CVE-2022-49032 Information

Description

In the Linux kernel the following vulnerability has been resolved:

iio: health: afe4404: Fix oob read in afe4404_[read|write]_raw

KASAN report out-of-bounds read as follows:

BUG: KASAN: global-out-of-bounds in afe4404_read_raw+0x2ce/0x380 Read of size 4 at addr ffffffffc00e4658 by task cat/278

Call Trace: afe4404_read_raw iio_read_channel_info dev_attr_show

The buggy address belongs to the variable: afe4404_channel_leds+0x18/0xffffffffffffe9c0

This issue can be reproduce by singe command:

$ cat /sys/bus/i2c/devices/0-0058/iio:device0/in_intensity6_raw

The array size of afe4404_channel_leds and afe4404_channel_offdacs are less than channels so access with chan->address cause OOB read in afe4404_[read|write]_raw. Fix it by moving access before use them.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Reference

https://git.kernel.org/stable/c/68de7da092f38395dde523f2e5db26eba6c23e28 https://git.kernel.org/stable/c/113c08030a89aaf406f8a1d4549d758a67c2afba https://git.kernel.org/stable/c/f5575041ec15310bdc50c42b8b22118cc900226e https://git.kernel.org/stable/c/3f566b626029ca8598d48e5074e56bb37399ca1b https://git.kernel.org/stable/c/5eb114f55b37dbc0487aa9c1913b81bb7837f1c4 https://git.kernel.org/stable/c/f7419fc42afc035f6b29ce713e17dcd2000c833f https://git.kernel.org/stable/c/d45d9f45e7b1365fd0d9bf14680d6d5082a590d1 https://git.kernel.org/stable/c/fc92d9e3de0b2d30a3ccc08048a5fad533e4672b

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.1