CVE-2022-48933: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix memory leak during stateful obj update stateful objects can be updated from the control plane. The transaction logic allocates a temporary object for this purpose. The ->init function was called for this object, so plain kfree() leaks resources. We must call ->destroy function of the object. nft_obj_destroy does this, but it also decrements the module refcount, but the update path doesn't increment it. To avoid special-casing the update object release, do module_get for the update case too and release it via nft_obj_destroy().

Affected products

• Linux Linux Kernel: from 5.4, before 5.4.182 (fixed in 5.4.182); from 5.5, before 5.10.103 (fixed in 5.10.103); from 5.11, before 5.15.26 (fixed in 5.15.26); from 5.16, before 5.16.12 (fixed in 5.16.12)

Published 2024-08-22. Last modified 2026-06-17.