How severe is CVE-2011-0311?

CVE-2011-0311 has a CVSS 2.0 base score of 3.5, rated low severity.

Is CVE-2011-0311 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0311?

CVE-2011-0311 primarily affects Ibm Java. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0311?

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

When was CVE-2011-0311 published?

CVE-2011-0311 was published on 2011-09-02 and last updated on 2026-06-16.

CVE-2011-0311

CVE-2011-0311 is a low-severity vulnerability in Ibm Java with a CVSS 2.0 base score of 3.5. 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-119.

Key facts

Severity: Low (CVSS 2.0 base score 3.5)
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Ibm Java
Published: 2011-09-02
Last modified: 2026-06-16

Description

The class file parser in IBM Java before 1.4.2 SR13 FP9, as used in IBM Runtimes for Java Technology 5.0.0 before SR13 and 6.0.0 before SR10, allows remote authenticated users to cause a denial of service (JVM segmentation fault, and possibly memory consumption or an infinite loop) via a crafted attribute length field in a class file, which triggers a buffer over-read.

Frequently asked questions

What is CVE-2011-0311?: The class file parser in IBM Java before 1.4.2 SR13 FP9, as used in IBM Runtimes for Java Technology 5.0.0 before SR13 and 6.0.0 before SR10, allows remote authenticated users to cause a denial of service (JVM segmentation fault, and possibly memory consumption or an infinite loop) via a crafted attribute length field in a class file, which triggers a buffer over-read.
How severe is CVE-2011-0311?: CVE-2011-0311 has a CVSS 2.0 base score of 3.5, rated low severity.
Is CVE-2011-0311 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-0311?: CVE-2011-0311 primarily affects Ibm Java. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-0311?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-0311 published?: CVE-2011-0311 was published on 2011-09-02 and last updated on 2026-06-16.

References

Affected products (29)

cpe:2.3:a:ibm:java:*:*:*:*:*:*:*:*
cpe:2.3:a:ibm:java:1.4.2:*:*:*:*:*:*:*
cpe:2.3:a:ibm:java:1.4.2.13:*:*:*:*:*:*:*
cpe:2.3:a:ibm:java:1.4.2.13.1:*:*:*:*:*:*:*
cpe:2.3:a:ibm:java:1.4.2.13.2:*:*:*:*:*:*:*
cpe:2.3:a:ibm:java:1.4.2.13.3:*:*:*:*:*:*:*
cpe:2.3:a:ibm:java:1.4.2.13.4:*:*:*:*:*:*:*
cpe:2.3:a:ibm:java:1.4.2.13.5:*:*:*:*:*:*:*
cpe:2.3:a:ibm:java:1.4.2.13.6:*:*:*:*:*:*:*
cpe:2.3:a:ibm:java:1.4.2.13.7:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:*:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:5.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:5.0.11.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:5.0.11.1:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:5.0.11.2:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:5.0.12.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:5.0.12.1:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:5.0.12.2:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:5.0.12.3:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:6.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:6.0.1.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:6.0.2.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:6.0.3.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:6.0.4.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:6.0.5.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:6.0.6.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:6.0.7.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:6.0.8.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:runtimes_for_java_technology:6.0.8.1:*:*:*:*:*:*:*

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