CVE-2022-49032

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < 68de7da092f38395dde523f2e5db26eba6c23e28affected
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < 113c08030a89aaf406f8a1d4549d758a67c2afbaaffected
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < f5575041ec15310bdc50c42b8b22118cc900226eaffected
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < 3f566b626029ca8598d48e5074e56bb37399ca1baffected
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < 5eb114f55b37dbc0487aa9c1913b81bb7837f1c4affected
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < f7419fc42afc035f6b29ce713e17dcd2000c833faffected
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < d45d9f45e7b1365fd0d9bf14680d6d5082a590d1affected
LinuxLinuxb36e8257641a043764c62240316610c81e36376c < fc92d9e3de0b2d30a3ccc08048a5fad533e4672baffected
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