CVE-2024-38541: of: module: add buffer overflow check in of_modalias()

Description

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

of: module: add buffer overflow check in of_modalias()

In of_modalias(), if the buffer happens to be too small even for the 1st
snprintf() call, the len parameter will become negative and str parameter
(if not NULL initially) will point beyond the buffer's end. Add the buffer
overflow check after the 1st snprintf() call and fix such check after the
strlen() call (accounting for the terminating NUL char).

Classification

CVE ID: CVE-2024-38541

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.05% (probability of being exploited)

EPSS Percentile: 17.83% (scored less or equal to compared to others)

EPSS Date: 2025-02-04 (when was this score calculated)

References

https://git.kernel.org/stable/c/0b0d5701a8bf02f8fee037e81aacf6746558bfd6
https://git.kernel.org/stable/c/ee332023adfd5882808f2dabf037b32d6ce36f9e
https://git.kernel.org/stable/c/e45b69360a63165377b30db4a1dfddd89ca18e9a
https://git.kernel.org/stable/c/cf7385cb26ac4f0ee6c7385960525ad534323252

Timeline