Vulnerability · Published Jan 11, 2020 · Assigned by mitre
CVE-2020-6840
Critical 9.8
In plain English
A critical-severity security flaw in the mruby package (Ubuntu). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 74% of all known vulnerabilities).
Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)1.5%top 25.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
In mruby 2.1.0, there is a use-after-free in hash_slice in mrbgems/mruby-hash-ext/src/hash-ext.c.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | mruby | no fix listed | UBUNTU-CVE-2020-6840 |
| Ubuntu:24.04:LTS | mruby | no fix listed | UBUNTU-CVE-2020-6840 |
| Ubuntu:25.10 | mruby | no fix listed | UBUNTU-CVE-2020-6840 |
| Ubuntu:26.04:LTS | mruby | no fix listed | UBUNTU-CVE-2020-6840 |
| Ubuntu:26.10 | mruby | no fix listed | UBUNTU-CVE-2020-6840 |
Affected products (as reported)
References
- https://github.com/mruby/mruby/issues/4927 x_refsource_MISC