An integer underflow in dpdk versions before 18.11.10 and before 19.11.5 in the `move_desc` function can lead to large amounts of CPU cycles being eaten up in a long running loop. An attacker could cause `move_desc` to get stuck in a 4,294,967,295-count iteration loop. Depending on how `vhost_crypto` is being used this could prevent other VMs or network tasks from being serviced by the busy DPDK lcore for an extended period.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14378
Reference (s):
- https://bugzilla.redhat.com/show_bug.cgi?id=1879473
- URL: https://bugzilla.redhat.com/show_bug.cgi?id=1879473
- https://www.openwall.com/lists/oss-security/2020/09/28/3
- URL: https://www.openwall.com/lists/oss-security/2020/09/28/3
- MLIST:[oss-security] 20210104 Re: DPDK security advisory for multiple vhost crypto issues