CVE-2022-2639

An integer coercion error was found in the openvswitch kernel module. Given a sufficiently large number of actions, while copying and reserving memory for a new action of a new flow, the reserve_sfa_size() function does not return -EMSGSIZE as expected, potentially leading to an out-of-bounds write access. This flaw allows a local user to crash or potentially escalate their privileges on the system.

The openvswitch is not supported out of the Layered Products subscriptions (OCP, OSP, RHV). There are no Layered Products based on Red Hat Enterprise Linux 7 at the present time. Therefore, this CVE is not planned to be addressed on Red Hat Enterprise Linux 7.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To mitigate this issue, it is possible to prevent the affected code from being loaded by blocklisting the openvswitch kernel module. For instructions relating to blocklisting a kernel module, please see https://access.redhat.com/solutions/41278.