CVE-2020-12762
HIGH 7.8EPSS 1.9%
json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend.
- CVSS v3.1 NVD
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS v2.0 NVD
- 6.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P - EPSS
- 1.90% chance of exploitation in the next 30 days, 79th percentile
- Published
- 2020-05-09
- Updated
- 2026-10-14
Proof-of-concept exploits (2)
- json-c/json-c/pull/5923297★ · 2026-10-04
- rsyslog/libfastjson/issues/16161★ · 2026-09-09
Security advisories
- https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf
- https://lists.debian.org/debian-lts-announce/2020/05/msg00032.html
- https://lists.debian.org/debian-lts-announce/2020/05/msg00034.html
- https://lists.debian.org/debian-lts-announce/2020/07/msg00031.html
- https://lists.debian.org/debian-lts-announce/2023/06/msg00023.html
- https://security.gentoo.org/glsa/202006-13
- https://security.netapp.com/advisory/ntap-20210521-0001
- https://usn.ubuntu.com/4360-1
- https://usn.ubuntu.com/4360-4
- https://www.debian.org/security/2020/dsa-4741