CVE-2022-49634

Summary

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

sysctl: Fix data-races in proc_dou8vec_minmax().

A sysctl variable is accessed concurrently, and there is always a chance of data-race. So, all readers and writers need some basic protection to avoid load/store-tearing.

This patch changes proc_dou8vec_minmax() to use READ_ONCE() and WRITE_ONCE() internally to fix data-races on the sysctl side. For now, proc_dou8vec_minmax() itself is tolerant to a data-race, but we still need to add annotations on the other subsystem's side.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux389dab6142d742f91010f38de0f1f2f440b97e1b < f177b382c33900d0e5a9766493c11a1074076f78affected
LinuxLinuxcb9444130662c6c13022579c861098f212db2562 < e58b02e445463065b4078bf621561da75197853faffected
LinuxLinuxcb9444130662c6c13022579c861098f212db2562 < 5f776daef0b5354615ec4b4234cd9539ca05f273affected
LinuxLinuxcb9444130662c6c13022579c861098f212db2562 < 7dee5d7747a69aa2be41f04c6a7ecfe3ac8cdf18affected
LinuxLinux5.13affected
LinuxLinux0 < 5.13unaffected
LinuxLinux5.15.56 <= 5.15.*unaffected
LinuxLinux5.18.13 <= 5.18.*unaffected
LinuxLinux5.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References