Critical severity · published Feb 22, 2019
CVE-2018-20784
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…
9.8
CVSS
4.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.2% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
4.13 before 4.14.93; 4.19 before 4.19.15; 4.20 before 4.20.2; 5.0 · source: NVD
EL
Enterprise Linux · Redhat
8.0 · source: NVD
EL
Enterprise Linux For Real Time · Redhat
8 · source: NVD
UL
Ubuntu Linux · Canonical
14.04; 16.04; 18.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-20784
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-20784
Patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7d74c741a907cfaeb73a7697081881c497d0
Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1959
Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1971
Release Notes
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2
Patch
https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497d0
Third Party Advisory
https://usn.ubuntu.com/4115-1/
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