CVE-2022-49032: linux kernel Out-of-bounds Read — Fix

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.

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

Frequently Asked Questions

What is CVE-2022-49032? +

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

How severe is CVE-2022-49032? +

CVE-2022-49032 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-2022-49032? +

CVE-2022-49032 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-2022-49032? +

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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