Buffer overflow in Linux kernel - CVE-2021-26932

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Main Vulnerability Database Vulnerabilities #VU93670

Buffer overflow in Linux kernel - CVE-2021-26932

Published: July 2, 2024


Vulnerability identifier: #VU93670
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-26932
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory corruption within the gntdev_map_grant_pages() function in drivers/xen/gntdev.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
Amazon Linux AMI
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE CaaS Platform
SUSE MicroOS
SUSE Enterprise Storage
SUSE OpenStack Cloud
HPE Helion Openstack
SUSE OpenStack Cloud Crowbar
FreeBSD
SUSE Linux Enterprise Server for SAP
SUSE Linux Enterprise High Availability
SUSE Linux Enterprise Server
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise Workstation Extension
SUSE Linux Enterprise Real Time Extension
SUSE Linux Enterprise Software Development Kit
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Module for Live Patching
SUSE Linux Enterprise Module for Basesystem
SUSE Linux Enterprise Module for Realtime
SUSE Linux Enterprise Module for Public Cloud
SUSE Linux Enterprise Module for Legacy Software
SUSE Linux Enterprise Module for Development Tools
openEuler
Fedora
kernel-livepatch-4_12_14-150_69-default-debuginfo
kernel-livepatch-4_12_14-150_69-default
kernel-livepatch-4_12_14-197_86-default
kgraft-patch-4_4_121-92_152-default
kgraft-patch-4_4_180-94_141-default-debuginfo
kgraft-patch-4_4_180-94_141-default
kernel-livepatch-SLE15-SP2_Update_11-debugsource
kernel-livepatch-5_3_18-24_52-default-debuginfo
kernel-livepatch-5_3_18-24_52-default
kgraft-patch-4_12_14-95_71-default
kgraft-patch-4_12_14-122_66-default
cluster-md-kmp-default-debuginfo
kernel-default-man
kernel-default
kernel-default-base
kernel-default-base-debuginfo
cluster-md-kmp-default
kernel-default-debuginfo
kernel-default-debugsource
kernel-default-devel
kernel-syms
cluster-network-kmp-default-debuginfo
cluster-network-kmp-default
kernel-devel
kernel-macros
kernel-source
ocfs2-kmp-default-debuginfo
ocfs2-kmp-default
gfs2-kmp-default-debuginfo
gfs2-kmp-default
dlm-kmp-default-debuginfo
dlm-kmp-default
kernel-default-kgraft
kernel-rt_debug-debugsource
kernel-rt_debug-devel
kernel-rt_debug-devel-debuginfo
kernel-syms-rt
ocfs2-kmp-rt
ocfs2-kmp-rt-debuginfo
kernel-devel-rt
kernel-source-rt
kernel-rt_debug-debuginfo
kernel-rt_debug
cluster-md-kmp-rt
cluster-md-kmp-rt-debuginfo
dlm-kmp-rt
dlm-kmp-rt-debuginfo
gfs2-kmp-rt
gfs2-kmp-rt-debuginfo
kernel-rt
kernel-rt-base
kernel-rt-base-debuginfo
kernel-rt-debuginfo
kernel-rt-debugsource
kernel-rt-devel
kernel-rt-devel-debuginfo
kernel-azure-base
kernel-source-azure
kernel-devel-azure
kernel-azure-debuginfo
kernel-azure-base-debuginfo
kernel-azure
kernel-azure-debugsource
kernel-azure-devel
kernel-syms-azure
kernel-default-devel-debuginfo
kernel-default-kgraft-devel
kernel-docs
kernel-obs-build-debugsource
kernel-obs-build
kernel-default-extra-debuginfo
kernel-default-extra
kernel-vanilla-base
kernel-vanilla-base-debuginfo
kernel-vanilla-debuginfo
kernel-vanilla-debugsource
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-default-livepatch
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-default-livepatch-devel
kernel
python3-perf
perf
kernel-tools-debuginfo
kernel-tools-devel
bpftool
python2-perf
python3-perf-debuginfo
python2-perf-debuginfo
kernel-debugsource
perf-debuginfo
kernel-tools
kernel-debuginfo
bpftool-debuginfo
kernel-azure-devel-debuginfo
kernel-preempt-debugsource
kernel-preempt-debuginfo
kernel-preempt-extra-debuginfo
kernel-preempt-extra
kernel-preempt-devel-debuginfo
kernel-preempt
kernel-preempt-devel

How to mitigate CVE-2021-26932

Install update from vendor's website.

