How severe is CVE-2010-0309?

CVE-2010-0309 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2010-0309 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-0309?

CVE-2010-0309 affects Linux Kernel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2010-0309?

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

When was CVE-2010-0309 published?

CVE-2010-0309 was published on 2010-02-12 and last updated on 2026-06-16.

CVE-2010-0309

CVE-2010-0309 is a medium-severity vulnerability in Linux Kernel with a CVSS 2.0 base score of 6.8. 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-16.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-16
Affected product: Linux Kernel
Published: 2010-02-12
Last modified: 2026-06-16

Description

The pit_ioport_read function in the Programmable Interval Timer (PIT) emulation in i8254.c in KVM 83 does not properly use the pit_state data structure, which allows guest OS users to cause a denial of service (host OS crash or hang) by attempting to read the /dev/port file.

Frequently asked questions

What is CVE-2010-0309?: The pit_ioport_read function in the Programmable Interval Timer (PIT) emulation in i8254.c in KVM 83 does not properly use the pit_state data structure, which allows guest OS users to cause a denial of service (host OS crash or hang) by attempting to read the /dev/port file.
How severe is CVE-2010-0309?: CVE-2010-0309 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2010-0309 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-0309?: CVE-2010-0309 affects Linux Kernel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2010-0309?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2010-0309 published?: CVE-2010-0309 was published on 2010-02-12 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:linux:kernel:*:*:*:*:*:*:*:*

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