CVE-2022-50251

Summary

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

mmc: vub300: fix return value check of mmc_add_host()

mmc_add_host() may return error, if we ignore its return value, the memory that allocated in mmc_alloc_host() will be leaked and it will lead a kernel crash because of deleting not added device in the remove path.

So fix this by checking the return value and goto error path which will call mmc_free_host(), besides, the timer added before mmc_add_host() needs be del.

And this patch fixes another missing call mmc_free_host() if usb_control_msg() fails.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux88095e7b473a3d9ec3b9c60429576e9cbd327c89 < 41ed46bdbd2878cd6567abe0974a445f8b1b8ec8affected
LinuxLinux88095e7b473a3d9ec3b9c60429576e9cbd327c89 < 25f05d762ca5e1c685002a53dd44f68e78ca3febaffected
LinuxLinux88095e7b473a3d9ec3b9c60429576e9cbd327c89 < a46e681151bbdacdf6b89ee8c4e5bad0555142bbaffected
LinuxLinux88095e7b473a3d9ec3b9c60429576e9cbd327c89 < 3b29f8769d32016b2d89183db4d80c7a71b7e35eaffected
LinuxLinux88095e7b473a3d9ec3b9c60429576e9cbd327c89 < 3049a3b927a40d89d4582ff1033cd7953be773c7affected
LinuxLinux88095e7b473a3d9ec3b9c60429576e9cbd327c89 < afc898019e7bf18c5eb7a0ac19852fcb1b341b3caffected
LinuxLinux88095e7b473a3d9ec3b9c60429576e9cbd327c89 < c9e85979b59cb86f0a15defa8199d740e2b36b90affected
LinuxLinux88095e7b473a3d9ec3b9c60429576e9cbd327c89 < 2044b2ea77945f372ef161d1bbf814e471767ff2affected
LinuxLinux88095e7b473a3d9ec3b9c60429576e9cbd327c89 < 0613ad2401f88bdeae5594c30afe318e93b14676affected
LinuxLinux3.0affected
LinuxLinux0 < 3.0unaffected
LinuxLinux4.9.337 <= 4.9.*unaffected
LinuxLinux4.14.303 <= 4.14.*unaffected
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