CVE-2019-5609

7.5 highEPSS 1.3%

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.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS: 1.3% chance of exploitation in the next 30 days; higher than 70% of CVEs (scores of 2026-10-31)
CWE: CWE-787
Published: 2019-08-30
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

freebsd:freebsd

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/

Check your stack JSON