CVE-2022-49031: linux kernel Out-of-bounds Read — Fix

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.

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CVSS v3.1 Score

7.1

HIGH

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

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.8 — 4.9.335
linux	linux_kernel	4.10 — 4.14.301
linux	linux_kernel	4.15 — 4.19.268
linux	linux_kernel	4.20 — 5.4.226
linux	linux_kernel	5.5 — 5.10.158
linux	linux_kernel	5.11 — 5.15.82
linux	linux_kernel	5.16 — 6.0.12
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2022-49031? +

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. It has a CVSS v3.1 base score of 7.1 (HIGH).

How severe is CVE-2022-49031? +

CVE-2022-49031 has a CVSS v3.1 score of 7.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2022-49031? +

CVE-2022-49031 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2022-49031? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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