{"cve":"CVE-2022-23087","nvd":{"published":"2024-02-15T05:15:09.337","modified":"2026-06-17T04:29:28.913","status":"Modified","description":"The e1000 network adapters permit a variety of modifications to an Ethernet packet when it is being transmitted.  These include the insertion of IP and TCP checksums, insertion of an Ethernet VLAN header, and TCP segmentation offload (\"TSO\").  The e1000 device model uses an on-stack buffer to generate the modified packet header when simulating these modifications on transmitted packets.\n\nWhen checksum offload is requested for a transmitted packet, the e1000 device model used a guest-provided value to specify the checksum offset in the on-stack buffer.  The offset was not validated for certain packet types.\n\nA misbehaving bhyve guest could overwrite memory in the bhyve process on the host, possibly leading to code execution in the host context.\n\nThe bhyve process runs in a Capsicum sandbox, which (depending on the FreeBSD version and bhyve configuration) limits the impact of exploiting this issue.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":8.8},"cwes":["CWE-787"],"references":["https://security.freebsd.org/advisories/FreeBSD-SA-22:05.bhyve.asc","https://security.netapp.com/advisory/ntap-20240415-0005/","https://security.freebsd.org/advisories/FreeBSD-SA-22:05.bhyve.asc","https://security.netapp.com/advisory/ntap-20240415-0005/"],"products":["freebsd:freebsd"],"source":"nvd","synced_at":"2026-10-19T21:45:59.823092188+00:00"},"epss":{"cve":"CVE-2022-23087","score":0.00209,"percentile":0.1101,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}