Out-of-bounds read in Linux kernel - CVE-2021-47245

Vulnerability identifier: #VU91088

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-2021-47245

CWE-ID: CWE-125

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 an out-of-bounds read error within the synproxy_parse_options() function in net/netfilter/nf_synproxy_core.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Real Time 12
SUSE Linux Enterprise High Availability Extension 12
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise Workstation Extension 12
Ubuntu
kgraft-patch-4_12_14-122_219-default
linux (Ubuntu package)
linux-lts-xenial (Ubuntu package)
linux-fips (Ubuntu package)
linux-aws (Ubuntu package)
kernel-rt-base-debuginfo
kernel-rt-debuginfo
ocfs2-kmp-rt
dlm-kmp-rt
kernel-rt_debug-debuginfo
kernel-rt_debug-devel
kernel-devel-rt
kernel-source-rt
kernel-rt
kernel-rt_debug
kernel-rt-base
kernel-rt-devel-debuginfo
gfs2-kmp-rt
ocfs2-kmp-rt-debuginfo
kernel-syms-rt
kernel-rt_debug-devel-debuginfo
cluster-md-kmp-rt
dlm-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt_debug-debugsource
kernel-rt-debugsource
kernel-rt-devel
gfs2-kmp-rt-debuginfo
kernel-azure-base
kernel-azure
kernel-syms-azure
kernel-azure-debuginfo
kernel-azure-devel
kernel-azure-base-debuginfo
kernel-azure-debugsource
kernel-devel-azure
kernel-source-azure
kernel-syms
kernel-obs-build
kernel-obs-build-debugsource
kernel-default-man
kernel-default-extra-debuginfo
kernel-default-extra
gfs2-kmp-default-debuginfo
ocfs2-kmp-default
kernel-default-base
kernel-default-base-debuginfo
kernel-default
cluster-md-kmp-default
kernel-default-debugsource
dlm-kmp-default
kernel-default-devel
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
kernel-default-debuginfo
gfs2-kmp-default
kernel-docs
kernel-macros
kernel-source
kernel-devel
kernel-default-devel-debuginfo
kernel-default-kgraft
kernel-default-kgraft-devel
dlm-kmp-default-debuginfo
Dell Secure Connect Gateway

Install update from vendor's website.

