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.
References (9)
Core 9
Core References
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/3821-1/
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/104917
Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://www.spinics.net/lists/linux-fsdevel/msg130021.html
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/3821-2/
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://bugzilla.kernel.org/show_bug.cgi?id=200297
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2018/dsa-4308
Vendor Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4094-1/
Vendor Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4118-1/
Scores
CVSS v3
5.5
EPSS
0.0026
EPSS Percentile
49.2%
Attack Vector
LOCAL
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Details
CWE
CWE-476
Status
published
Products (5)
canonical/ubuntu_linux
14.04
canonical/ubuntu_linux
16.04
debian/debian_linux
8.0
debian/debian_linux
9.0
linux/linux_kernel
< 4.17.10
Published
Jul 27, 2018
Tracked Since
Feb 18, 2026