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CVE-2018-14617

Description

An issue was discovered in the Linux kernel through 4.17.10. There is a NULL pointer dereference and panic in hfsplus_lookup() in fs/hfsplus/dir.c when opening a file (that is purportedly a hard link) in an hfs+ filesystem that has malformed catalog data, and is mounted read-only without a metadata directory.

POC

Reference

- https://bugzilla.kernel.org/show_bug.cgi?id=200297

- https://usn.ubuntu.com/3821-1/

- https://usn.ubuntu.com/3821-2/

- https://usn.ubuntu.com/4118-1/

Github

No PoCs found on GitHub currently.