How severe is CVE-2012-5109?

CVE-2012-5109 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2012-5109 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-5109?

CVE-2012-5109 primarily affects Google Chrome. In total, 56 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-5109?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2012-5109 published?

CVE-2012-5109 was published on 2012-10-09 and last updated on 2026-06-16.

CVE-2012-5109

CVE-2012-5109 is a medium-severity vulnerability in Google Chrome with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Google Chrome
Published: 2012-10-09
Last modified: 2026-06-16

Description

The International Components for Unicode (ICU) functionality in Google Chrome before 22.0.1229.92 allows remote attackers to cause a denial of service (out-of-bounds read) via vectors related to a regular expression.

Frequently asked questions

What is CVE-2012-5109?: The International Components for Unicode (ICU) functionality in Google Chrome before 22.0.1229.92 allows remote attackers to cause a denial of service (out-of-bounds read) via vectors related to a regular expression.
How severe is CVE-2012-5109?: CVE-2012-5109 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2012-5109 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-5109?: CVE-2012-5109 primarily affects Google Chrome. In total, 56 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-5109?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-5109 published?: CVE-2012-5109 was published on 2012-10-09 and last updated on 2026-06-16.

References

Affected products (56)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.0:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.1:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.2:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.3:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.4:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.6:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.7:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.8:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.9:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.10:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.11:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.12:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.14:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.16:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.17:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.18:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.20:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.21:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.22:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.23:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.24:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.25:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.26:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.27:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.28:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.29:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.31:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.32:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.33:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.35:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.36:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.37:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.39:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.48:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.49:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.50:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.51:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.52:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:22.0.1229.53:*:*:*:*:*:*:*

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