Unrated severityNVD Advisory· Published May 26, 2021· Updated Sep 16, 2024

Improper memory handling in Linux KVM

CVE-2021-22543

Description

An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

242

Red Hat/Kvmllm-fuzzy
osv-coords240 versions
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pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5 pkg:rpm/suse/kernel-syms&distro=SUSE%20OpenStack%20Cloud%209 pkg:rpm/suse/kernel-syms&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209 pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5 pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP2 pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/kgraft-patch-SLE12-SP4_Update_16&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP4 pkg:rpm/suse/kgraft-patch-SLE12-SP4_Update_17&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP4 pkg:rpm/suse/kgraft-patch-SLE12-SP4_Update_18&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP4 pkg:rpm/suse/kgraft-patch-SLE12-SP4_Update_19&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP4 pkg:rpm/suse/kgraft-patch-SLE12-SP4_Update_20&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP4 pkg:rpm/suse/kgraft-patch-SLE12-SP4_Update_21&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP4 pkg:rpm/suse/kgraft-patch-SLE12-SP4_Update_22&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP4 pkg:rpm/suse/kgraft-patch-SLE12-SP4_Update_23&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP4 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_10&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_11&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_12&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_13&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_14&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_15&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_16&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_17&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_18&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_19&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_20&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_21&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_22&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_66&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_8&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_9&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5
< 4.18.0-305.12.1.el8_4+ 239 more
- (no CPE)range: < 4.18.0-305.12.1.el8_4
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-38.17.1
- (no CPE)range: < 5.3.18-lp152.87.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-lp152.87.1.lp152.8.40.1
- (no CPE)range: < 5.3.18-59.19.1.18.10.1
- (no CPE)range: < 5.3.18-lp152.87.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-lp152.87.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-lp152.87.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-lp152.87.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-lp152.87.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-lp152.87.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-38.17.1
- (no CPE)range: < 5.3.18-lp152.87.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-38.17.1
- (no CPE)range: < 5.3.18-lp152.87.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-18.61.1
- (no CPE)range: < 5.3.18-38.17.1
- (no CPE)range: < 4.12.14-16.68.1
- (no CPE)range: < 4.12.14-16.68.1
- (no CPE)range: < 5.3.18-24.78.1.9.36.1
- (no CPE)range: < 5.3.18-24.78.1.9.36.1
- (no CPE)range: < 5.3.18-59.19.1.18.10.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.83.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 5.3.18-24.78.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.83.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 5.3.18-24.78.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-24.78.1
- (no CPE)range: < 5.3.18-24.78.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-24.78.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.83.1
- (no CPE)range: < 4.12.14-122.250.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.83.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-122.250.1
- (no CPE)range: < 4.12.14-122.83.1
- (no CPE)range: < 5.3.18-24.78.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 5.3.18-24.78.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-122.83.1
- (no CPE)range: < 14-2.2
- (no CPE)range: < 13-2.2
- (no CPE)range: < 12-2.2
- (no CPE)range: < 11-2.2
