CVE-2022-23085 Potential jail escape vulnerabilities in netmap

A user-provided integer option was passed to nmreqcopyin without checking if it would overflow. This insufficient bounds checking could lead to kernel memory corruption. On systems configured to include netmap in their devfsruleset, a privileged process running in a jail can affect the host...

CVE-2022-23085

CVE-2022-23085 arises from an insufficient bounds check: a user-provided integer option passed to netmap’s nmreq_copyin() could overflow, risking kernel memory corruption. Documents in the FreeBSD Netmap advisory SA-22:04 and related CVE records confirm the flaw in the netmap component, enabling ...