CVE-2002-0820

CVE-2002-0820 is a high-severity vulnerability in Freebsd with a CVSS 2.0 base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

FreeBSD kernel 4.6 and earlier closes the file descriptors 0, 1, and 2 after they have already been assigned to /dev/null when the descriptors reference procfs or linprocfs, which could allow local users to reuse the file descriptors in a setuid or setgid program to modify critical data and gain privileges.

Frequently asked questions

What is CVE-2002-0820?
FreeBSD kernel 4.6 and earlier closes the file descriptors 0, 1, and 2 after they have already been assigned to /dev/null when the descriptors reference procfs or linprocfs, which could allow local users to reuse the file descriptors in a setuid or setgid program to modify critical data and gain privileges.
How severe is CVE-2002-0820?
CVE-2002-0820 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-2002-0820 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2002-0820?
CVE-2002-0820 affects Freebsd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2002-0820?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2002-0820 published?
CVE-2002-0820 was published on 2002-08-12 and last updated on 2026-06-16.

References

Affected products (1)

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