Improper error handling in Linux kernel - CVE-2021-47145

Vulnerability identifier: #VU93654

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-2021-47145

CWE-ID: CWE-388

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 improper error handling within the link_to_fixup_dir() function in fs/btrfs/tree-log.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Real Time 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Availability Extension 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise Workstation Extension 12
Ubuntu
openEuler
kgraft-patch-4_12_14-122_222-default
linux (Ubuntu package)
linux-fips (Ubuntu package)
kernel-rt_debug-devel-debuginfo
kernel-source-rt
ocfs2-kmp-rt
ocfs2-kmp-rt-debuginfo
kernel-rt-base
kernel-rt-base-debuginfo
gfs2-kmp-rt-debuginfo
kernel-rt-devel-debuginfo
kernel-rt-debugsource
cluster-md-kmp-rt-debuginfo
kernel-syms-rt
kernel-rt-devel
dlm-kmp-rt-debuginfo
dlm-kmp-rt
kernel-rt_debug-debuginfo
kernel-rt_debug-devel
cluster-md-kmp-rt
kernel-rt-debuginfo
kernel-devel-rt
kernel-rt_debug
kernel-rt
gfs2-kmp-rt
kernel-rt_debug-debugsource
kernel-azure
kernel-azure-debugsource
kernel-azure-devel
kernel-azure-base
kernel-azure-base-debuginfo
kernel-syms-azure
kernel-azure-debuginfo
kernel-devel-azure
kernel-source-azure
kernel-default-devel
kernel-default
gfs2-kmp-default
dlm-kmp-default-debuginfo
ocfs2-kmp-default
kernel-default-base
kernel-devel
kernel-source
kernel-macros
kernel-default-devel-debuginfo
kernel-default-kgraft-devel
kernel-default-kgraft
kernel-docs
kernel-obs-build-debugsource
kernel-obs-build
kernel-default-man
kernel-default-extra
kernel-default-extra-debuginfo
ocfs2-kmp-default-debuginfo
kernel-default-debuginfo
cluster-md-kmp-default
kernel-default-base-debuginfo
cluster-md-kmp-default-debuginfo
dlm-kmp-default
kernel-default-debugsource
gfs2-kmp-default-debuginfo
kernel-syms
kernel-debugsource
python2-perf
perf
kernel-tools-devel
perf-debuginfo
python3-perf-debuginfo
kernel-tools
bpftool-debuginfo
kernel-tools-debuginfo
bpftool
kernel-debuginfo
python3-perf
kernel
python2-perf-debuginfo

Install update from vendor's website.

