CVE-2022-49031: iio: health: afe4403: Fix oob read in afe4403_read_raw

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-10-21 · updated 2026-06-17
Weakness: CWE-125

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.

Affected products

Linux kernel: from 4.8 before 4.9.335; from 4.10 before 4.14.301; from 4.15 before 4.19.268; from 4.20 before 5.4.226; from 5.5 before 5.10.158; from 5.11 before 5.15.82 — fixed in 4.14.301, 4.19.268, 4.9.335, 5.10.158, 5.15.82, 5.4.226

How to fix

Upgrade to a fixed version: Linux kernel 4.14.301, 4.19.268, 4.9.335, 5.10.158. Check the vendor advisory for mitigations.

References

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