How severe is CVE-1999-0431?

CVE-1999-0431 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-0431 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0431?

CVE-1999-0431 primarily affects Linux Linux Kernel. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0431?

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

When was CVE-1999-0431 published?

CVE-1999-0431 was published on 1999-03-01 and last updated on 2026-06-16.

CVE-1999-0431

CVE-1999-0431 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.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 7% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Linux Linux Kernel
Published: 1999-03-01
Last modified: 2026-06-16

Description

Linux 2.2.3 and earlier allow a remote attacker to perform an IP fragmentation attack, causing a denial of service.

Frequently asked questions

What is CVE-1999-0431?: Linux 2.2.3 and earlier allow a remote attacker to perform an IP fragmentation attack, causing a denial of service.
How severe is CVE-1999-0431?: CVE-1999-0431 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-1999-0431 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0431?: CVE-1999-0431 primarily affects Linux Linux Kernel. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0431?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0431 published?: CVE-1999-0431 was published on 1999-03-01 and last updated on 2026-06-16.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0431

Affected products (12)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.1.89:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.2.0:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.2.10:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.2.12:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.2.13:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.2.14:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.2.15:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.2.15:pre16:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.2.15_pre20:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.2.16:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.2.16:pre6:*:*:*:*:*:*

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