NULL pointer dereference and panic in lookup_slow() due to lack of validation in cached inodes allocation

NULL pointer dereference and panic in lookup_slow() due to lack of validation in cached inodes allocation

CVE-2018-13093 · MEDIUM Severity

AV:N/AC:M/AU:N/C:N/I:N/A:P

An issue was discovered in fs/xfs/xfs_icache.c in the Linux kernel through 4.17.3. There is a NULL pointer dereference and panic in lookup_slow() on a NULL inode->i_ops pointer when doing pathwalks on a corrupted xfs image. This occurs because of a lack of proper validation that cached inodes are free during allocation.

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