json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/json-c/json-c/pull/592 Exploit, Patch, Third Party Advisory
- https://github.com/json-c/json-c/pull/592 Exploit, Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.8 · json-c, fedoraproject, debianNVD modified 2026-10-14 10:17
Affected (CPE criteria) 16
cpe:2.3:a:json-c:json-c:*:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*cpe:2.3:a:siemens:sinec_ins:-:*:*:*:*:*:*:*cpe:2.3:a:siemens:sinec_ins:1.0:-:*:*:*:*:*:*cpe:2.3:a:siemens:sinec_ins:1.0:sp1:*:*:*:*:*:*
References 35
- https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf Third Party Advisory
- https://github.com/json-c/json-c/pull/592 Exploit, Patch, Third Party Advisory
- https://github.com/rsyslog/libfastjson/issues/161 Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/05/msg00032.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/05/msg00034.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00031.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/06/msg00023.html Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBR36IXYBHITAZFB5PFBJTED22WO5ONB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CQQRRGBQCAWNCCJ2HN3W5SSCZ4QGMXQI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W226TSCJBEOXDUFVKNWNH7ETG7AR6MCS/
- https://security.gentoo.org/glsa/202006-13 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210521-0001/ Third Party Advisory
- https://usn.ubuntu.com/4360-1/ Third Party Advisory
- https://usn.ubuntu.com/4360-4/ Third Party Advisory
- https://www.debian.org/security/2020/dsa-4741 Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf Third Party Advisory
- https://github.com/json-c/json-c/pull/592 Exploit, Patch, Third Party Advisory
- https://github.com/rsyslog/libfastjson/issues/161 Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/05/msg00032.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/05/msg00034.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00031.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/06/msg00023.html Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/07/msg00021.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBR36IXYBHITAZFB5PFBJTED22WO5ONB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CQQRRGBQCAWNCCJ2HN3W5SSCZ4QGMXQI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W226TSCJBEOXDUFVKNWNH7ETG7AR6MCS/
- https://security.gentoo.org/glsa/202006-13 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210521-0001/ Third Party Advisory
- https://usn.ubuntu.com/4360-1/ Third Party Advisory
- https://usn.ubuntu.com/4360-4/ Third Party Advisory
- https://www.debian.org/security/2020/dsa-4741 Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-202008.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-637483.html
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html