CVE-2024-58007 Information

Description

In the Linux kernel the following vulnerability has been resolved:

soc: qcom: socinfo: Avoid out of bounds read of serial number

On MSM8916 devices the serial number exposed in sysfs is constant and does not change across individual devices. It’s always:

db410c:/sys/devices/soc0$ cat serial_number 2644893864

The firmware used on MSM8916 exposes SOCINFO_VERSION(0 8) which does not have support for the serial_num field in the socinfo struct. There is an existing check to avoid exposing the serial number in that case but it’s not correct: When checking the item_size returned by SMEM we need to make sure the end of the serial_num is within bounds instead of comparing with the start offset. The serial_number currently exposed on MSM8916 devices is just an out of bounds read of whatever comes after the socinfo struct in SMEM.

Fix this by changing offsetof() to offsetofend() so that the size of the field is also taken into account.

Reference

https://git.kernel.org/stable/c/0a92feddae0634a0b87c04b19d343f6af97af700 https://git.kernel.org/stable/c/22cf4fae6660b6e1a583a41cbf84e3046ca9ccd0 https://git.kernel.org/stable/c/407c928305c1a37232a63811c400ef616f85ccbc https://git.kernel.org/stable/c/47470acd719d45c4c8c418c07962f74cc995652b https://git.kernel.org/stable/c/9c88b3a3fae4d60641c3a45be66269d00eff33cd