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CVE-2022-50485

ext4: add EXT4_IGET_BAD flag to prevent unexpected bad inode PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
Linux / Linuxaffected 393d1d1d76933886d5e1ce603214c9987589c6d5 before 2142dfa1de61e25b83198af0308ec7689cca25d3; affected 393d1d1d76933886d5e1ce603214c9987589c6d5 before c0a738875c2e9c8c3366d792f8bf7fe508d5e5a5; affected 393d1d1d76933886d5e1ce603214c9987589c6d5 before f7e6b5548f915d7aa435d0764d41eacfb49c6e09; affected 393d1d1d76933886d5e1ce603214c9987589c6d5 before f725b290ed79ad61e4f721fee95a287892d8b1ad; affected 393d1d1d76933886d5e1ce603214c9987589c6d5 before 488a5c2bf7543c3cd3f07a025f2e62be91599430; affected 393d1d1d76933886d5e1ce603214c9987589c6d5 before 63b1e9bccb71fe7d7e3ddc9877dbdc85e5d2d023
Linux / Linuxaffected 3.10; unaffected 0 before 3.10; unaffected 5.4.229 through 5.4.*; unaffected 5.10.163 through 5.10.*; unaffected 5.15.87 through 5.15.*; unaffected 6.0.18 through 6.0.*; unaffected 6.1.4 through 6.1.*; unaffected 6.2 through *

CWE

No CWE identifiers supplied.

References