Buffer overflow in Linux kernel - CVE-2021-47241

Vulnerability identifier: #VU93239

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-2021-47241

CWE-ID: CWE-119

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 vulnerability exists due to memory corruption within the strset_reply_size() function in net/ethtool/strset.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
SUSE Enterprise Storage
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise Server 15 SP3 Business Critical Linux
SUSE Linux Enterprise Server 15 SP3 LTSS
openSUSE Leap
kernel-livepatch-SLE15-SP3_Update_45-debugsource
kernel-livepatch-5_3_18-150300_59_164-default
kernel-livepatch-5_3_18-150300_59_164-default-debuginfo
kernel-livepatch-5_3_18-150300_59_164-preempt-debuginfo
kernel-livepatch-5_3_18-150300_59_164-preempt
dtb-arm
dtb-aarch64
dtb-rockchip
dtb-sprd
dtb-hisilicon
kernel-preempt
kernel-64kb-debugsource
kernel-64kb-livepatch-devel
reiserfs-kmp-64kb
dtb-freescale
kernel-64kb-optional
ocfs2-kmp-64kb-debuginfo
dtb-apm
dtb-exynos
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-zfcpdump
dtb-socionext
kernel-preempt-extra-debuginfo
dlm-kmp-preempt-debuginfo
ocfs2-kmp-preempt-debuginfo
reiserfs-kmp-preempt
kernel-preempt-livepatch-devel
kernel-preempt-devel
kernel-preempt-optional-debuginfo
kernel-preempt-devel-debuginfo
dlm-kmp-preempt
kernel-preempt-extra
cluster-md-kmp-64kb-debuginfo
dtb-cavium
kselftests-kmp-64kb-debuginfo
dtb-renesas
dtb-xilinx
reiserfs-kmp-64kb-debuginfo
cluster-md-kmp-64kb
kernel-64kb-extra
gfs2-kmp-64kb-debuginfo
kernel-64kb-devel
dtb-nvidia
dtb-amlogic
kernel-64kb-extra-debuginfo
dtb-al
dtb-lg
dtb-allwinner
kernel-64kb
cluster-md-kmp-preempt-debuginfo
gfs2-kmp-64kb
dlm-kmp-64kb
kselftests-kmp-64kb
ocfs2-kmp-64kb
kernel-64kb-debuginfo
dtb-zte
dtb-broadcom
dtb-altera
dtb-mediatek
dtb-marvell
dtb-qcom
dlm-kmp-64kb-debuginfo
dtb-amd
kernel-64kb-devel-debuginfo
kernel-64kb-optional-debuginfo
kernel-debug-debuginfo
kernel-default-debuginfo
kernel-obs-build-debugsource
gfs2-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
ocfs2-kmp-default
cluster-md-kmp-default
kernel-default-debugsource
dlm-kmp-default-debuginfo
kernel-obs-build
cluster-md-kmp-default-debuginfo
kernel-kvmsmall-debuginfo
kernel-kvmsmall-livepatch-devel
kernel-kvmsmall-devel-debuginfo
kernel-debug-devel-debuginfo
reiserfs-kmp-preempt-debuginfo
kernel-debug-debugsource
kernel-kvmsmall-debugsource
kernel-debug-livepatch-devel
kernel-debug-devel
kernel-kvmsmall-devel
kernel-debug
kernel-kvmsmall
kernel-docs-html
kernel-devel
kernel-source-vanilla
kernel-source
kernel-macros
kernel-docs
kernel-default-devel-debuginfo
kernel-preempt-optional
kernel-preempt-debuginfo
kselftests-kmp-preempt
gfs2-kmp-preempt
kernel-preempt-debugsource
kselftests-kmp-preempt-debuginfo
ocfs2-kmp-preempt
gfs2-kmp-preempt-debuginfo
cluster-md-kmp-preempt
kernel-default
kernel-obs-qa
kernel-default-extra-debuginfo
reiserfs-kmp-default-debuginfo
kernel-default-devel
kernel-default-livepatch-devel
dlm-kmp-default
kernel-default-livepatch
kernel-default-extra
kernel-default-optional
kernel-syms
kselftests-kmp-default
gfs2-kmp-default
kernel-default-optional-debuginfo
kselftests-kmp-default-debuginfo
reiserfs-kmp-default
kernel-default-base
kernel-default-base-rebuild
kernel-rt
kernel-source-rt
kernel-rt-debuginfo
kernel-rt-debugsource

Install update from vendor's website.

