CVE-2022-4996

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.63% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 50.3% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-08-21.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-08-19 23:45Z2 MO AGO

Last updated

2026-08-21 16:46Z2 MO AGO

Reserved

2026-08-17

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.9)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-1077Floating Point Comparison with Incorrect OperatorVariant

Data version

5.2

Document digest

3ee771c74114f82aa52c7f6fe7a5cb8fdfdcb8233b2cf8c1dec75f32bff79aa6

• vuldb.comVDB-391391 | mruby bigint.c udiv floating point comparison with incorrect operatorhttps://vuldb.com/vuln/391391vdb-entrytechnical-description
• vuldb.comVDB-391391 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/vuln/391391/ctisignaturepermissions-required
• vuldb.comCVE-2022-4996 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2022-4996third-party-advisory
• vuldb.comSubmit #877513 | mruby 3.1.0 Floating Point Exceptionhttps://vuldb.com/submit/877513third-party-advisory
• huntr.comhttps://huntr.com/bounties/5a5092df-1699-4497-a8b2-38318bce0c4eexploit