CVE-2012-5372: Rubinius computes hash values without properly restricting the ability to trigger hash collisions predictably,

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MEDIUM 5.0MITIGATE

CVE-2012-5372 is a medium-severity flaw (CVSS 5.0) affecting rubinius. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Rubinius computes hash values without properly restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table, as demonstrated by a universal multicollision attack against the MurmurHash3 algorithm.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-310
Published	2012-11-28
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: rubinius

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2012-11-28 13:03 UTCPublished CVE record published
2026-06-16 23:46 UTCUpdated Record last modified

rubinius rubinius MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy rubinius || rpm -q rubinius || rubinius --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2012-5372?

rubinius: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2012-5372 being exploited?

CVE-2012-5372 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2012-5372 affect?

CVE-2012-5372 affects rubinius. Severity is medium (CVSS 5.0). Rubinius computes hash values without properly restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that

How urgent is CVE-2012-5372?

Priority 43/100. Public exploit reference

References

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