kernel-livepatch-4_12_14-150_69-default-debuginfo - update to 1-1.3.1
kernel-livepatch-4_12_14-150_69-default - update to 1-1.3.1
kernel-livepatch-4_12_14-197_86-default - update to 1-3.3.1
kgraft-patch-4_4_121-92_152-default - update to 1-3.3.2
kgraft-patch-4_4_180-94_141-default-debuginfo - update to 1-4.3.2
kgraft-patch-4_4_180-94_141-default - update to 1-4.3.2
kernel-livepatch-SLE15-SP2_Update_11-debugsource - update to 1-5.3.1
kernel-livepatch-5_3_18-24_52-default-debuginfo - update to 1-5.3.1
kernel-livepatch-5_3_18-24_52-default - update to 1-5.3.1
kgraft-patch-4_12_14-95_71-default - update to 1-6.3.1
kgraft-patch-4_12_14-122_66-default - update to 1-8.3.2
cluster-md-kmp-default-debuginfo - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
kernel-default-man - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1
kernel-default - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
kernel-default-base - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1.9.24.1
kernel-default-base-debuginfo - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-197.86.1
cluster-md-kmp-default - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
kernel-default-debuginfo - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
kernel-default-debugsource - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
kernel-default-devel - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
kernel-syms - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
cluster-network-kmp-default-debuginfo - update to 4.4.121-92.152.2
cluster-network-kmp-default - update to 4.4.121-92.152.2
kernel-devel - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
kernel-macros - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
kernel-source - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
ocfs2-kmp-default - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
gfs2-kmp-default-debuginfo - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
gfs2-kmp-default - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
dlm-kmp-default-debuginfo - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
dlm-kmp-default - addressed in versions 4.4.121-92.152.2, 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
kernel-default-kgraft - addressed in versions 4.4.180-94.141.2, 4.12.14-95.71.1, 4.12.14-122.66.2
kernel-rt_debug-debugsource - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
kernel-rt_debug-devel - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
kernel-rt_debug-devel-debuginfo - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
kernel-syms-rt - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
ocfs2-kmp-rt - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
ocfs2-kmp-rt-debuginfo - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
kernel-devel-rt - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
kernel-source-rt - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
kernel-rt_debug-debuginfo - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
kernel-rt_debug - update to 4.12.14-10.37.1
cluster-md-kmp-rt - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
cluster-md-kmp-rt-debuginfo - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
dlm-kmp-rt - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
dlm-kmp-rt-debuginfo - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
gfs2-kmp-rt - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
gfs2-kmp-rt-debuginfo - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
kernel-rt - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
kernel-rt-base - update to 4.12.14-10.37.1
kernel-rt-base-debuginfo - update to 4.12.14-10.37.1
kernel-rt-debuginfo - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
kernel-rt-debugsource - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
kernel-rt-devel - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
kernel-rt-devel-debuginfo - addressed in versions 4.12.14-10.37.1, 5.3.18-28.1
kernel-azure-base - update to 4.12.14-16.50.1
kernel-source-azure - addressed in versions 4.12.14-16.50.1, 5.3.18-18.38.1
kernel-devel-azure - addressed in versions 4.12.14-16.50.1, 5.3.18-18.38.1
kernel-azure-debuginfo - addressed in versions 4.12.14-16.50.1, 5.3.18-18.38.1
kernel-azure-base-debuginfo - update to 4.12.14-16.50.1
kernel-azure - addressed in versions 4.12.14-16.50.1, 5.3.18-18.38.1
kernel-azure-debugsource - addressed in versions 4.12.14-16.50.1, 5.3.18-18.38.1
kernel-azure-devel - addressed in versions 4.12.14-16.50.1, 5.3.18-18.38.1
kernel-syms-azure - addressed in versions 4.12.14-16.50.1, 5.3.18-18.38.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-95.71.1, 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
kernel-default-kgraft-devel - addressed in versions 4.12.14-95.71.1, 4.12.14-122.66.2
kernel-docs - addressed in versions 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
kernel-obs-build-debugsource - addressed in versions 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
kernel-obs-build - addressed in versions 4.12.14-122.66.2, 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
kernel-default-extra-debuginfo - addressed in versions 4.12.14-122.66.2, 5.3.18-24.52.1
kernel-default-extra - addressed in versions 4.12.14-122.66.2, 5.3.18-24.52.1
kernel-vanilla-base - update to 4.12.14-150.69.1
kernel-vanilla-base-debuginfo - update to 4.12.14-150.69.1
kernel-vanilla-debuginfo - update to 4.12.14-150.69.1
kernel-vanilla-debugsource - update to 4.12.14-150.69.1
reiserfs-kmp-default - addressed in versions 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
reiserfs-kmp-default-debuginfo - addressed in versions 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
kernel-default-livepatch - addressed in versions 4.12.14-150.69.1, 4.12.14-197.86.1, 5.3.18-24.52.1
kernel-zfcpdump-debugsource - addressed in versions 4.12.14-150.69.1, 4.12.14-197.86.1
kernel-zfcpdump-debuginfo - addressed in versions 4.12.14-150.69.1, 4.12.14-197.86.1
kernel-default-livepatch-devel - addressed in versions 4.12.14-197.86.1, 5.3.18-24.52.1
kernel - update to 4.14.225-121.357
python3-perf - update to 4.19.90-2103.3.0.0061
perf - update to 4.19.90-2103.3.0.0061
kernel-tools-debuginfo - update to 4.19.90-2103.3.0.0061
kernel-tools-devel - update to 4.19.90-2103.3.0.0061
bpftool - update to 4.19.90-2103.3.0.0061
kernel-source - update to 4.19.90-2103.3.0.0061
python2-perf - update to 4.19.90-2103.3.0.0061
python3-perf-debuginfo - update to 4.19.90-2103.3.0.0061
python2-perf-debuginfo - update to 4.19.90-2103.3.0.0061
kernel-debugsource - update to 4.19.90-2103.3.0.0061
perf-debuginfo - update to 4.19.90-2103.3.0.0061
kernel-tools - update to 4.19.90-2103.3.0.0061
kernel-devel - update to 4.19.90-2103.3.0.0061
kernel-debuginfo - update to 4.19.90-2103.3.0.0061
bpftool-debuginfo - update to 4.19.90-2103.3.0.0061
kernel - update to 4.19.90-2103.3.0.0061
kernel-azure-devel-debuginfo - update to 5.3.18-18.38.1
kernel-preempt-debugsource - update to 5.3.18-24.52.1
kernel-preempt-debuginfo - update to 5.3.18-24.52.1
kernel-preempt-extra-debuginfo - update to 5.3.18-24.52.1
kernel-preempt-extra - update to 5.3.18-24.52.1
kernel-preempt-devel-debuginfo - update to 5.3.18-24.52.1
kernel-preempt - update to 5.3.18-24.52.1
kernel-preempt-devel - update to 5.3.18-24.52.1
kernel - addressed in versions 5.10.18-100.fc32, 5.10.18-200.fc33

External References

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