CVE-2022-49019

In the Linux kernel, the following vulnerability has been resolved:

net: ethernet: nixge: fix NULL dereference

In function nixge_hw_dma_bd_release() dereference of NULL pointer priv->rx_bd_v is possible for the case of its allocation failure in nixge_hw_dma_bd_init().

Move for() loop with priv->rx_bd_v dereference under the check for its validity.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Weakness

A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.

Affected Software

Potential Mitigations

References

• https://git.kernel.org/stable/c/45752af0247589e6d3dede577415bfe117b4392c
• https://git.kernel.org/stable/c/80e82f7b440b65cf131dce10f487dc73a7046e6b
• https://git.kernel.org/stable/c/910c0264b64ef2dad8887714a7c56c93e39a0ed3
• https://git.kernel.org/stable/c/9256db4e45e8b497b0e993cc3ed4ad08eb2389b6
• https://git.kernel.org/stable/c/9c584d6d9cfb935dce8fc81a4c26debac0a3049b