High severity7.8NVD Advisory· Published May 9, 2020· Updated Jun 17, 2026
CVE-2020-12762
CVE-2020-12762
Description
json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
50- json-c/json-cdescription
- osv-coords48 versionspkg:rpm/almalinux/json-c-develpkg:rpm/almalinux/json-c-docpkg:rpm/almalinux/libfastjsonpkg:rpm/almalinux/libfastjson-develpkg:rpm/opensuse/json-c&distro=openSUSE%20Leap%2015.3pkg:rpm/opensuse/libfastjson&distro=openSUSE%20Leap%2015.4pkg:rpm/suse/json-c&distro=SUSE%20Enterprise%20Storage%206pkg:rpm/suse/json-c&distro=SUSE%20Enterprise%20Storage%207pkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOSpkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSSpkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-ESPOSpkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Micro%205.0pkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Micro%205.1pkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3pkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2015%20SP2pkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCLpkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-BCLpkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/json-c&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/json-c&distro=SUSE%20Manager%20Proxy%204.1pkg:rpm/suse/json-c&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.1pkg:rpm/suse/json-c&distro=SUSE%20Manager%20Server%204.1pkg:rpm/suse/json-c&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/json-c&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209pkg:rpm/suse/libfastjson&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/libfastjson&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSSpkg:rpm/suse/libfastjson&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/libfastjson&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP4pkg:rpm/suse/libfastjson&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/libfastjson&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSSpkg:rpm/suse/libfastjson&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/libfastjson&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/libfastjson&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2pkg:rpm/suse/libfastjson&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3
< 0.13.1-2.el8+ 47 more
- (no CPE)range: < 0.13.1-2.el8
- (no CPE)range: < 0.13.1-2.el8
- (no CPE)range: < 0.99.9-5.el9
- (no CPE)range: < 0.99.9-5.el9
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.99.9-150400.3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.12.1-4.3.1
- (no CPE)range: < 0.12.1-4.3.1
- (no CPE)range: < 0.12.1-4.3.1
- (no CPE)range: < 0.12.1-4.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.12.1-4.3.1
- (no CPE)range: < 0.12.1-4.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.12.1-4.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.13-3.3.1
- (no CPE)range: < 0.12.1-4.3.1
- (no CPE)range: < 0.12.1-4.3.1
- (no CPE)range: < 0.99.8-150000.3.3.1
- (no CPE)range: < 0.99.8-150000.3.3.1
- (no CPE)range: < 0.99.8-150000.3.3.1
- (no CPE)range: < 0.99.9-150400.3.3.1
- (no CPE)range: < 0.99.8-3.6.1
- (no CPE)range: < 0.99.8-150000.3.3.1
- (no CPE)range: < 0.99.8-150000.3.3.1
- (no CPE)range: < 0.99.8-3.6.1
- (no CPE)range: < 0.99.8-150000.3.3.1
- (no CPE)range: < 0.99.8-150000.3.3.1
Patches
Vulnerability mechanics
References
16- github.com/json-c/json-c/pull/592nvdExploitPatchThird Party Advisory
- github.com/rsyslog/libfastjson/issues/161nvdExploitThird Party Advisory
- cert-portal.siemens.com/productcert/pdf/ssa-637483.pdfnvdThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/05/msg00032.htmlnvdMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/05/msg00034.htmlnvdMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/07/msg00031.htmlnvdMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2023/06/msg00023.htmlnvdThird Party Advisory
- security.gentoo.org/glsa/202006-13nvdThird Party Advisory
- security.netapp.com/advisory/ntap-20210521-0001/nvdThird Party Advisory
- usn.ubuntu.com/4360-1/nvdThird Party Advisory
- usn.ubuntu.com/4360-4/nvdThird Party Advisory
- www.debian.org/security/2020/dsa-4741nvdThird Party Advisory
- lists.debian.org/debian-lts-announce/2025/07/msg00021.htmlnvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBR36IXYBHITAZFB5PFBJTED22WO5ONB/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CQQRRGBQCAWNCCJ2HN3W5SSCZ4QGMXQI/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W226TSCJBEOXDUFVKNWNH7ETG7AR6MCS/nvd
News mentions
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