CVE-2022-48924

/// Technical description

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

thermal: int340x: fix memory leak in int3400_notify()

It is easy to hit the below memory leaks in my TigerLake platform:

unreferenced object 0xffff927c8b91dbc0 (size 32):

comm "kworker/0:2", pid 112, jiffies 4294893323 (age 83.604s)

hex dump (first 32 bytes):

4e 41 4d 45 3d 49 4e 54 33 34 30 30 20 54 68 65 NAME=INT3400 The

72 6d 61 6c 00 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 rmal.kkkkkkkkkk.

backtrace:

[<ffffffff9c502c3e>] __kmalloc_track_caller+0x2fe/0x4a0

[<ffffffff9c7b7c15>] kvasprintf+0x65/0xd0

[<ffffffff9c7b7d6e>] kasprintf+0x4e/0x70

[<ffffffffc04cb662>] int3400_notify+0x82/0x120 [int3400_thermal]

[<ffffffff9c8b7358>] acpi_ev_notify_dispatch+0x54/0x71

[<ffffffff9c88f1a7>] acpi_os_execute_deferred+0x17/0x30

[<ffffffff9c2c2c0a>] process_one_work+0x21a/0x3f0

[<ffffffff9c2c2e2a>] worker_thread+0x4a/0x3b0

[<ffffffff9c2cb4dd>] kthread+0xfd/0x130

[<ffffffff9c201c1f>]

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References