NULL Pointer Dereference Affecting kernel package, versions <0:4.14.59-68.43.amzn2
Threat Intelligence
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- published27 Sept 2021
- disclosed3 Jul 2018
Introduced: 3 Jul 2018
CVE-2018-13093 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2 kernel to version 0:4.14.59-68.43.amzn2 or higher.
This issue was patched in ALAS2-2018-1051.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
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.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-13093
- https://bugzilla.kernel.org/show_bug.cgi?id=199367
- https://github.com/torvalds/linux/commit/afca6c5b2595fc44383919fba740c194b0b76aff
- https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git/commit/?h=for-next&id=afca6c5b2595fc44383919fba740c194b0b76aff
- https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
- https://access.redhat.com/errata/RHSA-2019:2029
- https://access.redhat.com/errata/RHSA-2019:2043
- https://usn.ubuntu.com/4094-1/
- https://usn.ubuntu.com/4118-1/