CVE-2018-1092

NameCVE-2018-1092
DescriptionThe ext4_iget function in fs/ext4/inode.c in the Linux kernel through 4.15.15 mishandles the case of a root directory with a zero i_links_count, which allows attackers to cause a denial of service (ext4_process_freed_data NULL pointer dereference and OOPS) via a crafted ext4 image.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-1369-1, DSA-4187-1, DSA-4188-1
NVD severityhigh (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)jessie3.16.56-1+deb8u1fixed
jessie (security)3.16.57-2fixed
stretch4.9.110-1fixed
stretch (security)4.9.110-3+deb9u3fixed
buster4.17.14-1fixed
sid4.17.17-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)4.15.17-1high
linuxsourcejessie3.16.56-1highDSA-4187-1
linuxsourcestretch4.9.88-1highDSA-4188-1
linuxsourcewheezy3.2.101-1highDLA-1369-1

Notes

https://bugzilla.kernel.org/show_bug.cgi?id=199179
Fixed by: https://git.kernel.org/linus/8e4b5eae5decd9dfe5a4ee369c22028f90ab4c44

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