Null pointer dereference in Linux kernel - CVE-2021-38206

Vulnerability identifier: #VU92758

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-2021-38206

CWE-ID: CWE-476

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The mac80211 subsystem in the Linux kernel before 5.12.13, when a device supporting only 5 GHz is used, allows attackers to cause a denial of service (NULL pointer dereference in the radiotap parser) by injecting a frame with 802.11a rates.

Linux kernel
SUSE MicroOS
SUSE Linux Enterprise Module for Public Cloud
SUSE Linux Enterprise Workstation Extension
SUSE Linux Enterprise Module for Live Patching
SUSE Linux Enterprise Module for Legacy Software
SUSE Linux Enterprise Module for Development Tools
SUSE Linux Enterprise Module for Basesystem
SUSE Linux Enterprise High Availability
Ubuntu
kernel-livepatch-SLE15-SP3_Update_6-debugsource
kernel-livepatch-5_3_18-59_24-default-debuginfo
kernel-livepatch-5_3_18-59_24-default
kernel-syms-azure
kernel-devel-azure
kernel-source-azure
kernel-azure-debuginfo
kernel-azure-debugsource
kernel-azure-devel
kernel-azure-devel-debuginfo
kernel-azure
kernel-zfcpdump-debugsource
kernel-preempt
kernel-zfcpdump
kernel-macros
kernel-devel
kernel-64kb-devel-debuginfo
kernel-64kb-devel
kernel-64kb-debugsource
kernel-64kb-debuginfo
kernel-64kb
kernel-zfcpdump-debuginfo
cluster-md-kmp-default
cluster-md-kmp-default-debuginfo
dlm-kmp-default
dlm-kmp-default-debuginfo
gfs2-kmp-default
gfs2-kmp-default-debuginfo
ocfs2-kmp-default
ocfs2-kmp-default-debuginfo
kernel-default
kernel-default-debuginfo
kernel-default-debugsource
kernel-default-devel
kernel-default-devel-debuginfo
kernel-default-extra
kernel-default-extra-debuginfo
kernel-preempt-debuginfo
kernel-preempt-debugsource
kernel-preempt-extra
kernel-preempt-extra-debuginfo
kernel-default-livepatch
kernel-default-livepatch-devel
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-source
kernel-docs
kernel-preempt-devel-debuginfo
kernel-preempt-devel
kernel-syms
kernel-obs-build-debugsource
kernel-obs-build
kernel-default-base
linux-image-oem-20.04 (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-5.11.0-34-generic-64k (Ubuntu package)
linux-image-5.11.0-34-generic-lpae (Ubuntu package)
linux-image-5.11.0-34-lowlatency (Ubuntu package)
linux-image-5.11.0-34-generic (Ubuntu package)
linux-image-lowlatency-hwe-20.04 (Ubuntu package)
linux-image-generic-hwe-20.04 (Ubuntu package)
linux-image-generic-lpae-hwe-20.04 (Ubuntu package)
linux-image-generic-64k-hwe-20.04 (Ubuntu package)
linux-image-virtual-hwe-20.04 (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-5.11.0-1015-kvm (Ubuntu package)
linux-image-5.11.0-1015-azure (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-raspi-nolpae (Ubuntu package)
linux-image-5.11.0-1017-raspi-nolpae (Ubuntu package)
linux-image-5.11.0-1017-raspi (Ubuntu package)
linux-image-5.11.0-1017-oracle (Ubuntu package)
linux-image-5.11.0-1017-aws (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-gke (Ubuntu package)
linux-image-5.11.0-1018-gcp (Ubuntu package)

Install update from vendor's repository.

