CVE-2022-49031 Information

Description

In the Linux kernel the following vulnerability has been resolved:

iio: health: afe4403: Fix oob read in afe4403_read_raw

KASAN report out-of-bounds read as follows:

BUG: KASAN: global-out-of-bounds in afe4403_read_raw+0x42e/0x4c0 Read of size 4 at addr ffffffffc02ac638 by task cat/279

Call Trace: afe4403_read_raw iio_read_channel_info dev_attr_show

The buggy address belongs to the variable: afe4403_channel_leds+0x18/0xffffffffffffe9e0

This issue can be reproduced by singe command:

$ cat /sys/bus/spi/devices/spi0.0/iio:device0/in_intensity6_raw

The array size of afe4403_channel_leds is less than channels so access with chan->address cause OOB read in afe4403_read_raw. Fix it by moving access before use it.

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/98afcb5f3be645d330c74c5194ba0d80e26f95e0 https://git.kernel.org/stable/c/c9268df36818ee4eaaaeadc80009b442a5ca69c9 https://git.kernel.org/stable/c/726fa3e4ab97dcff1c745bdc4fb137366cb8d3df https://git.kernel.org/stable/c/2d6a437064ffbe685c67ddb16dfc0946074c6c3f https://git.kernel.org/stable/c/b1756af172fb80a3edc143772d49e166ec691b6c https://git.kernel.org/stable/c/e7e76a77aabef8989cbc0a8417af1aa040620867 https://git.kernel.org/stable/c/06c6ce21cec77dfa860d57e7a006000a57812efb https://git.kernel.org/stable/c/58143c1ed5882c138a3cd2251a336fc8755f23d9

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