How severe is CVE-2005-2099?

CVE-2005-2099 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2005-2099 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-2099?

CVE-2005-2099 primarily affects Linux Linux Kernel. In total, 63 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2005-2099?

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

When was CVE-2005-2099 published?

CVE-2005-2099 was published on 2005-08-23 and last updated on 2026-06-16.

CVE-2005-2099

CVE-2005-2099 is a medium-severity vulnerability in Linux Linux Kernel 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-399.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Linux Linux Kernel
Published: 2005-08-23
Last modified: 2026-06-16

Description

The Linux kernel before 2.6.12.5 does not properly destroy a keyring that is not instantiated properly, which allows local users or remote attackers to cause a denial of service (kernel oops) via a keyring with a payload that is not empty, which causes the creation to fail, leading to a null dereference in the keyring destructor.

Frequently asked questions

What is CVE-2005-2099?: The Linux kernel before 2.6.12.5 does not properly destroy a keyring that is not instantiated properly, which allows local users or remote attackers to cause a denial of service (kernel oops) via a keyring with a payload that is not empty, which causes the creation to fail, leading to a null dereference in the keyring destructor.
How severe is CVE-2005-2099?: CVE-2005-2099 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2005-2099 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-2099?: CVE-2005-2099 primarily affects Linux Linux Kernel. In total, 63 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-2099?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2005-2099 published?: CVE-2005-2099 was published on 2005-08-23 and last updated on 2026-06-16.

References

Affected products (63)

cpe:2.3:o:linux:linux_kernel:2.6.0:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test10:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test11:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test8:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test9:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.1:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.2:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.3:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.4:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.5:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.6:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.6:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.7:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.7:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8.1:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8.1.5:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8.1.5:*:386:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8.1.5:*:686:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8.1.5:*:686_smp:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8.1.5:*:amd64:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8.1.5:*:amd64_k8:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8.1.5:*:amd64_k8_smp:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8.1.5:*:amd64_xeon:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8.1.5:*:k7:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8.1.5:*:k7_smp:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8.1.5:*:power3:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.8.1.5:*:power3_smp:*:*:*:*:*

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