How severe is CVE-2009-1935?

CVE-2009-1935 has a CVSS 2.0 base score of 4.9, rated medium severity.

Is CVE-2009-1935 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1935?

CVE-2009-1935 primarily affects Freebsd. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-1935?

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

When was CVE-2009-1935 published?

CVE-2009-1935 was published on 2009-06-18 and last updated on 2026-06-16.

CVE-2009-1935

CVE-2009-1935 is a medium-severity vulnerability in Freebsd with a CVSS 2.0 base score of 4.9. 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-189.

Key facts

Severity: Medium (CVSS 2.0 base score 4.9)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Freebsd
Published: 2009-06-18
Last modified: 2026-06-16

Description

Integer overflow in the pipe_build_write_buffer function (sys/kern/sys_pipe.c) in the direct write optimization feature in the pipe implementation in FreeBSD 7.1 through 7.2 and 6.3 through 6.4 allows local users to bypass virtual-to-physical address lookups and read sensitive information in memory pages via unspecified vectors.

Frequently asked questions

What is CVE-2009-1935?: Integer overflow in the pipe_build_write_buffer function (sys/kern/sys_pipe.c) in the direct write optimization feature in the pipe implementation in FreeBSD 7.1 through 7.2 and 6.3 through 6.4 allows local users to bypass virtual-to-physical address lookups and read sensitive information in memory pages via unspecified vectors.
How severe is CVE-2009-1935?: CVE-2009-1935 has a CVSS 2.0 base score of 4.9, rated medium severity.
Is CVE-2009-1935 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1935?: CVE-2009-1935 primarily affects Freebsd. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1935?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-1935 published?: CVE-2009-1935 was published on 2009-06-18 and last updated on 2026-06-16.

References

Affected products (15)

cpe:2.3:o:freebsd:freebsd:6.3:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:6.3:release_p10:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:6.3_releng:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:6.4:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:6.4:release_p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:6.4:stable:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:pre-release:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:rc1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:release-p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:release-p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:release-p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.1:stable:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.2:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:7.2:pre-release:*:*:*:*:*:*

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