How severe is CVE-2006-4303?

CVE-2006-4303 has a CVSS 2.0 base score of 2.6, rated low severity.

Is CVE-2006-4303 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-4303?

CVE-2006-4303 affects Sun Solaris. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2006-4303?

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

When was CVE-2006-4303 published?

CVE-2006-4303 was published on 2006-08-23 and last updated on 2026-06-16.

CVE-2006-4303

CVE-2006-4303 is a low-severity vulnerability in Sun Solaris with a CVSS 2.0 base score of 2.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Low (CVSS 2.0 base score 2.6)
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Sun Solaris
Published: 2006-08-23
Last modified: 2026-06-16

Description

Race condition in (1) libnsl and (2) TLI/XTI API routines in Sun Solaris 10 allows remote attackers to cause a denial of service ("tight loop" and CPU consumption for listener applications) via unknown vectors related to TCP fusion (do_tcp_fusion).

Frequently asked questions

What is CVE-2006-4303?: Race condition in (1) libnsl and (2) TLI/XTI API routines in Sun Solaris 10 allows remote attackers to cause a denial of service ("tight loop" and CPU consumption for listener applications) via unknown vectors related to TCP fusion (do_tcp_fusion).
How severe is CVE-2006-4303?: CVE-2006-4303 has a CVSS 2.0 base score of 2.6, rated low severity.
Is CVE-2006-4303 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-4303?: CVE-2006-4303 affects Sun Solaris. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2006-4303?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-4303 published?: CVE-2006-4303 was published on 2006-08-23 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:sun:solaris:10.0:*:sparc:*:*:*:*:*

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