CVE-2022-50653

Summary

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

mmc: atmel-mci: fix return value check of mmc_add_host()

mmc_add_host() may return error, if we ignore its return value, it will lead two issues:

  1. The memory that allocated in mmc_alloc_host() is leaked.
  2. In the remove() path, mmc_remove_host() will be called to delete device, but it's not added yet, it will lead a kernel crash because of null-ptr-deref in device_del().

So fix this by checking the return value and calling mmc_free_host() in the error path.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7d2be0749a59096a334c94dc48f43294193cb8ed < 99a6cdfa2cf05028b52f6d8ee85ccc5f8b71b4a2affected
LinuxLinux7d2be0749a59096a334c94dc48f43294193cb8ed < 6bb26abb92f25e582a0976091a10b539fe3796dbaffected
LinuxLinux7d2be0749a59096a334c94dc48f43294193cb8ed < 00ac0f5f95920f003cd6ece53cdc759549b69118affected
LinuxLinux7d2be0749a59096a334c94dc48f43294193cb8ed < 1925472dec31ec061d57412b3a65a056ea24f340affected
LinuxLinux7d2be0749a59096a334c94dc48f43294193cb8ed < cc8bb436f3c842a86b9082d97933582120d180e2affected
LinuxLinux7d2be0749a59096a334c94dc48f43294193cb8ed < 85946ceb0fac20ab39cdb85333086daf0291a553affected
LinuxLinux7d2be0749a59096a334c94dc48f43294193cb8ed < 9e6e8c43726673ca2abcaac87640b9215fd72f4caffected
LinuxLinux2.6.27affected
LinuxLinux0 < 2.6.27unaffected
LinuxLinux4.19.270 <= 4.19.*unaffected
LinuxLinux5.4.229 <= 5.4.*unaffected
LinuxLinux5.10.163 <= 5.10.*unaffected
LinuxLinux5.15.86 <= 5.15.*unaffected
LinuxLinux6.0.16 <= 6.0.*unaffected
LinuxLinux6.1.2 <= 6.1.*unaffected
LinuxLinux6.2 <= *unaffected

Weaknesses

References