CVE & CISA-KEV Catalog

CVE-2020-12762

HIGHEPSS 77th pctl

7.8

CVSS v3

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.

CWE-190Integer Overflow CWE-787Out-of-bounds Write

How to fix

Remediation Available

json-cDebian

Fixed in:0.13.1+dfsg-8CVE-2020-12762

Fixed in:0.13.1+dfsg-8CVE-2020-12762

Fixed in:0.13.1+dfsg-8CVE-2020-12762

Fixed in:0.13.1+dfsg-8CVE-2020-12762

libfastjsonRocky

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

libfastjsonRed Hat / RHEL

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

libfastjson-debuginfoRed Hat / RHEL

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

libfastjson-debuginfoRocky

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

libfastjson-debugsourceRed Hat / RHEL

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

libfastjson-debugsourceRocky

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_6.1RHSA-2024:0411

Fixed in:0:0.99.9-1.el8_8.1RHSA-2024:0573

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-2.el8RHSA-2023:6976

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_2.1RHSA-2024:1086

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

Fixed in:0:0.99.9-3.el9_0.1RHSA-2024:1154

libfastjson-develRocky

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

libfastjson-develRed Hat / RHEL

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

Fixed in:0:0.99.9-5.el9RHSA-2023:6431

json-cUbuntu

Fixed in:0.11-3ubuntu1.2+esm3USN-4360-4

Fixed in:0.11-3ubuntu1.2+esm1USN-4360-1

Fixed in:0.11-4ubuntu2.1USN-4360-1

Fixed in:0.11-4ubuntu2.6USN-4360-4

Fixed in:0.12.1-1.3ubuntu0.1USN-4360-1

Fixed in:0.12.1-1.3ubuntu0.3USN-4360-4

Fixed in:0.13.1+dfsg-7ubuntu0.3USN-4360-4

Fixed in:0.13.1+dfsg-7ubuntu0.1USN-4360-1

libjson-c2Ubuntu

Fixed in:0.11-3ubuntu1.2+esm1USN-4360-1

Fixed in:0.11-3ubuntu1.2+esm3USN-4360-4

Fixed in:0.11-4ubuntu2.1USN-4360-1

Fixed in:0.11-4ubuntu2.6USN-4360-4

libjson-c3Ubuntu

Fixed in:0.12.1-1.3ubuntu0.3USN-4360-4

Fixed in:0.12.1-1.3ubuntu0.1USN-4360-1

libjson-c4Ubuntu

Fixed in:0.13.1+dfsg-7ubuntu0.1USN-4360-1

Fixed in:0.13.1+dfsg-7ubuntu0.3USN-4360-4

libjson0Ubuntu

Fixed in:0.11-3ubuntu1.2+esm3USN-4360-4

Fixed in:0.11-3ubuntu1.2+esm1USN-4360-1

Fixed in:0.11-4ubuntu2.1USN-4360-1

Fixed in:0.11-4ubuntu2.6USN-4360-4

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

1.89%probability of exploitation in 30 days

77thpercentile

Elevated risk: more likely to be exploited than 77% of all known CVEs.

References

Patch1

github.com

Exploit1

github.com

Third-Party Advisory10

Other references4

Related Vulnerabilities

Other CWE-190 (Integer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix
CVE-2019-11477	High	7.5	99%	-	Fix
CVE-2023-44443	High	7.8	94%	-	Fix
CVE-2014-0569	High	9.3	90%	-	-
CVE-2017-3599	High	7.5	90%	-	Fix
CVE-2023-21716	Critical	9.8	82%	-	Fix

Embed a live status badge for CVE-2020-12762

Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.