9 RHSA-2023:6431 Nov 7, 2023
libfastjson · almalinux 8 0.99.9-2.el8 ALSA-2023:6976 Nov 14, 2023
libfastjson · almalinux 9 0.99.9-5.el9 ALSA-2023:6431 Nov 7, 2023
libfastjson · amzn 2023 0.99.9-1.amzn2023.0.3 ALAS2023-2023-205 Jun 5, 2023
libfastjson · ol 8 0:0.99.9-2.el8 ELSA-2023-6976 Nov 17, 2023
libfastjson · ol 9 0:0.99.9-5.el9 ELSA-2023-6431 Nov 11, 2023
libfastjson · rocky 8 0:0.99.9-2.el8 RLSA-2023:6976 Jun 27, 2026
libfastjson · rocky 9 0:0.99.9-5.el9 RLSA-2023:6431 Jun 25, 2026
libfastjson-debuginfo · amzn 2023 0.99.9-1.amzn2023.0.3 ALAS2023-2023-205 Jun 5, 2023
libfastjson-debugsource · amzn 2023 0.99.9-1.amzn2023.0.3 ALAS2023-2023-205 Jun 5, 2023
libfastjson-devel · RHEL 9 0:0.99.9-5.el9 RHSA-2023:6431 Nov 7, 2023
libfastjson-devel · almalinux 9 0.99.9-5.el9 ALSA-2023:6431 Nov 7, 2023
libfastjson-devel · amzn 2023 0.99.9-1.amzn2023.0.3 ALAS2023-2023-205 Jun 5, 2023
libfastjson-devel · ol 9 0:0.99.9-5.el9 ELSA-2023-6431 Nov 11, 2023
libjson-c3 · Ubuntu 18.04.6 LTS (bionic) 0.12.1-1.3ubuntu0.3 libjson-c3 0.12.1-1.3ubuntu0.3 May 9, 2020
libjson-c4 · Ubuntu 20.04 LTS (focal) 0.13.1+dfsg-7ubuntu0.3 libjson-c4 0.13.1+dfsg-7ubuntu0.3 May 9, 2020

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