CVE-2022-4996: mruby bigint.c udiv floating point comparison with incorrect operator

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-20 · updated 2026-08-21
Weakness: CWE-1077

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.

Affected products

mruby/mruby: 3.1.0

References

https://huntr.com/bounties/5a5092df-1699-4497-a8b2-38318bce0c4e
https://vuldb.com/cve/CVE-2022-4996
https://vuldb.com/submit/877513
https://vuldb.com/vuln/391391
https://vuldb.com/vuln/391391/cti

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