Input validation error in Linux kernel - CVE-2021-47669

Vulnerability identifier: #VU107799

CSH Severity: Low

CVSS v4 BT: 4.3 [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/E:U/U:Clear]

CVE-ID: CVE-2021-47669

CWE-ID: CWE-20

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 input validation within the vxcan_xmit() function in drivers/net/can/vxcan.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Enterprise Live Patching
kgraft-patch-4_12_14-122_258-default
kernel-default-base
kernel-default-man
kernel-default-kgraft
kernel-default-kgraft-devel
kernel-source
kernel-macros
kernel-devel
kernel-default
kernel-default-devel
gfs2-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
kernel-default-debuginfo
ocfs2-kmp-default
kernel-default-devel-debuginfo
kernel-default-debugsource
dlm-kmp-default-debuginfo
kernel-syms
cluster-md-kmp-default-debuginfo
kernel-default-base-debuginfo
cluster-md-kmp-default
gfs2-kmp-default
dlm-kmp-default
kernel-rt
kernel-source-rt
kernel-rt-debuginfo
kernel-rt-debugsource

Install update from vendor's website.

Linux kernel - update to 5.10.11
kgraft-patch-4_12_14-122_258-default - update to 1-8.3.1
kernel-default-base - update to 4.12.14-122.258.1
kernel-default-man - update to 4.12.14-122.258.1
kernel-default-kgraft - update to 4.12.14-122.258.1
kernel-default-kgraft-devel - update to 4.12.14-122.258.1
kernel-source - update to 4.12.14-122.258.1
kernel-macros - update to 4.12.14-122.258.1
kernel-devel - update to 4.12.14-122.258.1
kernel-default - update to 4.12.14-122.258.1
kernel-default-devel - update to 4.12.14-122.258.1
gfs2-kmp-default-debuginfo - update to 4.12.14-122.258.1
ocfs2-kmp-default-debuginfo - update to 4.12.14-122.258.1
kernel-default-debuginfo - update to 4.12.14-122.258.1
ocfs2-kmp-default - update to 4.12.14-122.258.1
kernel-default-devel-debuginfo - update to 4.12.14-122.258.1
kernel-default-debugsource - update to 4.12.14-122.258.1
dlm-kmp-default-debuginfo - update to 4.12.14-122.258.1
kernel-syms - update to 4.12.14-122.258.1
cluster-md-kmp-default-debuginfo - update to 4.12.14-122.258.1
kernel-default-base-debuginfo - update to 4.12.14-122.258.1
cluster-md-kmp-default - update to 4.12.14-122.258.1
gfs2-kmp-default - update to 4.12.14-122.258.1
dlm-kmp-default - update to 4.12.14-122.258.1
kernel-rt - update to 5.3.18-150300.208.1
kernel-source-rt - update to 5.3.18-150300.208.1
kernel-rt-debuginfo - update to 5.3.18-150300.208.1
kernel-rt-debugsource - update to 5.3.18-150300.208.1

• https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105
• https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb
• https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052
• https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70
• https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.11

• Input validation error in Linux kernel net can driver
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel