Buffer overflow in Linux kernel - CVE-2021-38207

Vulnerability identifier: #VU92752

CSH Severity: Low

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-38207

CWE-ID: CWE-120

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

drivers/net/ethernet/xilinx/ll_temac_main.c in the Linux kernel before 5.12.13 allows remote attackers to cause a denial of service (buffer overflow and lockup) by sending heavy network traffic for about 10 minutes.

Linux kernel
SUSE MicroOS
SUSE Linux Enterprise Module for Realtime
SUSE Linux Enterprise High Availability
SUSE Linux Enterprise Module for Basesystem
SUSE Linux Enterprise Module for Development Tools
SUSE Linux Enterprise Module for Legacy Software
SUSE Linux Enterprise Module for Live Patching
SUSE Linux Enterprise Workstation Extension
SUSE Linux Enterprise Module for Public Cloud
openEuler
Ubuntu
kernel-livepatch-5_3_18-24_83-default
kernel-livepatch-5_3_18-24_83-default-debuginfo
kernel-livepatch-SLE15-SP2_Update_19-debugsource
kernel-livepatch-SLE15-SP3_Update_6-debugsource
kernel-livepatch-5_3_18-59_24-default-debuginfo
kernel-livepatch-5_3_18-59_24-default
bpftool
kernel
kernel-debugsource
perf
python3-perf-debuginfo
kernel-source
kernel-tools-debuginfo
python2-perf
python3-perf
bpftool-debuginfo
kernel-tools-devel
kernel-tools
python2-perf-debuginfo
kernel-debuginfo
kernel-devel
perf-debuginfo
kernel-source-azure
kernel-devel-azure
kernel-syms-azure
kernel-azure-debugsource
kernel-azure-devel
kernel-azure
kernel-azure-debuginfo
kernel-azure-devel-debuginfo
kernel-syms
kernel-macros
kernel-default-extra-debuginfo
kernel-obs-build
kernel-default-debugsource
kernel-default-debuginfo
kernel-default-extra
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-preempt-extra
kernel-default
kernel-default-livepatch-devel
kernel-default-livepatch
kernel-preempt-extra-debuginfo
kernel-preempt
ocfs2-kmp-default-debuginfo
ocfs2-kmp-default
gfs2-kmp-default-debuginfo
gfs2-kmp-default
dlm-kmp-default-debuginfo
dlm-kmp-default
cluster-md-kmp-default-debuginfo
cluster-md-kmp-default
kernel-obs-build-debugsource
kernel-default-devel-debuginfo
kernel-default-devel
kernel-docs
kernel-preempt-devel-debuginfo
kernel-preempt-devel
kernel-preempt-debugsource
kernel-preempt-debuginfo
kernel-default-base
kernel-devel-rt
kernel-source-rt
kernel-syms-rt
kernel-rt_debug-debugsource
ocfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
kernel-rt_debug-devel-debuginfo
kernel-rt_debug-devel
kernel-rt-debuginfo
kernel-rt_debug-debuginfo
kernel-rt_debug
kernel-rt-devel-debuginfo
kernel-rt-devel
gfs2-kmp-rt-debuginfo
gfs2-kmp-rt
dlm-kmp-rt-debuginfo
dlm-kmp-rt
cluster-md-kmp-rt-debuginfo
cluster-md-kmp-rt
kernel-rt-debugsource
kernel-rt
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-zfcpdump
kernel-64kb-devel-debuginfo
kernel-64kb-devel
kernel-64kb-debugsource
kernel-64kb-debuginfo
kernel-64kb
linux-image-5.8.0-1043-azure (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-oem-20.04 (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-5.11.0-34-generic (Ubuntu package)
linux-image-5.11.0-34-generic-64k (Ubuntu package)
linux-image-5.11.0-34-lowlatency (Ubuntu package)
linux-image-5.11.0-34-generic-lpae (Ubuntu package)
linux-image-virtual-hwe-20.04 (Ubuntu package)
linux-image-generic-64k-hwe-20.04 (Ubuntu package)
linux-image-generic-lpae-hwe-20.04 (Ubuntu package)
linux-image-generic-hwe-20.04 (Ubuntu package)
linux-image-lowlatency-hwe-20.04 (Ubuntu package)
linux-image-kvm (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 (Ubuntu package)
linux-image-5.11.0-1017-raspi-nolpae (Ubuntu package)
linux-image-5.11.0-1017-aws (Ubuntu package)
linux-image-5.11.0-1017-oracle (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-5_3_18-24_83-default - update to 1-5.3.4
kernel-livepatch-5_3_18-24_83-default-debuginfo - update to 1-5.3.4
kernel-livepatch-SLE15-SP2_Update_19-debugsource - update to 1-5.3.4
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
bpftool - update to 4.19.90-2108.5.0.0103
kernel - update to 4.19.90-2108.5.0.0103
kernel-debugsource - update to 4.19.90-2108.5.0.0103
perf - update to 4.19.90-2108.5.0.0103
python3-perf-debuginfo - update to 4.19.90-2108.5.0.0103
kernel-source - update to 4.19.90-2108.5.0.0103
kernel-tools-debuginfo - update to 4.19.90-2108.5.0.0103
python2-perf - update to 4.19.90-2108.5.0.0103
python3-perf - update to 4.19.90-2108.5.0.0103
bpftool-debuginfo - update to 4.19.90-2108.5.0.0103
kernel-tools-devel - update to 4.19.90-2108.5.0.0103
kernel-tools - update to 4.19.90-2108.5.0.0103
python2-perf-debuginfo - update to 4.19.90-2108.5.0.0103
kernel-debuginfo - update to 4.19.90-2108.5.0.0103
kernel-devel - update to 4.19.90-2108.5.0.0103
perf-debuginfo - update to 4.19.90-2108.5.0.0103
kernel-source-azure - addressed in versions 5.3.18-18.66.1, 5.3.18-38.22.1
kernel-devel-azure - addressed in versions 5.3.18-18.66.1, 5.3.18-38.22.1
kernel-syms-azure - addressed in versions 5.3.18-18.66.1, 5.3.18-38.22.1
kernel-azure-debugsource - addressed in versions 5.3.18-18.66.2, 5.3.18-38.22.2
kernel-azure-devel - addressed in versions 5.3.18-18.66.2, 5.3.18-38.22.2
kernel-azure - addressed in versions 5.3.18-18.66.2, 5.3.18-38.22.2
