CVE-2022-49524

Summary

In the Linux kernel, the following vulnerability has been resolved:

media: pci: cx23885: Fix the error handling in cx23885_initdev()

When the driver fails to call the dma_set_mask(), the driver will get the following splat:

[ 55.853884] BUG: KASAN: use-after-free in __process_removed_driver+0x3c/0x240 [ 55.854486] Read of size 8 at addr ffff88810de60408 by task modprobe/590 [ 55.856822] Call Trace: [ 55.860327] __process_removed_driver+0x3c/0x240 [ 55.861347] bus_for_each_dev+0x102/0x160 [ 55.861681] i2c_del_driver+0x2f/0x50

This is because the driver has initialized the i2c related resources in cx23885_dev_setup() but not released them in error handling, fix this bug by modifying the error path that jumps after failing to call the dma_set_mask().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux2bc46b3ad3c15165f91459b07ff8682478683194 < 6041d1a0365baa729b6adfb6ed5386d9388018dbaffected
LinuxLinux2bc46b3ad3c15165f91459b07ff8682478683194 < 7b9978e1c94e569d65a0e7e719abb9340f5db4a0affected
LinuxLinux2bc46b3ad3c15165f91459b07ff8682478683194 < fa636e9ee4442215cd9a2e079cd5a8e1fe0cb8baaffected
LinuxLinux2bc46b3ad3c15165f91459b07ff8682478683194 < ca17e7a532d1a55466cc007b3f4d319541a27493affected
LinuxLinux2bc46b3ad3c15165f91459b07ff8682478683194 < 98106f100f50c487469903b9cf6d966785fc9cc3affected
LinuxLinux2bc46b3ad3c15165f91459b07ff8682478683194 < 86bd6a579c6c60547706cabf299cd2c9feab3332affected
LinuxLinux2bc46b3ad3c15165f91459b07ff8682478683194 < 453514a874c78df1e7804e6e3aaa60c8d8deb6a8affected
LinuxLinux2bc46b3ad3c15165f91459b07ff8682478683194 < e8123311cf06d7dae71e8c5fe78e0510d20cd30baffected
LinuxLinux4.8affected
LinuxLinux0 < 4.8unaffected
LinuxLinux4.14.283 <= 4.14.*unaffected
LinuxLinux4.19.247 <= 4.19.*unaffected
LinuxLinux5.4.198 <= 5.4.*unaffected
LinuxLinux5.10.121 <= 5.10.*unaffected
LinuxLinux5.15.46 <= 5.15.*unaffected
LinuxLinux5.17.14 <= 5.17.*unaffected
LinuxLinux5.18.3 <= 5.18.*unaffected
LinuxLinux5.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References