CVE-2018-18690: Medium severity Linux Linux kernel vulnerability
In the Linux kernel before 4.17, a local attacker able to set attributes on an xfs filesystem could make this filesystem non-operational until the next mount by triggering an unchecked error condition during an xfs attribute change, because xfsattrshortformaddname in fs/xfs/libxfs/xfsattr.c mishandles ATTRREPLACE operations with conversion of an attr from short to long form.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.223-1Fixed in 5.10.262-1Fixed in 6.1.176-1Fixed in 6.1.180-1Fixed in 6.12.94-1Fixed in 6.12.101-1Fixed in 7.1.8-1Fixed in 7.1.8-2 - Upgrade
Upgrade
Linux kernelto a version that resolves this vulnerability.Fixed in 4.17
Event History
Frequently Asked Questions
What is the severity of CVE-2018-18690?
CVE-2018-18690 is classified as a moderate severity vulnerability due to its potential impact on filesystem operations.
How do I fix CVE-2018-18690?
To fix CVE-2018-18690, upgrade to a kernel version that is 4.17 or newer.
Which systems are affected by CVE-2018-18690?
CVE-2018-18690 affects Linux kernel versions prior to 4.17 as well as specific Ubuntu and Debian releases.
What is the nature of the issue in CVE-2018-18690?
CVE-2018-18690 involves an unchecked error condition during an xfs attribute change, which can render the filesystem non-operational.
Can CVE-2018-18690 be exploited locally?
Yes, CVE-2018-18690 can be exploited by a local attacker with the ability to set attributes on an xfs filesystem.