Use-after-free in Linux kernel - CVE-2021-4028

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Main Vulnerability Database Vulnerabilities #VU60797

Use-after-free in Linux kernel - CVE-2021-4028

Published: February 22, 2022


Vulnerability identifier: #VU60797
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-4028
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in the RDMA listen() function in Linux kernel. A local user can run a specially crafted program to trigger a use-after-free error and execute arbitrary code with elevated privileges.



Affected software

Linux kernel
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Server
Anolis OS
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
SUSE Linux Enterprise Module for Live Patching
elfutils (Red Hat package)
kpatch-patch-3_10_0-1160_31_1 (Red Hat package)
kpatch-patch-3_10_0-957_76_1 (Red Hat package)
kpatch-patch-3_10_0-957_72_1 (Red Hat package)
kpatch-patch-3_10_0-1160_24_1 (Red Hat package)
kpatch-patch-3_10_0-1160_25_1 (Red Hat package)
kpatch-patch-3_10_0-1160_36_2 (Red Hat package)
kpatch-patch-3_10_0-1160_41_1 (Red Hat package)
kpatch-patch-3_10_0-1160_42_2 (Red Hat package)
kpatch-patch-3_10_0-957_78_2 (Red Hat package)
kpatch-patch-3_10_0-1160_45_1 (Red Hat package)
kpatch-patch-3_10_0-957_80_1 (Red Hat package)
kpatch-patch-3_10_0-957_84_1 (Red Hat package)
kpatch-patch-3_10_0-957_86_1 (Red Hat package)
kpatch-patch-3_10_0-957_88_1 (Red Hat package)
kpatch-patch-4_18_0-348 (Red Hat package)
kpatch-patch-4_18_0-147_57_1 (Red Hat package)
kpatch-patch-4_18_0-147_48_1 (Red Hat package)
kpatch-patch-4_18_0-147_51_1 (Red Hat package)
kpatch-patch-4_18_0-193_60_2 (Red Hat package)
kpatch-patch-4_18_0-193_56_1 (Red Hat package)
kpatch-patch-4_18_0-193_68_1 (Red Hat package)
kpatch-patch-4_18_0-193_64_1 (Red Hat package)
kpatch-patch-4_18_0-193_65_2 (Red Hat package)
kpatch-patch-4_18_0-193_51_1 (Red Hat package)
kpatch-patch-4_18_0-305_3_1 (Red Hat package)
kpatch-patch-4_18_0-305_19_1 (Red Hat package)
kpatch-patch-4_18_0-305_17_1 (Red Hat package)
kpatch-patch-4_18_0-305_7_1 (Red Hat package)
kpatch-patch-4_18_0-348_2_1 (Red Hat package)
kpatch-patch-4_18_0-348_7_1 (Red Hat package)
kpatch-patch-4_18_0-348_12_2 (Red Hat package)
kpatch-patch-4_18_0-305 (Red Hat package)
kpatch-patch-4_18_0-147_54_2 (Red Hat package)
kpatch-patch-4_18_0-147_56_1 (Red Hat package)
kpatch-patch-4_18_0-305_25_1 (Red Hat package)
kpatch-patch-4_18_0-305_30_1 (Red Hat package)
kpatch-patch-4_18_0-305_28_1 (Red Hat package)
kpatch-patch-4_18_0-305_12_1 (Red Hat package)
imgbased (Red Hat package)
