Vulnerability Description
In the Linux kernel before 4.20.2, kernel/sched/fair.c mishandles leaf cfs_rq's, which allows attackers to cause a denial of service (infinite loop in update_blocked_averages) or possibly have unspecified other impact by inducing a high load.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.13, < 4.14.93 |
| Canonical | Ubuntu Linux | 14.04 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux For Real Time | 8 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7dPatchVendor Advisory
- https://access.redhat.com/errata/RHSA-2019:1959Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1971Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2Release NotesVendor Advisory
- https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497dPatchThird Party Advisory
- https://usn.ubuntu.com/4115-1/Third Party Advisory
- https://usn.ubuntu.com/4118-1/Third Party Advisory
- https://usn.ubuntu.com/4211-1/Third Party Advisory
- https://usn.ubuntu.com/4211-2/Third Party Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7dPatchVendor Advisory
- https://access.redhat.com/errata/RHSA-2019:1959Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1971Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2Release NotesVendor Advisory
- https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497dPatchThird Party Advisory
- https://usn.ubuntu.com/4115-1/Third Party Advisory
FAQ
What is CVE-2018-20784?
CVE-2018-20784 is a vulnerability with a CVSS score of 9.8 (CRITICAL). In the Linux kernel before 4.20.2, kernel/sched/fair.c mishandles leaf cfs_rq's, which allows attackers to cause a denial of service (infinite loop in update_blocked_averages) or possibly have unspeci...
How severe is CVE-2018-20784?
CVE-2018-20784 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2018-20784?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Canonical Ubuntu Linux, Redhat Enterprise Linux, Redhat Enterprise Linux For Real Time.