Is CVE-2012-5838 in the CISA KEV catalog?

No. CVE-2012-5838 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2012-5838?

CVE-2012-5838 has a CVSS v2 base score of 9.3 (HIGH).

What is the EPSS score for CVE-2012-5838?

CVE-2012-5838 has an EPSS score of 6.16% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2012-5838?

Upgrade DeveloperEdition to 10.0.11 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2012-5838

HIGHEPSS 93th pctl

9.3

CVSS v2

NVD

Description

The copyTexImage2D implementation in the WebGL subsystem in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via large image dimensions.

CWE-119Buffer Overflow

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:10.0.11Fixed in:10.0.11Mozilla

Affected:17.0Fixed in:17.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:17.0Fixed in:17.0Mozilla

Affected:10.0.11Fixed in:10.0.11Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:17.0Fixed in:17.0Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

6.16%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Patch1

bugzilla.mozilla.org

Vendor Advisory1

mozilla.org

Third-Party Advisory17

Other references1

osvdb.org

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.