CVE-2022-31117

Double free of buffer during string decoding in ujson

Published Jul 5, 2022 CVSS 3.1 · 5.9 Medium EPSS 1.9% KEV · Not listed
Description
UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. In versions prior to 5.4.0 an error occurring while reallocating a buffer for string decoding can cause the buffer to get freed twice. Due to how UltraJSON uses the internal decoder, this double free is impossible to trigger from Python. This issue has been resolved in version 5.4.0 and all users should upgrade to UltraJSON 5.4.0. There are no known workarounds for this issue.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2022-6334 UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. In versions prior to 5.4.0 an error occurring while reallocating a buffer for string decoding can cause the buffer to get freed twice. Due to how UltraJSON uses the internal decoder, this double free is impossible to trigger from Python. This issue has been resolved in version 5.4.0 and all users should upgrade to UltraJSON 5.4.0. There are no known workarounds for this issue.
Github GHSA Github GHSA GHSA-fm67-cv37-96ff Potential double free of buffer during string decoding
Ubuntu USN Ubuntu USN USN-6629-1 UltraJSON vulnerabilities
Ubuntu USN Ubuntu USN USN-6629-3 UltraJSON vulnerabilities
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Apr 23, 2025, 6:05 PM
Reserved
May 18, 2022, 12:00 AM
Status
Modified
Published
Jul 5, 2022, 6:15 PM
Modified
Jun 17, 2026, 4:44 AM
Severity
Moderate
Public date
Jul 2, 2022, 12:00 AM