kpatch-patch-4_18_0-147_52_1 (Red Hat package)
kpatch-patch-4_18_0-147_44_1 (Red Hat package)
kpatch-patch-4_18_0-193_46_1 (Red Hat package)
kpatch-patch-4_18_0-193_47_1 (Red Hat package)
kpatch-patch-4_18_0-305_10_2 (Red Hat package)
kpatch-patch-4_18_0-147_51_2 (Red Hat package)
kernel (Red Hat package)
redhat-release-virtualization-host (Red Hat package)
redhat-virtualization-host (Red Hat package)
kernel-rt (Red Hat package)
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
kpatch-patch-3_10_0-1160_59_1 (Red Hat package)
kpatch-patch-3_10_0-957_92_1 (Red Hat package)
kpatch-patch-4_18_0-147_58_1 (Red Hat package)
kpatch-patch-4_18_0-147_59_1 (Red Hat package)
kpatch-patch-4_18_0-193_71_1 (Red Hat package)
kpatch-patch-4_18_0-193_70_1 (Red Hat package)
kpatch-patch-4_18_0-305_34_2 (Red Hat package)
kpatch-patch-4_18_0-348_20_1 (Red Hat package)
kpatch-patch-3_10_0-1160_49_1 (Red Hat package)
kpatch-patch-3_10_0-1160_53_1 (Red Hat package)
kernel-headers
kernel-doc
bpftool
kernel
kernel-debug
kernel-debug-devel
kernel-devel
kernel-abi-whitelists
python-perf
kernel-tools-libs-devel
kernel-tools
kernel-tools-libs
perf
redhat-virtualization-host-productimg (Red Hat package)
ovirt-node-ng (Red Hat package)
kernel-debug-modules
kernel-debug-core
kernel-cross-headers
kernel-core
kernel-debug-modules-extra
kernel-modules
kernel-modules-extra
python3-perf
kernel-livepatch-SLE15-SP3_Update_7-debugsource
kernel-livepatch-5_3_18-59_24-default
kernel-livepatch-5_3_18-59_24-default-debuginfo
kernel-livepatch-5_3_18-59_27-default
kernel-livepatch-5_3_18-59_27-default-debuginfo
kernel-livepatch-SLE15-SP3_Update_6-debugsource
kernel-livepatch-SLE15-SP3_Update_5-debugsource
kernel-livepatch-5_3_18-59_19-default
kernel-livepatch-5_3_18-59_19-default-debuginfo
kernel-livepatch-5_3_18-59_16-default
kernel-livepatch-5_3_18-59_16-default-debuginfo
kernel-livepatch-SLE15-SP3_Update_4-debugsource
kernel-livepatch-5_3_18-59_13-default
kernel-livepatch-5_3_18-59_13-default-debuginfo
kernel-livepatch-5_3_18-59_5-default
kernel-livepatch-5_3_18-59_5-default-debuginfo
kernel-livepatch-SLE15-SP3_Update_1-debugsource
kernel-livepatch-SLE15-SP3_Update_3-debugsource
kernel-livepatch-SLE15-SP3_Update_2-debugsource
kernel-livepatch-5_3_18-59_10-default-debuginfo
kernel-livepatch-5_3_18-59_10-default
kernel-livepatch-SLE15-SP3_Update_0-debugsource
kernel-livepatch-5_3_18-57-default-debuginfo
kernel-livepatch-5_3_18-57-default
Red Hat Virtualization
Red Hat Virtualization Host
Traffix SDC
Migration Toolkit for Containers
OpenShift Logging
Red Hat Advanced Cluster Management for Kubernetes
IBM Spectrum Protect Plus

