CVE-2022-49031

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < 98afcb5f3be645d330c74c5194ba0d80e26f95e0affected
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < c9268df36818ee4eaaaeadc80009b442a5ca69c9affected
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < 726fa3e4ab97dcff1c745bdc4fb137366cb8d3dfaffected
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < 2d6a437064ffbe685c67ddb16dfc0946074c6c3faffected
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < b1756af172fb80a3edc143772d49e166ec691b6caffected
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < e7e76a77aabef8989cbc0a8417af1aa040620867affected
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < 06c6ce21cec77dfa860d57e7a006000a57812efbaffected
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < 58143c1ed5882c138a3cd2251a336fc8755f23d9affected
LinuxLinux4.8affected
LinuxLinux0 < 4.8unaffected
LinuxLinux4.9.335 <= 4.9.*unaffected
LinuxLinux4.14.301 <= 4.14.*unaffected
LinuxLinux4.19.268 <= 4.19.*unaffected
LinuxLinux5.4.226 <= 5.4.*unaffected
LinuxLinux5.10.158 <= 5.10.*unaffected
LinuxLinux5.15.82 <= 5.15.*unaffected
LinuxLinux6.0.12 <= 6.0.*unaffected
LinuxLinux6.1 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References