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Fencer Intel
high 7.5

CVE-2011-4599 json

Stack-based buffer overflow in the _canonicalize function in common/uloc.c in International Components for Unicode (ICU) before 49.1 allows…

published 2012-06-21 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-4523

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
7.9%
EPSS 7.9% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

Stack-based buffer overflow in the _canonicalize function in common/uloc.c in International Components for Unicode (ICU) before 49.1 allows remote attackers to execute arbitrary code via a crafted locale ID that is not properly handled during variant canonicalization.

Patch / fix

  • icu-project international_components_for_unicode 49.1
  • icu Debian 14, Debian 13, Debian 12 4.8.1.1-3

debian advisories DEBIAN-CVE-2011-4599

  • icu RHEL 5 3.6-5.16.1
  • icu RHEL 6 4.2.1-9.1.el6_2
  • libicu RHEL 5 3.6-5.16.1
  • libicu RHEL 6 4.2.1-9.1.el6_2

red hat advisories RHSA-2011:1815

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-2011-4599 updated cvss 5.1

icu: Stack-based buffer overflow by canonicalizing the given localeID

  • Red Hat Enterprise Linux (v. 5 server) icu 3.6-5.16.1, libicu 3.6-5.16.1 Red Hat Enterprise Linux Desktop (v. 5 client) icu 3.6-5.16.1, libicu 3.6-5.16.1 Red Hat Enterprise Linux Desktop (v. 6) icu 4.2.1-9.1.el6_2, libicu 4.2.1-9.1.el6_2 Red Hat Enterprise Linux Desktop Optional (v. 6) icu 4.2.1-9.1.el6_2, libicu 4.2.1-9.1.el6_2 Red Hat Enterprise Linux HPC Node (v. 6) icu 4.2.1-9.1.el6_2, libicu 4.2.1-9.1.el6_2 Red Hat Enterprise Linux HPC Node Optional (v. 6) icu 4.2.1-9.1.el6_2, libicu 4.2.1-9.1.el6_2
    +5 more products
    Red Hat Enterprise Linux Server (v. 6) icu 4.2.1-9.1.el6_2, libicu 4.2.1-9.1.el6_2 Red Hat Enterprise Linux Server Optional (v. 6) icu 4.2.1-9.1.el6_2, libicu 4.2.1-9.1.el6_2 Red Hat Enterprise Linux Workstation (v. 6) icu 4.2.1-9.1.el6_2, libicu 4.2.1-9.1.el6_2 Red Hat Enterprise Linux Workstation Optional (v. 6) icu 4.2.1-9.1.el6_2, libicu 4.2.1-9.1.el6_2 Red Hat RHEL Desktop Workstation (v. 5 client) icu 3.6-5.16.1, libicu 3.6-5.16.1
    fixed: vendor fix RHSA-2011:1815

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

7.91% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

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.