CVE-2019-5609

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-08-30 · updated 2026-06-17
Weakness: CWE-787

Description

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.

Affected products

FreeBSD: 11.2, 11.2-p10, 11.2-p11, 11.2-p12, 11.2-p13, 11.2-p2 (+17)

References

https://security.FreeBSD.org/advisories/FreeBSD-SA-19:21.bhyve.asc
https://security.netapp.com/advisory/ntap-20190910-0002/
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:21.bhyve.asc
https://security.netapp.com/advisory/ntap-20190910-0002/

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