Critical severity9.8NVD Advisory· Published Feb 22, 2019· Updated Jun 17, 2026
CVE-2018-20784
CVE-2018-20784
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
36- Range: <4.20.2
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*+ 2 more
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_for_real_time:8:*:*:*:*:*:*:*
- osv-coords27 versionspkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/kernel-syms&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/kgraft-patch-SLE12-SP3_Update_45&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/kernel-default&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/kernel-source&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/kernel-source&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2012%20SP3pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/kgraft-patch-SLE12-SP3_Update_45&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/kgraft-patch-SLE12-SP3_Update_45&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/kernel-syms&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/kernel-syms&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/kgraft-patch-SLE12-SP3_Update_45&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/kgraft-patch-SLE12-SP3_Update_45&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/kernel-source&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/kernel-default&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/kernel-default&distro=HPE%20Helion%20OpenStack%208
< 4.4.121-92.175.2+ 26 more
- (no CPE)range: < 4.4.121-92.175.2
- (no CPE)range: < 4.4.121-92.175.2
- (no CPE)range: < 4.4.180-94.164.3
- (no CPE)range: < 4.4.180-94.164.2
- (no CPE)range: < 4.4.180-94.164.3
- (no CPE)range: < 4.4.121-92.175.2
- (no CPE)range: < 4.4.180-94.164.2
- (no CPE)range: < 1-4.3.2
- (no CPE)range: < 4.4.180-94.164.3
- (no CPE)range: < 4.4.180-94.164.2
- (no CPE)range: < 4.4.180-94.164.2
- (no CPE)range: < 4.4.180-94.164.3
- (no CPE)range: < 4.4.180-94.164.2
- (no CPE)range: < 1-4.3.2
- (no CPE)range: < 4.4.180-94.164.3
- (no CPE)range: < 4.4.180-94.164.2
- (no CPE)range: < 1-4.3.2
- (no CPE)range: < 4.4.180-94.164.2
- (no CPE)range: < 4.4.180-94.164.2
- (no CPE)range: < 4.4.180-94.164.2
- (no CPE)range: < 1-4.3.2
- (no CPE)range: < 4.4.180-94.164.2
- (no CPE)range: < 1-4.3.2
- (no CPE)range: < 4.4.180-94.164.2
- (no CPE)range: < 4.4.180-94.164.3
- (no CPE)range: < 4.4.180-94.164.2
- (no CPE)range: < 4.4.180-94.164.3
Patches
Vulnerability mechanics
References
9- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/nvdPatchVendor Advisory
- github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497d0nvdPatchThird Party Advisory
- access.redhat.com/errata/RHSA-2019:1959nvdThird Party Advisory
- access.redhat.com/errata/RHSA-2019:1971nvdThird Party Advisory
- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2nvdRelease NotesVendor Advisory
- usn.ubuntu.com/4115-1/nvdThird Party Advisory
- usn.ubuntu.com/4118-1/nvdThird Party Advisory
- usn.ubuntu.com/4211-1/nvdThird Party Advisory
- usn.ubuntu.com/4211-2/nvdThird Party Advisory
News mentions
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