Skip to content
Fencer Intel
medium 6.8

CVE-2011-0188 json

The VpMemAlloc function in bigdecimal.c in the BigDecimal class in Ruby 1.9.2-p136 and earlier, as used on Apple Mac OS X before 10.6.7 and…

published 2011-03-23 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-0214

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.0%
EPSS 3.0% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

The VpMemAlloc function in bigdecimal.c in the BigDecimal class in Ruby 1.9.2-p136 and earlier, as used on Apple Mac OS X before 10.6.7 and other platforms, does not properly allocate memory, which allows context-dependent attackers to execute arbitrary code or cause a denial of service (application crash) via vectors involving creation of a large BigDecimal value within a 64-bit process, related to an "integer truncation issue."

Patch / fix

  • ruby4.0 hummingbird 1 4.0.0-33.3.hum1
  • ruby4.0-libs hummingbird 1 4.0.0-33.3.hum1
  • ruby4.0-bundled-gems hummingbird 1 4.0.0-33.3.hum1
  • ruby4.0-default-gems hummingbird 1 4.0.0-33.3.hum1
  • ruby3.3 hummingbird 1 3.3.10-23.1.hum1
  • ruby3.3-libs hummingbird 1 3.3.10-23.1.hum1
  • ruby3.3-bundled-gems hummingbird 1 3.3.10-23.1.hum1
  • ruby3.3-default-gems hummingbird 1 3.3.10-23.1.hum1

red hat advisories RHSA-2026:8838RHSA-2026:7305RHSA-2026:7307RHSA-2011:0910RHSA-2011:0909RHSA-2011:0908

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-0188 updated cvss 5.1

ruby: memory corruption in BigDecimal on 64bit platforms

  • Red Hat Enterprise Linux (v. 5.6.z server) ruby 1.8.5-19.el5_6.1, ruby-ri 1.8.5-19.el5_6.1, ruby-irb 1.8.5-19.el5_6.1, ruby-libs 1.8.5-19.el5_6.1, ruby-mode 1.8.5-19.el5_6.1, ruby-rdoc 1.8.5-19.el5_6.1, +1 more
    fixed: vendor fix RHSA-2011:0909
  • Red Hat Enterprise Linux AS version 4 irb 1.8.1-16.el4, ruby 1.8.1-16.el4, ruby-libs 1.8.1-16.el4, ruby-mode 1.8.1-16.el4, ruby-tcltk 1.8.1-16.el4 Red Hat Enterprise Linux Desktop version 4 irb 1.8.1-16.el4, ruby 1.8.1-16.el4, ruby-libs 1.8.1-16.el4, ruby-mode 1.8.1-16.el4, ruby-tcltk 1.8.1-16.el4 Red Hat Enterprise Linux ES version 4 irb 1.8.1-16.el4, ruby 1.8.1-16.el4, ruby-libs 1.8.1-16.el4, ruby-mode 1.8.1-16.el4, ruby-tcltk 1.8.1-16.el4
    fixed: vendor fix RHSA-2011:0908
  • Red Hat Enterprise Linux Server (v. 6) ruby 1.8.7.299-7.el6_1.1, ruby-ri 1.8.7.299-7.el6_1.1, ruby-irb 1.8.7.299-7.el6_1.1, ruby-libs 1.8.7.299-7.el6_1.1, ruby-rdoc 1.8.7.299-7.el6_1.1, ruby-tcltk 1.8.7.299-7.el6_1.1 Red Hat Enterprise Linux Server Optional (v. 6) ruby 1.8.7.299-7.el6_1.1, ruby-ri 1.8.7.299-7.el6_1.1, ruby-irb 1.8.7.299-7.el6_1.1, ruby-libs 1.8.7.299-7.el6_1.1, ruby-rdoc 1.8.7.299-7.el6_1.1, ruby-tcltk 1.8.7.299-7.el6_1.1
    fixed: vendor fix RHSA-2011:0910
  • Red Hat Enterprise Linux WS version 4 irb 1.8.1-16.el4, ruby 1.8.1-16.el4, ruby-libs 1.8.1-16.el4, ruby-mode 1.8.1-16.el4, ruby-tcltk 1.8.1-16.el4
    fixed: vendor fix RHSA-2011:0908
  • Red Hat Hardened Images ruby3.4 3.4.8-31.1.hum1, ruby4.0 4.0.0-33.3.hum1, ruby3.3 3.3.10-23.1.hum1, ruby3.4-default-gems 3.4.8-31.1.hum1, ruby4.0-default-gems 4.0.0-33.3.hum1, ruby3.3-default-gems 3.3.10-23.1.hum1
    fixed: vendor fix RHSA-2026:7305

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.02% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.