kernel-azure-debuginfo - addressed in versions 5.3.18-18.66.2, 5.3.18-38.22.2
kernel-azure-devel-debuginfo - addressed in versions 5.3.18-18.66.2, 5.3.18-38.22.2
kernel-syms - addressed in versions 5.3.18-24.83.1, 5.3.18-59.24.1
kernel-macros - addressed in versions 5.3.18-24.83.1, 5.3.18-59.24.1
kernel-devel - addressed in versions 5.3.18-24.83.1, 5.3.18-59.24.1
kernel-source - addressed in versions 5.3.18-24.83.1, 5.3.18-59.24.1
kernel-default-extra-debuginfo - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-obs-build - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-default-debugsource - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-default-debuginfo - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-default-extra - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
reiserfs-kmp-default-debuginfo - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
reiserfs-kmp-default - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-preempt-extra - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-default - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-default-livepatch-devel - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-default-livepatch - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-preempt-extra-debuginfo - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-preempt - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
ocfs2-kmp-default-debuginfo - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
ocfs2-kmp-default - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
gfs2-kmp-default-debuginfo - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
gfs2-kmp-default - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
dlm-kmp-default-debuginfo - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
dlm-kmp-default - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
cluster-md-kmp-default-debuginfo - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
cluster-md-kmp-default - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-obs-build-debugsource - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-default-devel-debuginfo - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-default-devel - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-docs - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-preempt-devel-debuginfo - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-preempt-devel - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-preempt-debugsource - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-preempt-debuginfo - addressed in versions 5.3.18-24.83.2, 5.3.18-59.24.1
kernel-default-base - addressed in versions 5.3.18-24.83.2.9.38.3, 5.3.18-59.24.1.18.12.1
kernel-devel-rt - update to 5.3.18-51.1
kernel-source-rt - update to 5.3.18-51.1
kernel-syms-rt - update to 5.3.18-51.1
kernel-rt_debug-debugsource - update to 5.3.18-51.2
ocfs2-kmp-rt-debuginfo - update to 5.3.18-51.2
ocfs2-kmp-rt - update to 5.3.18-51.2
kernel-rt_debug-devel-debuginfo - update to 5.3.18-51.2
kernel-rt_debug-devel - update to 5.3.18-51.2
kernel-rt-debuginfo - update to 5.3.18-51.2
kernel-rt_debug-debuginfo - update to 5.3.18-51.2
kernel-rt_debug - update to 5.3.18-51.2
kernel-rt-devel-debuginfo - update to 5.3.18-51.2
kernel-rt-devel - update to 5.3.18-51.2
gfs2-kmp-rt-debuginfo - update to 5.3.18-51.2
gfs2-kmp-rt - update to 5.3.18-51.2
dlm-kmp-rt-debuginfo - update to 5.3.18-51.2
dlm-kmp-rt - update to 5.3.18-51.2
cluster-md-kmp-rt-debuginfo - update to 5.3.18-51.2
cluster-md-kmp-rt - update to 5.3.18-51.2
kernel-rt-debugsource - update to 5.3.18-51.2
kernel-rt - update to 5.3.18-51.2
kernel-zfcpdump-debugsource - update to 5.3.18-59.24.1
kernel-zfcpdump-debuginfo - update to 5.3.18-59.24.1
kernel-zfcpdump - 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
linux-image-5.8.0-1043-azure (Ubuntu package) - update to 5.8.0-1043.46~20.04.1
linux-image-azure (Ubuntu package) - addressed in versions 5.8.0.1043.46~20.04.15, 5.11.0.1015.16
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-64k (Ubuntu package) - update to 5.11.0.34.36
linux-image-lowlatency (Ubuntu package) - update to 5.11.0.34.36
linux-image-generic (Ubuntu package) - update to 5.11.0.34.36
linux-image-5.11.0-34-generic (Ubuntu package) - update to 5.11.0-34.36~20.04.1
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-lowlatency (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-virtual-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-generic-lpae-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-lowlatency-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-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 (Ubuntu package) - update to 5.11.0-1017.18
linux-image-5.11.0-1017-raspi-nolpae (Ubuntu package) - update to 5.11.0-1017.18
linux-image-5.11.0-1017-aws (Ubuntu package) - update to 5.11.0-1017.18~20.04.1
linux-image-5.11.0-1017-oracle (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/c364df2489b8ef2f5e3159b1dff1ff1fdb16040d
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13
• https://security.netapp.com/advisory/ntap-20210902-0007/

• Buffer overflow in Linux kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Ubuntu update for linux
• Ubuntu update for linux-azure-5.8
• openEuler update for kernel