How to mitigate CVE-2021-4028

Install updates from vendor's website.

Linux kernel - update to 5.15 rc1
elfutils (Red Hat package) - update to 0.186-1.el8
kpatch-patch-3_10_0-1160_31_1 (Red Hat package) - update to 1-7.el7
kpatch-patch-3_10_0-957_76_1 (Red Hat package) - update to 1-7.el7
kpatch-patch-3_10_0-957_72_1 (Red Hat package) - update to 1-7.el7
kpatch-patch-3_10_0-1160_24_1 (Red Hat package) - update to 1-8.el7
kpatch-patch-3_10_0-1160_25_1 (Red Hat package) - update to 1-8.el7
kpatch-patch-3_10_0-1160_36_2 (Red Hat package) - update to 1-6.el7
kpatch-patch-3_10_0-1160_41_1 (Red Hat package) - update to 1-5.el7
kpatch-patch-3_10_0-1160_42_2 (Red Hat package) - update to 1-4.el7
kpatch-patch-3_10_0-957_78_2 (Red Hat package) - update to 1-6.el7
kpatch-patch-3_10_0-1160_45_1 (Red Hat package) - update to 1-3.el7
kpatch-patch-3_10_0-957_80_1 (Red Hat package) - update to 1-5.el7
kpatch-patch-3_10_0-957_84_1 (Red Hat package) - update to 1-4.el7
kpatch-patch-3_10_0-957_86_1 (Red Hat package) - update to 1-3.el7
kpatch-patch-3_10_0-957_88_1 (Red Hat package) - update to 1-2.el7
kpatch-patch-4_18_0-348 (Red Hat package) - update to 1-4.el8
kpatch-patch-4_18_0-147_57_1 (Red Hat package) - update to 1-2.el8_1
kpatch-patch-4_18_0-147_48_1 (Red Hat package) - update to 1-7.el8_1
kpatch-patch-4_18_0-147_51_1 (Red Hat package) - update to 1-6.el8_1
kpatch-patch-4_18_0-193_60_2 (Red Hat package) - update to 1-4.el8_2
kpatch-patch-4_18_0-193_56_1 (Red Hat package) - update to 1-5.el8_2
kpatch-patch-4_18_0-193_68_1 (Red Hat package) - update to 1-2.el8_2
kpatch-patch-4_18_0-193_64_1 (Red Hat package) - update to 1-3.el8_2
kpatch-patch-4_18_0-193_65_2 (Red Hat package) - update to 1-2.el8_2
kpatch-patch-4_18_0-193_51_1 (Red Hat package) - update to 1-6.el8_2
kpatch-patch-4_18_0-305_3_1 (Red Hat package) - update to 1-10.el8_4
kpatch-patch-4_18_0-305_19_1 (Red Hat package) - update to 1-6.el8_4
kpatch-patch-4_18_0-305_17_1 (Red Hat package) - update to 1-6.el8_4
kpatch-patch-4_18_0-305_7_1 (Red Hat package) - update to 1-9.el8_4
kpatch-patch-4_18_0-348_2_1 (Red Hat package) - update to 1-3.el8_5
kpatch-patch-4_18_0-348_7_1 (Red Hat package) - update to 1-3.el8_5
kpatch-patch-4_18_0-348_12_2 (Red Hat package) - update to 1-2.el8_5
kpatch-patch-4_18_0-305 (Red Hat package) - update to 1-11.el8
kpatch-patch-4_18_0-147_54_2 (Red Hat package) - update to 1-3.el8_1
kpatch-patch-4_18_0-147_56_1 (Red Hat package) - update to 1-3.el8_1
kpatch-patch-4_18_0-305_25_1 (Red Hat package) - update to 1-5.el8_4
kpatch-patch-4_18_0-305_30_1 (Red Hat package) - update to 1-3.el8_4
kpatch-patch-4_18_0-305_28_1 (Red Hat package) - update to 1-3.el8_4
kpatch-patch-4_18_0-305_12_1 (Red Hat package) - update to 1-7.el8_4
imgbased (Red Hat package) - update to 1.2.24-1.el8ev
kpatch-patch-4_18_0-147_52_1 (Red Hat package) - update to 1-4.el8_1
kpatch-patch-4_18_0-147_44_1 (Red Hat package) - update to 1-10.el8_1
kpatch-patch-4_18_0-193_46_1 (Red Hat package) - update to 1-9.el8_2
kpatch-patch-4_18_0-193_47_1 (Red Hat package) - update to 1-9.el8_2
kpatch-patch-4_18_0-305_10_2 (Red Hat package) - update to 1-8.el8_4
kpatch-patch-4_18_0-147_51_2 (Red Hat package) - update to 1-5.el8_1
kernel (Red Hat package) - addressed in versions 3.10.0-514.101.1.el7, 3.10.0-693.100.1.el7, 3.10.0-957.94.1.el7, 3.10.0-1062.66.1.el7, 3.10.0-1160.62.1.el7, 4.18.0-147.64.1.el8_1, 4.18.0-193.75.1.el8_2, 4.18.0-305.40.1.el8_4, 4.18.0-348.23.1.el8_5
redhat-release-virtualization-host (Red Hat package) - addressed in versions 4.3.22-1.el7ev, 4.5.0-5.el8ev
redhat-virtualization-host (Red Hat package) - update to 4.3.22-20220330.1.el7_9
kernel-rt (Red Hat package) - addressed in versions 3.10.0-1160.62.1.rt56.1203.el7, 4.18.0-193.75.1.rt13.125.el8_2, 4.18.0-305.40.1.rt7.112.el8_4
Traffix SDC - update to 5.2.0
OpenShift Logging - addressed in versions 5.2.10, 5.3.7, 5.4.1
kpatch-patch-3_10_0-1160_59_1 (Red Hat package) - update to 1-1.el7
