CVE-2022-50618

Summary

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

mmc: meson-gx: 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().

Fix this by checking the return value and goto error path which will call mmc_free_host().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux51c5d8447bd71b7e539c19c46a03b73c0e91fa66 < f5506e0bbb25102bd8ef2e1a3b483a0b934e454eaffected
LinuxLinux51c5d8447bd71b7e539c19c46a03b73c0e91fa66 < 9e11c6bb745be4e9b325cf96031b4ea34801342daffected
LinuxLinux51c5d8447bd71b7e539c19c46a03b73c0e91fa66 < 64b2c441171febf075bd9632aca579afda8ab9fbaffected
LinuxLinux51c5d8447bd71b7e539c19c46a03b73c0e91fa66 < e0cfe7aa41f3965f5224affd88afd48c60f6ad1faffected
LinuxLinux51c5d8447bd71b7e539c19c46a03b73c0e91fa66 < 42343e3c6195e934b9cb4c08b7ff84a3778d77f9affected
LinuxLinux51c5d8447bd71b7e539c19c46a03b73c0e91fa66 < f5ce76aeddf01ca8f2a80fc37119388d59db7c10affected
LinuxLinux51c5d8447bd71b7e539c19c46a03b73c0e91fa66 < 90935f16f2650ab7416fa2ffbe5c28cb39cf3f1eaffected
LinuxLinux4.10affected
LinuxLinux0 < 4.10unaffected
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