Linux kernel - addressed in versions 4.4.271, 4.9.271, 4.14.235, 4.19.193, 5.4.124, 5.10.42, 5.12.9, 5.13
kgraft-patch-4_12_14-122_222-default - update to 1-8.3.1
linux (Ubuntu package) - addressed in versions 4.4.0.279.285, 4.4.0-279.313, 4.4.0.279.313~14.04.1, 4.4.0-279.313~14.04.1+1, 4.4.0.1153.150, 4.4.0-1153.159, 4.4.0.1154.151, 4.4.0-1154.165, 4.4.0.1191.195, 4.4.0-1191.206
linux-fips (Ubuntu package) - addressed in versions 4.4.0.1123.124, 4.4.0-1123.130
kernel-rt_debug-devel-debuginfo - update to 4.12.14-10.194.1
kernel-source-rt - update to 4.12.14-10.194.1
ocfs2-kmp-rt - update to 4.12.14-10.194.1
ocfs2-kmp-rt-debuginfo - update to 4.12.14-10.194.1
kernel-rt-base - update to 4.12.14-10.194.1
kernel-rt-base-debuginfo - update to 4.12.14-10.194.1
gfs2-kmp-rt-debuginfo - update to 4.12.14-10.194.1
kernel-rt-devel-debuginfo - update to 4.12.14-10.194.1
kernel-rt-debugsource - update to 4.12.14-10.194.1
cluster-md-kmp-rt-debuginfo - update to 4.12.14-10.194.1
kernel-syms-rt - update to 4.12.14-10.194.1
kernel-rt-devel - update to 4.12.14-10.194.1
dlm-kmp-rt-debuginfo - update to 4.12.14-10.194.1
dlm-kmp-rt - update to 4.12.14-10.194.1
kernel-rt_debug-debuginfo - update to 4.12.14-10.194.1
kernel-rt_debug-devel - update to 4.12.14-10.194.1
cluster-md-kmp-rt - update to 4.12.14-10.194.1
kernel-rt-debuginfo - update to 4.12.14-10.194.1
kernel-devel-rt - update to 4.12.14-10.194.1
kernel-rt_debug - update to 4.12.14-10.194.1
kernel-rt - update to 4.12.14-10.194.1
gfs2-kmp-rt - update to 4.12.14-10.194.1
kernel-rt_debug-debugsource - update to 4.12.14-10.194.1
kernel-azure - update to 4.12.14-16.194.1
kernel-azure-debugsource - update to 4.12.14-16.194.1
kernel-azure-devel - update to 4.12.14-16.194.1
kernel-azure-base - update to 4.12.14-16.194.1
kernel-azure-base-debuginfo - update to 4.12.14-16.194.1
kernel-syms-azure - update to 4.12.14-16.194.1
kernel-azure-debuginfo - update to 4.12.14-16.194.1
kernel-devel-azure - update to 4.12.14-16.194.1
kernel-source-azure - update to 4.12.14-16.194.1
kernel-default-devel - update to 4.12.14-122.222.1
kernel-default - update to 4.12.14-122.222.1
gfs2-kmp-default - update to 4.12.14-122.222.1
dlm-kmp-default-debuginfo - update to 4.12.14-122.222.1
ocfs2-kmp-default - update to 4.12.14-122.222.1
kernel-default-base - update to 4.12.14-122.222.1
kernel-devel - update to 4.12.14-122.222.1
kernel-source - update to 4.12.14-122.222.1
kernel-macros - update to 4.12.14-122.222.1
kernel-default-devel-debuginfo - update to 4.12.14-122.222.1
kernel-default-kgraft-devel - update to 4.12.14-122.222.1
kernel-default-kgraft - update to 4.12.14-122.222.1
kernel-docs - update to 4.12.14-122.222.1
kernel-obs-build-debugsource - update to 4.12.14-122.222.1
kernel-obs-build - update to 4.12.14-122.222.1
kernel-default-man - update to 4.12.14-122.222.1
kernel-default-extra - update to 4.12.14-122.222.1
kernel-default-extra-debuginfo - update to 4.12.14-122.222.1
ocfs2-kmp-default-debuginfo - update to 4.12.14-122.222.1
kernel-default-debuginfo - update to 4.12.14-122.222.1
cluster-md-kmp-default - update to 4.12.14-122.222.1
kernel-default-base-debuginfo - update to 4.12.14-122.222.1
cluster-md-kmp-default-debuginfo - update to 4.12.14-122.222.1
dlm-kmp-default - update to 4.12.14-122.222.1
kernel-default-debugsource - update to 4.12.14-122.222.1
gfs2-kmp-default-debuginfo - update to 4.12.14-122.222.1
kernel-syms - update to 4.12.14-122.222.1
kernel-debugsource - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-devel - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
python2-perf - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
perf - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-tools-devel - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
perf-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
python3-perf-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-tools - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
bpftool-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-tools-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
bpftool - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-source - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
python3-perf - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
python2-perf-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273

• https://git.kernel.org/stable/c/76bfd8ac20bebeae599452a03dfc5724c0475dcf
• https://git.kernel.org/stable/c/e934c4ee17b33bafb0444f2f9766cda7166d3c40
• https://git.kernel.org/stable/c/0eaf383c6a4a83c09f60fd07a1bea9f1a9181611
• https://git.kernel.org/stable/c/6eccfb28f8dca70c9b1b3bb3194ca54cbe73a9fa
• https://git.kernel.org/stable/c/0ed102453aa1cd12fefde8f6b60b9519b0b1f003
• https://git.kernel.org/stable/c/7e13db503918820e6333811cdc6f151dcea5090a
• https://git.kernel.org/stable/c/b545442133580dcb2f2496133bf850824d41255c
• https://git.kernel.org/stable/c/91df99a6eb50d5a1bc70fff4a09a0b7ae6aab96d
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.235
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.193
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.271
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.271
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.42
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.9
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.124

• Improper error handling in Linux kernel btrfs
• openEuler 20.03 LTS SP1 update for kernel
• openEuler 20.03 LTS SP4 update for 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-fips