- (no CPE)range: < 11-2.2
- (no CPE)range: < 10-2.2
- (no CPE)range: < 10-2.2
- (no CPE)range: < 10-2.2
- (no CPE)range: < 9-2.2
- (no CPE)range: < 8-2.2
- (no CPE)range: < 5-2.1
- (no CPE)range: < 4-2.1
- (no CPE)range: < 2-2.1
- (no CPE)range: < 1-3.3.1
- (no CPE)range: < 9-2.2
- (no CPE)range: < 8-2.2
- (no CPE)range: < 5-2.1
- (no CPE)range: < 5-2.1
- (no CPE)range: < 3-2.1
- (no CPE)range: < 3-2.1
- (no CPE)range: < 3-2.1
- (no CPE)range: < 2-2.1
- (no CPE)range: < 1-5.3.1
- (no CPE)range: < 13-2.2
- (no CPE)range: < 13-2.2
- (no CPE)range: < 13-2.2
- (no CPE)range: < 11-2.2
- (no CPE)range: < 11-2.2
- (no CPE)range: < 11-2.2
- (no CPE)range: < 10-2.2
- (no CPE)range: < 10-2.2
- (no CPE)range: < 5-3.1
- (no CPE)range: < 3-2.1
- (no CPE)range: < 3-2.1
- (no CPE)range: < 3-2.1
- (no CPE)range: < 2-2.1
- (no CPE)range: < 1-7.3.1
- (no CPE)range: < 13-2.2
- (no CPE)range: < 11-2.2
- (no CPE)range: < 9-2.2
- (no CPE)range: < 8-2.2
- (no CPE)range: < 5-2.1
- (no CPE)range: < 2-2.1
- (no CPE)range: < 1-1.3.1
- (no CPE)range: < 4.12.14-197.102.1
- (no CPE)range: < 4.12.14-197.102.1
- (no CPE)range: < 4.12.14-197.102.1
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 5.3.18-24.78.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 4.12.14-197.102.1
- (no CPE)range: < 4.12.14-197.102.1
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 4.12.14-197.102.1
- (no CPE)range: < 4.12.14-122.83.1
- (no CPE)range: < 5.3.18-24.78.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-24.78.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-24.78.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 4.12.14-10.54.1
- (no CPE)range: < 5.3.18-48.1
- (no CPE)range: < 5.3.18-48.1
- (no CPE)range: < 4.12.14-10.54.1
- (no CPE)range: < 5.3.18-48.1
- (no CPE)range: < 5.3.18-18.61.1
- (no CPE)range: < 5.3.18-38.17.1
- (no CPE)range: < 4.12.14-16.68.1
- (no CPE)range: < 4.12.14-16.68.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 5.3.18-24.78.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 5.3.18-24.78.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.83.1
- (no CPE)range: < 4.12.14-122.250.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.83.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-122.250.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-10.54.1
- (no CPE)range: < 5.3.18-48.1
- (no CPE)range: < 5.3.18-18.61.1
- (no CPE)range: < 5.3.18-38.17.1
- (no CPE)range: < 4.12.14-16.68.1
- (no CPE)range: < 4.12.14-16.68.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 5.3.18-24.78.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.83.1
- (no CPE)range: < 4.12.14-122.250.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.83.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-122.250.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-10.54.1
- (no CPE)range: < 5.3.18-48.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 5.3.18-59.19.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 13-2.2
- (no CPE)range: < 10-2.2
- (no CPE)range: < 9-2.2
- (no CPE)range: < 8-2.2
- (no CPE)range: < 5-2.1
- (no CPE)range: < 4-2.1
- (no CPE)range: < 2-2.1
- (no CPE)range: < 1-6.3.1
- (no CPE)range: < 14-2.2
- (no CPE)range: < 12-2.2
- (no CPE)range: < 12-2.2
- (no CPE)range: < 10-2.2
- (no CPE)range: < 10-2.2
- (no CPE)range: < 9-2.2
- (no CPE)range: < 8-2.2
- (no CPE)range: < 6-2.1
- (no CPE)range: < 5-2.1
- (no CPE)range: < 3-2.1
- (no CPE)range: < 3-2.1
- (no CPE)range: < 2-2.1
- (no CPE)range: < 1-8.3.1
- (no CPE)range: < 1-8.3.1
- (no CPE)range: < 16-2.2
- (no CPE)range: < 15-2.2
Linux/Kernelcpe-rescue
Range: add6a0cd1c5ba51b201e1361b05a5df817083618

Patches

Vulnerability mechanics

References

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4G5YBUVEPHZYXMKNGBZ3S6INFCTEEL4E/mitrevendor-advisoryx_refsource_FEDORA
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ROQIXQB7ZAWI3KSGSHR6H5RDUWZI775S/mitrevendor-advisoryx_refsource_FEDORA
www.openwall.com/lists/oss-security/2021/06/26/1mitremailing-listx_refsource_MLIST
github.com/google/security-research/security/advisories/GHSA-7wq5-phmq-m584mitrex_refsource_MISC
lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlmitremailing-listx_refsource_MLIST
lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlmitremailing-listx_refsource_MLIST
security.netapp.com/advisory/ntap-20210708-0002/mitrex_refsource_CONFIRM

News mentions

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cvss	0.000
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000