CVE-2024-40982

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

ssb: Fix potential NULL pointer dereference in ssb_device_uevent()

The ssb_device_uevent() function first attempts to convert the dev pointer to struct ssb_device *. However, it mistakenly dereferences dev before performing the NULL check, potentially leading to a NULL pointer dereference if dev is NULL.

To fix this issue, move the NULL check before dereferencing the dev pointer, ensuring that the pointer is valid before attempting to use it.

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/789c17185fb0f39560496c2beab9b57ce1d0cbe7
• https://git.kernel.org/stable/c/7d43c8377c6fc846b1812f8df360425c9323dc56
• https://git.kernel.org/stable/c/c5dc2d8eb3981bae261ea7d1060a80868e886813