CVE-2024-58007

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.

This vulnerability is rated as having Moderate impact for Red Hat Enterprise Linux because exploitation requires local access and is restricted to platforms running on specific Qualcomm hardware, limiting the blast radius to local information disclosure or denial of service. Standard enterprise installations on x86_64 architecture do not employ Qualcomm system-on-chip components and are inherently unaffected. On systems utilizing Qualcomm SoCs, an unprivileged local user querying device attributes via sysfs can cause the driver to read beyond intended buffer boundaries, potentially exposing adjacent memory contents from shared memory.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.