How severe is CVE-2001-1047?

CVE-2001-1047 has a CVSS 2.0 base score of 1.2, rated low severity.

Is CVE-2001-1047 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-1047?

CVE-2001-1047 primarily affects Openbsd. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2001-1047?

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

When was CVE-2001-1047 published?

CVE-2001-1047 was published on 2001-06-02 and last updated on 2026-06-16.

CVE-2001-1047

CVE-2001-1047 is a low-severity vulnerability in Openbsd with a CVSS 2.0 base score of 1.2. 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 1.2)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Openbsd
Published: 2001-06-02
Last modified: 2026-06-16

Description

Race condition in OpenBSD VFS allows local users to cause a denial of service (kernel panic) by (1) creating a pipe in one thread and causing another thread to set one of the file descriptors to NULL via a close, or (2) calling dup2 on a file descriptor in one process, then setting the descriptor to NULL via a close in another process that is created via rfork.

Frequently asked questions

What is CVE-2001-1047?: Race condition in OpenBSD VFS allows local users to cause a denial of service (kernel panic) by (1) creating a pipe in one thread and causing another thread to set one of the file descriptors to NULL via a close, or (2) calling dup2 on a file descriptor in one process, then setting the descriptor to NULL via a close in another process that is created via rfork.
How severe is CVE-2001-1047?: CVE-2001-1047 has a CVSS 2.0 base score of 1.2, rated low severity.
Is CVE-2001-1047 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-1047?: CVE-2001-1047 primarily affects Openbsd. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2001-1047?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2001-1047 published?: CVE-2001-1047 was published on 2001-06-02 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:o:openbsd:openbsd:2.6:*:*:*:*:*:*:*
cpe:2.3:o:openbsd:openbsd:2.7:*:*:*:*:*:*:*
cpe:2.3:o:openbsd:openbsd:2.8:*:*:*:*:*:*:*
cpe:2.3:o:openbsd:openbsd:2.9:*:*:*:*:*:*:*

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