CVE-2022-49793

Technical Description

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

iio: trigger: sysfs: fix possible memory leak in iio_sysfs_trig_init()

dev_set_name() allocates memory for name, it need be freed

when device_add() fails, call put_device() to give up the

reference that hold in device_initialize(), so that it can

be freed in kobject_cleanup() when the refcount hit to 0.

Fault injection test can trigger this:

unreferenced object 0xffff8e8340a7b4c0 (size 32):

comm "modprobe", pid 243, jiffies 4294678145 (age 48.845s)

hex dump (first 32 bytes):

69 69 6f 5f 73 79 73 66 73 5f 74 72 69 67 67 65 iio_sysfs_trigge

72 00 a7 40 83 8e ff ff 00 86 13 c4 f6 ee ff ff r..@............

backtrace:

[<0000000074999de8>] __kmem_cache_alloc_node+0x1e9/0x360

[<00000000497fd30b>] __kmalloc_node_track_caller+0x44/0x1a0

[<000000003636c520>] kstrdup+0x2d/0x60

[<0000000032f84da2>] kobject_set_name_vargs+0x1e/0x90

[<0000000092efe493>] dev_set_name+0x4e/0x70

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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.

Affected Products

References