kpatch-patch-3_10_0-957_92_1 (Red Hat package) - update to 1-1.el7
kpatch-patch-4_18_0-147_58_1 (Red Hat package) - update to 1-1.el8_1
kpatch-patch-4_18_0-147_59_1 (Red Hat package) - update to 1-1.el8_1
kpatch-patch-4_18_0-193_71_1 (Red Hat package) - update to 1-1.el8_2
kpatch-patch-4_18_0-193_70_1 (Red Hat package) - update to 1-1.el8_2
kpatch-patch-4_18_0-305_34_2 (Red Hat package) - update to 1-1.el8_4
kpatch-patch-4_18_0-348_20_1 (Red Hat package) - update to 1-1.el8_5
kpatch-patch-3_10_0-1160_49_1 (Red Hat package) - update to 1-2.el7
kpatch-patch-3_10_0-1160_53_1 (Red Hat package) - update to 1-2.el7
Migration Toolkit for Containers - update to 1.7.1
Red Hat Advanced Cluster Management for Kubernetes - addressed in versions 2.3.10, 2.4.4
kernel-headers - addressed in versions 3.10.0-1160.62.1.0.1, 4.18.0-348.23.1
kernel-doc - addressed in versions 3.10.0-1160.62.1.0.1, 4.18.0-348.23.1
bpftool - addressed in versions 3.10.0-1160.62.1.0.1, 4.18.0-348.23.1
kernel - addressed in versions 3.10.0-1160.62.1.0.1, 4.18.0-348.23.1
kernel-debug - addressed in versions 3.10.0-1160.62.1.0.1, 4.18.0-348.23.1
kernel-debug-devel - addressed in versions 3.10.0-1160.62.1.0.1, 4.18.0-348.23.1
kernel-devel - addressed in versions 3.10.0-1160.62.1.0.1, 4.18.0-348.23.1
kernel-abi-whitelists - update to 3.10.0-1160.62.1.0.1
python-perf - update to 3.10.0-1160.62.1.0.1
kernel-tools-libs-devel - update to 3.10.0-1160.62.1.0.1
kernel-tools - addressed in versions 3.10.0-1160.62.1.0.1, 4.18.0-348.23.1
kernel-tools-libs - addressed in versions 3.10.0-1160.62.1.0.1, 4.18.0-348.23.1
perf - addressed in versions 3.10.0-1160.62.1.0.1, 4.18.0-348.23.1
redhat-virtualization-host-productimg (Red Hat package) - addressed in versions 4.3.22-1.el7, 4.5.0-2.el8
ovirt-node-ng (Red Hat package) - update to 4.4.2-1.el8ev
kernel-debug-modules - update to 4.18.0-348.23.1
kernel-debug-core - update to 4.18.0-348.23.1
kernel-cross-headers - update to 4.18.0-348.23.1
kernel-core - update to 4.18.0-348.23.1
kernel-debug-modules-extra - update to 4.18.0-348.23.1
kernel-modules - update to 4.18.0-348.23.1
kernel-modules-extra - update to 4.18.0-348.23.1
python3-perf - update to 4.18.0-348.23.1
kernel-livepatch-SLE15-SP3_Update_7-debugsource - update to 4-150300.2.2
kernel-livepatch-5_3_18-59_24-default - update to 4-150300.2.2
kernel-livepatch-5_3_18-59_24-default-debuginfo - update to 4-150300.2.2
kernel-livepatch-5_3_18-59_27-default - update to 4-150300.2.2
kernel-livepatch-5_3_18-59_27-default-debuginfo - update to 4-150300.2.2
kernel-livepatch-SLE15-SP3_Update_6-debugsource - update to 4-150300.2.2
kernel-livepatch-SLE15-SP3_Update_5-debugsource - update to 6-150300.2.2
kernel-livepatch-5_3_18-59_19-default - update to 6-150300.2.2
kernel-livepatch-5_3_18-59_19-default-debuginfo - update to 6-150300.2.2
kernel-livepatch-5_3_18-59_16-default - update to 7-150300.2.2
kernel-livepatch-5_3_18-59_16-default-debuginfo - update to 7-150300.2.2
kernel-livepatch-SLE15-SP3_Update_4-debugsource - update to 7-150300.2.2
kernel-livepatch-5_3_18-59_13-default - update to 8-150300.2.2
kernel-livepatch-5_3_18-59_13-default-debuginfo - update to 8-150300.2.2
kernel-livepatch-5_3_18-59_5-default - update to 8-150300.2.2
kernel-livepatch-5_3_18-59_5-default-debuginfo - update to 8-150300.2.2
kernel-livepatch-SLE15-SP3_Update_1-debugsource - update to 8-150300.2.2
kernel-livepatch-SLE15-SP3_Update_3-debugsource - update to 8-150300.2.2
kernel-livepatch-SLE15-SP3_Update_2-debugsource - update to 8-150300.2.2
kernel-livepatch-5_3_18-59_10-default-debuginfo - update to 8-150300.2.2
kernel-livepatch-5_3_18-59_10-default - update to 8-150300.2.2
IBM Spectrum Protect Plus - update to 10.1.11
kernel-livepatch-SLE15-SP3_Update_0-debugsource - update to 10-3.2
kernel-livepatch-5_3_18-57-default-debuginfo - update to 10-3.2
kernel-livepatch-5_3_18-57-default - update to 10-3.2

External References

Related Security Bulletins