CVE-2022-50485

Summary

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

ext4: add EXT4_IGET_BAD flag to prevent unexpected bad inode

There are many places that will get unhappy (and crash) when ext4_iget() returns a bad inode. However, if iget the boot loader inode, allows a bad inode to be returned, because the inode may not be initialized. This mechanism can be used to bypass some checks and cause panic. To solve this problem, we add a special iget flag EXT4_IGET_BAD. Only with this flag we'd be returning bad inode from ext4_iget(), otherwise we always return the error code if the inode is bad inode.(suggested by Jan Kara)

Affected Software

VendorProductVersion RangeStatus
LinuxLinux393d1d1d76933886d5e1ce603214c9987589c6d5 < 2142dfa1de61e25b83198af0308ec7689cca25d3affected
LinuxLinux393d1d1d76933886d5e1ce603214c9987589c6d5 < c0a738875c2e9c8c3366d792f8bf7fe508d5e5a5affected
LinuxLinux393d1d1d76933886d5e1ce603214c9987589c6d5 < f7e6b5548f915d7aa435d0764d41eacfb49c6e09affected
LinuxLinux393d1d1d76933886d5e1ce603214c9987589c6d5 < f725b290ed79ad61e4f721fee95a287892d8b1adaffected
LinuxLinux393d1d1d76933886d5e1ce603214c9987589c6d5 < 488a5c2bf7543c3cd3f07a025f2e62be91599430affected
LinuxLinux393d1d1d76933886d5e1ce603214c9987589c6d5 < 63b1e9bccb71fe7d7e3ddc9877dbdc85e5d2d023affected
LinuxLinux3.10affected
LinuxLinux0 < 3.10unaffected
LinuxLinux5.4.229 <= 5.4.*unaffected
LinuxLinux5.10.163 <= 5.10.*unaffected
LinuxLinux5.15.87 <= 5.15.*unaffected
LinuxLinux6.0.18 <= 6.0.*unaffected
LinuxLinux6.1.4 <= 6.1.*unaffected
LinuxLinux6.2 <= *unaffected

Weaknesses

References