kernel-livepatch-SLE15-SP3_Update_6-debugsource - update to 1-7.5.1
kernel-livepatch-5_3_18-59_24-default-debuginfo - update to 1-7.5.1
kernel-livepatch-5_3_18-59_24-default - update to 1-7.5.1
kernel-syms-azure - update to 5.3.18-38.22.1
kernel-devel-azure - update to 5.3.18-38.22.1
kernel-source-azure - update to 5.3.18-38.22.1
kernel-azure-debuginfo - update to 5.3.18-38.22.2
kernel-azure-debugsource - update to 5.3.18-38.22.2
kernel-azure-devel - update to 5.3.18-38.22.2
kernel-azure-devel-debuginfo - update to 5.3.18-38.22.2
kernel-azure - update to 5.3.18-38.22.2
kernel-zfcpdump-debugsource - update to 5.3.18-59.24.1
kernel-preempt - update to 5.3.18-59.24.1
kernel-zfcpdump - update to 5.3.18-59.24.1
kernel-macros - update to 5.3.18-59.24.1
kernel-devel - update to 5.3.18-59.24.1
kernel-64kb-devel-debuginfo - update to 5.3.18-59.24.1
kernel-64kb-devel - update to 5.3.18-59.24.1
kernel-64kb-debugsource - update to 5.3.18-59.24.1
kernel-64kb-debuginfo - update to 5.3.18-59.24.1
kernel-64kb - update to 5.3.18-59.24.1
kernel-zfcpdump-debuginfo - update to 5.3.18-59.24.1
cluster-md-kmp-default - update to 5.3.18-59.24.1
cluster-md-kmp-default-debuginfo - update to 5.3.18-59.24.1
dlm-kmp-default - update to 5.3.18-59.24.1
dlm-kmp-default-debuginfo - update to 5.3.18-59.24.1
gfs2-kmp-default - update to 5.3.18-59.24.1
gfs2-kmp-default-debuginfo - update to 5.3.18-59.24.1
ocfs2-kmp-default - update to 5.3.18-59.24.1
ocfs2-kmp-default-debuginfo - update to 5.3.18-59.24.1
kernel-default - update to 5.3.18-59.24.1
kernel-default-debuginfo - update to 5.3.18-59.24.1
kernel-default-debugsource - update to 5.3.18-59.24.1
kernel-default-devel - update to 5.3.18-59.24.1
kernel-default-devel-debuginfo - update to 5.3.18-59.24.1
kernel-default-extra - update to 5.3.18-59.24.1
kernel-default-extra-debuginfo - update to 5.3.18-59.24.1
kernel-preempt-debuginfo - update to 5.3.18-59.24.1
kernel-preempt-debugsource - update to 5.3.18-59.24.1
kernel-preempt-extra - update to 5.3.18-59.24.1
kernel-preempt-extra-debuginfo - update to 5.3.18-59.24.1
kernel-default-livepatch - update to 5.3.18-59.24.1
kernel-default-livepatch-devel - update to 5.3.18-59.24.1
reiserfs-kmp-default-debuginfo - update to 5.3.18-59.24.1
reiserfs-kmp-default - update to 5.3.18-59.24.1
kernel-source - update to 5.3.18-59.24.1
kernel-docs - update to 5.3.18-59.24.1
kernel-preempt-devel-debuginfo - update to 5.3.18-59.24.1
kernel-preempt-devel - update to 5.3.18-59.24.1
kernel-syms - update to 5.3.18-59.24.1
kernel-obs-build-debugsource - update to 5.3.18-59.24.1
kernel-obs-build - update to 5.3.18-59.24.1
kernel-default-base - update to 5.3.18-59.24.1.18.12.1
linux-image-oem-20.04 (Ubuntu package) - update to 5.11.0.34.36
linux-image-virtual (Ubuntu package) - update to 5.11.0.34.36
linux-image-generic-lpae (Ubuntu package) - update to 5.11.0.34.36
linux-image-generic (Ubuntu package) - update to 5.11.0.34.36
linux-image-generic-64k (Ubuntu package) - update to 5.11.0.34.36
linux-image-lowlatency (Ubuntu package) - update to 5.11.0.34.36
linux-image-5.11.0-34-generic-64k (Ubuntu package) - update to 5.11.0-34.36~20.04.1
linux-image-5.11.0-34-generic-lpae (Ubuntu package) - update to 5.11.0-34.36~20.04.1
linux-image-5.11.0-34-lowlatency (Ubuntu package) - update to 5.11.0-34.36~20.04.1
linux-image-5.11.0-34-generic (Ubuntu package) - update to 5.11.0-34.36~20.04.1
linux-image-lowlatency-hwe-20.04 (Ubuntu package) - update to 5.11.0.34.36~20.04.13
linux-image-generic-hwe-20.04 (Ubuntu package) - update to 5.11.0.34.36~20.04.13
linux-image-generic-lpae-hwe-20.04 (Ubuntu package) - update to 5.11.0.34.36~20.04.13
linux-image-generic-64k-hwe-20.04 (Ubuntu package) - update to 5.11.0.34.36~20.04.13
linux-image-virtual-hwe-20.04 (Ubuntu package) - update to 5.11.0.34.36~20.04.13
linux-image-kvm (Ubuntu package) - update to 5.11.0.1015.16
linux-image-azure (Ubuntu package) - update to 5.11.0.1015.16
linux-image-5.11.0-1015-kvm (Ubuntu package) - update to 5.11.0-1015.16
linux-image-5.11.0-1015-azure (Ubuntu package) - update to 5.11.0-1015.16~20.04.1
linux-image-raspi (Ubuntu package) - update to 5.11.0.1017.15
linux-image-raspi-nolpae (Ubuntu package) - update to 5.11.0.1017.15
linux-image-5.11.0-1017-raspi-nolpae (Ubuntu package) - update to 5.11.0-1017.18
linux-image-5.11.0-1017-raspi (Ubuntu package) - update to 5.11.0-1017.18
linux-image-5.11.0-1017-oracle (Ubuntu package) - update to 5.11.0-1017.18~20.04.1
linux-image-5.11.0-1017-aws (Ubuntu package) - update to 5.11.0-1017.18~20.04.1
linux-image-oracle (Ubuntu package) - update to 5.11.0.1017.18~20.04.10
linux-image-aws (Ubuntu package) - update to 5.11.0.1017.18~20.04.16
linux-image-gcp (Ubuntu package) - update to 5.11.0.1018.18
linux-image-gke (Ubuntu package) - update to 5.11.0.1018.18
linux-image-5.11.0-1018-gcp (Ubuntu package) - update to 5.11.0-1018.20

• https://github.com/torvalds/linux/commit/bddc0c411a45d3718ac535a070f349be8eca8d48
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13

• Null pointer dereference in Linux kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Ubuntu update for linux