Linux kernel - addressed in versions 4.4.274, 4.9.274, 4.14.238, 4.19.196, 5.4.128, 5.10.46, 5.12.13, 5.13
kgraft-patch-4_12_14-122_219-default - update to 1-8.3.1
linux (Ubuntu package) - addressed in versions 4.4.0.268.274, 4.4.0-268.302, 4.4.0.1144.141, 4.4.0-1144.155, 4.4.0.1181.185, 4.4.0-1181.196
linux-lts-xenial (Ubuntu package) - addressed in versions 4.4.0.268.302~14.04.1, 4.4.0-268.302~14.04.1
linux-fips (Ubuntu package) - addressed in versions 4.4.0.1113.114, 4.4.0-1113.120
linux-aws (Ubuntu package) - addressed in versions 4.4.0.1143.140, 4.4.0-1143.149
kernel-rt-base-debuginfo - update to 4.12.14-10.188.1
kernel-rt-debuginfo - update to 4.12.14-10.188.1
ocfs2-kmp-rt - update to 4.12.14-10.188.1
dlm-kmp-rt - update to 4.12.14-10.188.1
kernel-rt_debug-debuginfo - update to 4.12.14-10.188.1
kernel-rt_debug-devel - update to 4.12.14-10.188.1
kernel-devel-rt - update to 4.12.14-10.188.1
kernel-source-rt - update to 4.12.14-10.188.1
kernel-rt - update to 4.12.14-10.188.1
kernel-rt_debug - update to 4.12.14-10.188.1
kernel-rt-base - update to 4.12.14-10.188.1
kernel-rt-devel-debuginfo - update to 4.12.14-10.188.1
gfs2-kmp-rt - update to 4.12.14-10.188.1
ocfs2-kmp-rt-debuginfo - update to 4.12.14-10.188.1
kernel-syms-rt - update to 4.12.14-10.188.1
kernel-rt_debug-devel-debuginfo - update to 4.12.14-10.188.1
cluster-md-kmp-rt - update to 4.12.14-10.188.1
dlm-kmp-rt-debuginfo - update to 4.12.14-10.188.1
cluster-md-kmp-rt-debuginfo - update to 4.12.14-10.188.1
kernel-rt_debug-debugsource - update to 4.12.14-10.188.1
kernel-rt-debugsource - update to 4.12.14-10.188.1
kernel-rt-devel - update to 4.12.14-10.188.1
gfs2-kmp-rt-debuginfo - update to 4.12.14-10.188.1
kernel-azure-base - update to 4.12.14-16.188.1
kernel-azure - update to 4.12.14-16.188.1
kernel-syms-azure - update to 4.12.14-16.188.1
kernel-azure-debuginfo - update to 4.12.14-16.188.1
kernel-azure-devel - update to 4.12.14-16.188.1
kernel-azure-base-debuginfo - update to 4.12.14-16.188.1
kernel-azure-debugsource - update to 4.12.14-16.188.1
kernel-devel-azure - update to 4.12.14-16.188.1
kernel-source-azure - update to 4.12.14-16.188.1
kernel-syms - update to 4.12.14-122.219.1
kernel-obs-build - update to 4.12.14-122.219.1
kernel-obs-build-debugsource - update to 4.12.14-122.219.1
kernel-default-man - update to 4.12.14-122.219.1
kernel-default-extra-debuginfo - update to 4.12.14-122.219.1
kernel-default-extra - update to 4.12.14-122.219.1
gfs2-kmp-default-debuginfo - update to 4.12.14-122.219.1
ocfs2-kmp-default - update to 4.12.14-122.219.1
kernel-default-base - update to 4.12.14-122.219.1
kernel-default-base-debuginfo - update to 4.12.14-122.219.1
kernel-default - update to 4.12.14-122.219.1
cluster-md-kmp-default - update to 4.12.14-122.219.1
kernel-default-debugsource - update to 4.12.14-122.219.1
dlm-kmp-default - update to 4.12.14-122.219.1
kernel-default-devel - update to 4.12.14-122.219.1
cluster-md-kmp-default-debuginfo - update to 4.12.14-122.219.1
ocfs2-kmp-default-debuginfo - update to 4.12.14-122.219.1
kernel-default-debuginfo - update to 4.12.14-122.219.1
gfs2-kmp-default - update to 4.12.14-122.219.1
kernel-docs - update to 4.12.14-122.219.1
kernel-macros - update to 4.12.14-122.219.1
kernel-source - update to 4.12.14-122.219.1
kernel-devel - update to 4.12.14-122.219.1
kernel-default-devel-debuginfo - update to 4.12.14-122.219.1
kernel-default-kgraft - update to 4.12.14-122.219.1
kernel-default-kgraft-devel - update to 4.12.14-122.219.1
dlm-kmp-default-debuginfo - update to 4.12.14-122.219.1
Dell Secure Connect Gateway - update to 5.26.00.18

• https://git.kernel.org/stable/c/e1eb98cfeafdd85537e7e3cefe93ca9bfbcc3ea8
• https://git.kernel.org/stable/c/576c1526b4d83c44ad7b673cb841f36cbc6cb6c4
• https://git.kernel.org/stable/c/674b5f0c6a4fc5d3abce877048290cea6091fcb1
• https://git.kernel.org/stable/c/7d9a9a1a88a3da574e019b4de756bc73337b3b0b
• https://git.kernel.org/stable/c/6defc77d48eff74075b80ad5925061b2fc010d98
• https://git.kernel.org/stable/c/9cdf299ba4e153b5e56187648420de22c6216f02
• https://git.kernel.org/stable/c/f648089337cb8ed40b2bb96e244f72b9d97dc96b
• https://git.kernel.org/stable/c/5fc177ab759418c9537433e63301096e733fb915
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.238
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.196
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.274
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.274
• 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
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.128

• Out-of-bounds read in Linux kernel netfilter
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Multiple vulnerabilities in Dell Secure Connect Gateway
• Ubuntu update for linux-aws
• Ubuntu update for linux
• Ubuntu update for linux-fips
• Ubuntu update for linux-lts-xenial