CVE-2018-13093

Description

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.10%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git/commit/?h=for-next&id=afca6c5b2595fc44383919fba740c194b0b76aff third party advisory patch
https://github.com/torvalds/linux/commit/afca6c5b2595fc44383919fba740c194b0b76aff patch
https://bugzilla.kernel.org/show_bug.cgi?id=199367 issue tracking third party advisory
https://access.redhat.com/errata/RHSA-2019:2043 vendor advisory
https://access.redhat.com/errata/RHSA-2019:2029 vendor advisory
https://usn.ubuntu.com/4094-1/ vendor advisory
https://usn.ubuntu.com/4118-1/ vendor advisory
https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html mailing list

Frequently Asked Questions

What is the severity of CVE-2018-13093?
CVE-2018-13093 has been scored as a medium severity vulnerability.
How to fix CVE-2018-13093?
To fix CVE-2018-13093, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-13093 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-13093 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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