UBUNTU-CVE-2018-13093
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.
02 / AFFECTED SOFTWARE
Affected packages
88 explicit affected versions
23 explicit affected versions
191 explicit affected versions
29 explicit affected versions
10 explicit affected versions
1 explicit affected versions
33 explicit affected versions
1 explicit affected versions
1 explicit affected versions
1 explicit affected versions
56 explicit affected versions
10 explicit affected versions
55 explicit affected versions
9 explicit affected versions
27 explicit affected versions
1 explicit affected versions
6 explicit affected versions
23 explicit affected versions
11 explicit affected versions
90 explicit affected versions
2 explicit affected versions
29 explicit affected versions
34 explicit affected versions
121 explicit affected versions
41 explicit affected versions
1 explicit affected versions
1 explicit affected versions
77 explicit affected versions
12 explicit affected versions
21 explicit affected versions
26 explicit affected versions
26 explicit affected versions
99 explicit affected versions
54 explicit affected versions
34 explicit affected versions
21 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://bugzilla.kernel.org/show_bug.cgi?id=199367
- https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git/commit/?h=for-next&id=afca6c5b2595fc44383919fba740c194b0b76aff
- https://github.com/torvalds/linux/commit/afca6c5b2595fc44383919fba740c194b0b76aff
- https://ubuntu.com/security/CVE-2018-13093
- https://ubuntu.com/security/notices/USN-4094-1
- https://ubuntu.com/security/notices/USN-4118-1
- https://ubuntu.com/security/notices/USN-4708-1
- https://ubuntu.com/security/notices/USN-4709-1
- https://www.cve.org/CVERecord?id=CVE-2018-13093