Linux kernel - addressed in versions 5.10.46, 5.12.13, 5.13
kernel-livepatch-SLE15-SP3_Update_45-debugsource - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_164-default - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_164-default-debuginfo - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_164-preempt-debuginfo - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_164-preempt - update to 1-150300.7.3.1
dtb-arm - update to 5.3.18-150300.59.164.1
dtb-aarch64 - update to 5.3.18-150300.59.164.1
dtb-rockchip - update to 5.3.18-150300.59.164.1
dtb-sprd - update to 5.3.18-150300.59.164.1
dtb-hisilicon - update to 5.3.18-150300.59.164.1
kernel-preempt - update to 5.3.18-150300.59.164.1
kernel-64kb-debugsource - update to 5.3.18-150300.59.164.1
kernel-64kb-livepatch-devel - update to 5.3.18-150300.59.164.1
reiserfs-kmp-64kb - update to 5.3.18-150300.59.164.1
dtb-freescale - update to 5.3.18-150300.59.164.1
kernel-64kb-optional - update to 5.3.18-150300.59.164.1
ocfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.164.1
dtb-apm - update to 5.3.18-150300.59.164.1
dtb-exynos - update to 5.3.18-150300.59.164.1
kernel-zfcpdump-debuginfo - update to 5.3.18-150300.59.164.1
kernel-zfcpdump-debugsource - update to 5.3.18-150300.59.164.1
kernel-zfcpdump - update to 5.3.18-150300.59.164.1
dtb-socionext - update to 5.3.18-150300.59.164.1
kernel-preempt-extra-debuginfo - update to 5.3.18-150300.59.164.1
dlm-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
ocfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
reiserfs-kmp-preempt - update to 5.3.18-150300.59.164.1
kernel-preempt-livepatch-devel - update to 5.3.18-150300.59.164.1
kernel-preempt-devel - update to 5.3.18-150300.59.164.1
kernel-preempt-optional-debuginfo - update to 5.3.18-150300.59.164.1
kernel-preempt-devel-debuginfo - update to 5.3.18-150300.59.164.1
dlm-kmp-preempt - update to 5.3.18-150300.59.164.1
kernel-preempt-extra - update to 5.3.18-150300.59.164.1
cluster-md-kmp-64kb-debuginfo - update to 5.3.18-150300.59.164.1
dtb-cavium - update to 5.3.18-150300.59.164.1
kselftests-kmp-64kb-debuginfo - update to 5.3.18-150300.59.164.1
dtb-renesas - update to 5.3.18-150300.59.164.1
dtb-xilinx - update to 5.3.18-150300.59.164.1
reiserfs-kmp-64kb-debuginfo - update to 5.3.18-150300.59.164.1
cluster-md-kmp-64kb - update to 5.3.18-150300.59.164.1
kernel-64kb-extra - update to 5.3.18-150300.59.164.1
gfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.164.1
kernel-64kb-devel - update to 5.3.18-150300.59.164.1
dtb-nvidia - update to 5.3.18-150300.59.164.1
dtb-amlogic - update to 5.3.18-150300.59.164.1
kernel-64kb-extra-debuginfo - update to 5.3.18-150300.59.164.1
dtb-al - update to 5.3.18-150300.59.164.1
dtb-lg - update to 5.3.18-150300.59.164.1
dtb-allwinner - update to 5.3.18-150300.59.164.1
kernel-64kb - update to 5.3.18-150300.59.164.1
cluster-md-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
gfs2-kmp-64kb - update to 5.3.18-150300.59.164.1
dlm-kmp-64kb - update to 5.3.18-150300.59.164.1
kselftests-kmp-64kb - update to 5.3.18-150300.59.164.1
ocfs2-kmp-64kb - update to 5.3.18-150300.59.164.1
kernel-64kb-debuginfo - update to 5.3.18-150300.59.164.1
dtb-zte - update to 5.3.18-150300.59.164.1
dtb-broadcom - update to 5.3.18-150300.59.164.1
dtb-altera - update to 5.3.18-150300.59.164.1
dtb-mediatek - update to 5.3.18-150300.59.164.1
dtb-marvell - update to 5.3.18-150300.59.164.1
dtb-qcom - update to 5.3.18-150300.59.164.1
dlm-kmp-64kb-debuginfo - update to 5.3.18-150300.59.164.1
dtb-amd - update to 5.3.18-150300.59.164.1
kernel-64kb-devel-debuginfo - update to 5.3.18-150300.59.164.1
kernel-64kb-optional-debuginfo - update to 5.3.18-150300.59.164.1
kernel-debug-debuginfo - update to 5.3.18-150300.59.164.1
kernel-default-debuginfo - update to 5.3.18-150300.59.164.1
