How severe is CVE-2009-3234?

CVE-2009-3234 has a CVSS 2.0 base score of 4.9, rated medium severity.

Is CVE-2009-3234 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-2009-3234?

CVE-2009-3234 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-3234?

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

When was CVE-2009-3234 published?

CVE-2009-3234 was published on 2009-09-17 and last updated on 2026-06-16.

CVE-2009-3234

CVE-2009-3234 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 2.0 base score of 4.9. 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: Medium (CVSS 2.0 base score 4.9)
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Linux Linux Kernel
Published: 2009-09-17
Last modified: 2026-06-16

Description

Buffer overflow in the perf_copy_attr function in kernel/perf_counter.c in the Linux kernel 2.6.31-rc1 allows local users to cause a denial of service (crash) and execute arbitrary code via a "big size data" to the perf_counter_open system call.

Frequently asked questions

What is CVE-2009-3234?: Buffer overflow in the perf_copy_attr function in kernel/perf_counter.c in the Linux kernel 2.6.31-rc1 allows local users to cause a denial of service (crash) and execute arbitrary code via a "big size data" to the perf_counter_open system call.
How severe is CVE-2009-3234?: CVE-2009-3234 has a CVSS 2.0 base score of 4.9, rated medium severity.
Is CVE-2009-3234 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-2009-3234?: CVE-2009-3234 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-3234?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-3234 published?: CVE-2009-3234 was published on 2009-09-17 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:linux:linux_kernel:2.6.31:rc1:*:*:*:*:*:*

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