CVE-2009-5147
DL::dlopen in Ruby 1.8, 1.9.0, 1.9.2, 1.9.3, 2.0.0 before patchlevel 648, and 2.1 before 2.1.8 opens libraries with tainted names.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (7.83%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
DL::dlopen in Ruby 1.8, 1.9.0, 1.9.2, 1.9.3, 2.0.0 before patchlevel 648, and 2.1 before 2.1.8 opens libraries with tainted names.
- CVSS 3.0
- 7.3 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- EPSS
- 7.83% probability · 95th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- ruby-lang/ruby
- Source
- cve@mitre.org
EPSS moved from 10.2% on 21 September 2026 to 7.8% on 26 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://seclists.org/oss-sec/2015/q3/222Patch, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/76060Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:0583
- https://bugzilla.redhat.com/show_bug.cgi?id=1248935Issue Tracking, Patch, Third Party Advisory, VDB Entry
- https://github.com/ruby/ruby/commit/4600cf725a86ce31266153647ae5aa1197b1215bPatch, Third Party Advisory
- https://www.ruby-lang.org/en/news/2015/12/16/unsafe-tainted-string-usage-in-fiddle-and-dl-cve-2015-7551/Vendor Advisory
- http://seclists.org/oss-sec/2015/q3/222Patch, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/76060Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:0583
- https://bugzilla.redhat.com/show_bug.cgi?id=1248935Issue Tracking, Patch, Third Party Advisory, VDB Entry
- https://github.com/ruby/ruby/commit/4600cf725a86ce31266153647ae5aa1197b1215bPatch, Third Party Advisory
- https://www.ruby-lang.org/en/news/2015/12/16/unsafe-tainted-string-usage-in-fiddle-and-dl-cve-2015-7551/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.