CVE-2019-5609

mediumpriority · track · 30EPSS 0.013 · 70 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.29% (70th) EPSS

CVSS 6.4 · medium

Is it mine?

6 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

In FreeBSD 12.0-STABLE before r350619, 12.0-RELEASE before 12.0-RELEASE-p9, 11.3-STABLE before r350619, 11.3-RELEASE before 11.3-RELEASE-p2, and 11.2-RELEASE before 11.2-RELEASE-p13, the bhyve e1000 device emulation used a guest-provided value to determine the size of the on-stack buffer without validation when TCP segmentation offload is requested for a transmitted packet. A misbehaving bhyve guest could overwrite memory in the bhyve process on the host.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.4–7.5

v2.06.4mediumAV:N/AC:L/Au:N/C:N/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 4.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimary

affected products (6)

Products and version ranges known to be affected.

n/a FreeBSD≤ before 11.3-RELEASE-p2enisa_euvdEU
n/a FreeBSD≤ before 12.0-RELEASE-p9enisa_euvdEU
n/a FreeBSD≤ and before 11.2-RELEASE-p13enisa_euvdEU
freebsd freebsd= 11.2nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 11.3nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 12.0nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2019-08-30modified 2026-06-17

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+16123 more

references (12)

External citations — patches, advisories, analysis.

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