CVE-2021-46991: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: i40e: Fix use-after-free in i40e_client_subtask() Currently the call to i40e_client_del_instance frees the object pf->cinst, however pf->cinst->lan_info is being accessed after the free. Fix this by adding the missing return. Addresses-Coverity: ("Read from pointer after free")

Affected products

• Linux Linux Kernel: from 4.16, before 4.19.191 (fixed in 4.19.191); from 4.20, before 5.4.120 (fixed in 5.4.120); from 5.5, before 5.10.38 (fixed in 5.10.38); from 5.11, before 5.11.22 (fixed in 5.11.22); from 5.12, before 5.12.5 (fixed in 5.12.5)

Published 2024-02-28. Last modified 2026-06-17.