CVE-2022-49493

Summary

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

ASoC: rt5645: Fix errorenous cleanup order

There is a logic error when removing rt5645 device as the function rt5645_i2c_remove() first cancel the &rt5645->jack_detect_work and delete the &rt5645->btn_check_timer latter. However, since the timer handler rt5645_btn_check_callback() will re-queue the jack_detect_work, this cleanup order is buggy.

That is, once the del_timer_sync in rt5645_i2c_remove is concurrently run with the rt5645_btn_check_callback, the canceled jack_detect_work will be rescheduled again, leading to possible use-after-free.

This patch fix the issue by placing the del_timer_sync function before the cancel_delayed_work_sync.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 < 236d29c5857f02e0a53fdf15d3dce1536c4322ceaffected
LinuxLinuxa6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 < 0941150100173d4eaf3fe08ff4b16740e7c3026faffected
LinuxLinuxa6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 < abe7554da62cb489712a54de69ef5665c250e564affected
LinuxLinuxa6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 < 1a5a3dfd9f172dcb115072f0aea5e27d3083c20eaffected
LinuxLinuxa6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 < 061a6159cea583f1155f67d1915917a6b9282662affected
LinuxLinuxa6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 < 88c09e4812d72c3153afc8e5a45ecac2d0eae3ffaffected
LinuxLinuxa6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 < 453f0920ffc1a28e28ddb9c3cd5562472b2895b0affected
LinuxLinuxa6ff8ddcf3f38ec84337e5e7eb3e0e9a73754cf5 < 2def44d3aec59e38d2701c568d65540783f90f2faffected
LinuxLinux4.13affected
LinuxLinux0 < 4.13unaffected
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