kernel-obs-build-debugsource - update to 5.3.18-150300.59.164.1
gfs2-kmp-default-debuginfo - update to 5.3.18-150300.59.164.1
ocfs2-kmp-default-debuginfo - update to 5.3.18-150300.59.164.1
ocfs2-kmp-default - update to 5.3.18-150300.59.164.1
cluster-md-kmp-default - update to 5.3.18-150300.59.164.1
kernel-default-debugsource - update to 5.3.18-150300.59.164.1
dlm-kmp-default-debuginfo - update to 5.3.18-150300.59.164.1
kernel-obs-build - update to 5.3.18-150300.59.164.1
cluster-md-kmp-default-debuginfo - update to 5.3.18-150300.59.164.1
kernel-kvmsmall-debuginfo - update to 5.3.18-150300.59.164.1
kernel-kvmsmall-livepatch-devel - update to 5.3.18-150300.59.164.1
kernel-kvmsmall-devel-debuginfo - update to 5.3.18-150300.59.164.1
kernel-debug-devel-debuginfo - update to 5.3.18-150300.59.164.1
reiserfs-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
kernel-debug-debugsource - update to 5.3.18-150300.59.164.1
kernel-kvmsmall-debugsource - update to 5.3.18-150300.59.164.1
kernel-debug-livepatch-devel - update to 5.3.18-150300.59.164.1
kernel-debug-devel - update to 5.3.18-150300.59.164.1
kernel-kvmsmall-devel - update to 5.3.18-150300.59.164.1
kernel-debug - update to 5.3.18-150300.59.164.1
kernel-kvmsmall - update to 5.3.18-150300.59.164.1
kernel-docs-html - update to 5.3.18-150300.59.164.1
kernel-devel - update to 5.3.18-150300.59.164.1
kernel-source-vanilla - update to 5.3.18-150300.59.164.1
kernel-source - update to 5.3.18-150300.59.164.1
kernel-macros - update to 5.3.18-150300.59.164.1
kernel-docs - update to 5.3.18-150300.59.164.1
kernel-default-devel-debuginfo - update to 5.3.18-150300.59.164.1
kernel-preempt-optional - update to 5.3.18-150300.59.164.1
kernel-preempt-debuginfo - update to 5.3.18-150300.59.164.1
kselftests-kmp-preempt - update to 5.3.18-150300.59.164.1
gfs2-kmp-preempt - update to 5.3.18-150300.59.164.1
kernel-preempt-debugsource - update to 5.3.18-150300.59.164.1
kselftests-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
ocfs2-kmp-preempt - update to 5.3.18-150300.59.164.1
gfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
cluster-md-kmp-preempt - update to 5.3.18-150300.59.164.1
kernel-default - update to 5.3.18-150300.59.164.1
kernel-obs-qa - update to 5.3.18-150300.59.164.1
kernel-default-extra-debuginfo - update to 5.3.18-150300.59.164.1
reiserfs-kmp-default-debuginfo - update to 5.3.18-150300.59.164.1
kernel-default-devel - update to 5.3.18-150300.59.164.1
kernel-default-livepatch-devel - update to 5.3.18-150300.59.164.1
dlm-kmp-default - update to 5.3.18-150300.59.164.1
kernel-default-livepatch - update to 5.3.18-150300.59.164.1
kernel-default-extra - update to 5.3.18-150300.59.164.1
kernel-default-optional - update to 5.3.18-150300.59.164.1
kernel-syms - update to 5.3.18-150300.59.164.1
kselftests-kmp-default - update to 5.3.18-150300.59.164.1
gfs2-kmp-default - update to 5.3.18-150300.59.164.1
kernel-default-optional-debuginfo - update to 5.3.18-150300.59.164.1
kselftests-kmp-default-debuginfo - update to 5.3.18-150300.59.164.1
reiserfs-kmp-default - update to 5.3.18-150300.59.164.1
kernel-default-base - update to 5.3.18-150300.59.164.1.150300.18.96.1
kernel-default-base-rebuild - update to 5.3.18-150300.59.164.1.150300.18.96.1
kernel-rt - update to 5.3.18-150300.172.1
kernel-source-rt - update to 5.3.18-150300.172.1
kernel-rt-debuginfo - update to 5.3.18-150300.172.1
kernel-rt-debugsource - update to 5.3.18-150300.172.1

• https://git.kernel.org/stable/c/fb3a948143688e14e2cfd2a2812877923d0e5e92
• https://git.kernel.org/stable/c/cfc7f0e70d649e6d2233fba0d9390b525677d971
• https://git.kernel.org/stable/c/e175aef902697826d344ce3a12189329848fe898
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.46
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13

• Buffer overflow in Linux kernel ethtool
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel