5.9

CVE-2022-31117: fedoraproject fedora Double Free

CVSS: 5.9v3.1MediumModified
AliasesGHSA-fm67-cv37-96ffPYSEC-2026-1056UBUNTU-CVE-2022-31117
Published 05-07-2022Last modified 23-04-2025
Open JSON

Vulnerability summary

CVE-2022-31117 is a medium (CVSS 5.9) Double Free vulnerability in fedoraproject fedora. EPSS estimates a 1.88% chance of exploitation in the next 30 days, higher than 79% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
5.9/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.88%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 4
MGASA-2022-0270OPENSUSE-SU-2025:15107-1RHSA-2022:8850RHSA-2022:8864SUSE-SU-2022:2673-1USN-6629-1

Timeline

  1. 05-07-2022
    PublishedVulnerability first disclosed.
  2. 23-04-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

1.88%

Chance of exploitation in the next 30 days

Percentile

79%

Versus all other CVEs

30-day change

+0.05 pp

From 1.82% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.88%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu3 products
  • collada2gltfAll versions (No fix recorded)
  • pandasAll versions (No fix recorded)
  • ujson< 1.33-1ubuntu0.1~esm2 | < 1.35-2ubuntu0.1~esm1 | < 5.1.0-1ubuntu0.1~esm1
Debian1 product
  • ujson< 5.4.0-1
Fedoraproject1 product
PyPI1 product
  • ujson< 5.4.0
Ultrajson1 product
Ultrajson_project1 product

6 vendors · 8 products

References

15 links
Show all 15 references