Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2022-4996
n/a mruby — mruby bigint.c udiv floating point comparison with incorrect operator
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV
N L N N N N N L 5.5 .0064 48.7 —
AFFECTED
Product Versions Fixed
mruby 3.1.0 – —
TIMELINE
Aug 17 Reserved by VulDB
Aug 19 Published (CNA: VulDB)
Aug 20 RESCORED — CVE-2022-4996 (mruby). CVSS 6.9 → 5.5 (NVD).
Aug 21 EXPLOIT PUBLISHED — CVE-2022-4996 (mruby). Public exploit reference added.
Description
A flaw has been found in mruby 3.1.0. Affected is the function udiv of the file bigint.c. Executing a manipulation can lead to floating point comparison with incorrect operator. It is possible to launch the attack remotely. The exploit has been published and may be used. It is best practice to apply a patch to resolve this issue.
Lifecycle
Complete event history — 4 events, chronological
| Date | Event | Detail |
|---|
| August 17, 2026 | Reserved | Reserved by VulDB |
| August 19, 2026 | Published | Published (CNA: VulDB) |
| August 20, 2026 | RESCORED | RESCORED — CVE-2022-4996 (mruby). CVSS 6.9 → 5.5 (NVD). |
| August 21, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2022-4996 (mruby). Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| n/a | mruby | — | 3.1.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2022-4996 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
