NULL pointer dereference in Linux kernel - CVE-2021-46283

Vulnerability identifier: #VU90667

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-2021-46283

CWE-ID: CWE-476

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 NULL pointer dereference within the nf_tables_newset() function in net/netfilter/nf_tables_api.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Module for Public Cloud
SUSE Linux Enterprise Module for Realtime
kernel-source-azure
kernel-azure
kernel-azure-debuginfo
kernel-azure-debugsource
kernel-azure-devel
kernel-azure-devel-debuginfo
kernel-syms-azure
kernel-devel-azure
kernel-rt-debugsource
ocfs2-kmp-rt-debuginfo
kernel-rt-devel
kernel-rt-devel-debuginfo
kernel-rt_debug-debuginfo
kernel-rt_debug-debugsource
kernel-rt_debug-devel
kernel-rt_debug-devel-debuginfo
kernel-syms-rt
ocfs2-kmp-rt
kernel-rt-debuginfo
kernel-rt
gfs2-kmp-rt-debuginfo
gfs2-kmp-rt
dlm-kmp-rt-debuginfo
dlm-kmp-rt
cluster-md-kmp-rt-debuginfo
cluster-md-kmp-rt
kernel-source-rt
kernel-devel-rt

Install update from vendor's website.

Linux kernel - update to 5.12.13
kernel-source-azure - update to 5.3.18-150300.38.37.1
kernel-azure - update to 5.3.18-150300.38.37.1
kernel-azure-debuginfo - update to 5.3.18-150300.38.37.1
kernel-azure-debugsource - update to 5.3.18-150300.38.37.1
kernel-azure-devel - update to 5.3.18-150300.38.37.1
kernel-azure-devel-debuginfo - update to 5.3.18-150300.38.37.1
kernel-syms-azure - update to 5.3.18-150300.38.37.1
kernel-devel-azure - update to 5.3.18-150300.38.37.1
kernel-rt-debugsource - update to 5.3.18-150300.71.1
ocfs2-kmp-rt-debuginfo - update to 5.3.18-150300.71.1
kernel-rt-devel - update to 5.3.18-150300.71.1
kernel-rt-devel-debuginfo - update to 5.3.18-150300.71.1
kernel-rt_debug-debuginfo - update to 5.3.18-150300.71.1
kernel-rt_debug-debugsource - update to 5.3.18-150300.71.1
kernel-rt_debug-devel - update to 5.3.18-150300.71.1
kernel-rt_debug-devel-debuginfo - update to 5.3.18-150300.71.1
kernel-syms-rt - update to 5.3.18-150300.71.1
ocfs2-kmp-rt - update to 5.3.18-150300.71.1
kernel-rt-debuginfo - update to 5.3.18-150300.71.1
kernel-rt - update to 5.3.18-150300.71.1
gfs2-kmp-rt-debuginfo - update to 5.3.18-150300.71.1
gfs2-kmp-rt - update to 5.3.18-150300.71.1
dlm-kmp-rt-debuginfo - update to 5.3.18-150300.71.1
dlm-kmp-rt - update to 5.3.18-150300.71.1
cluster-md-kmp-rt-debuginfo - update to 5.3.18-150300.71.1
cluster-md-kmp-rt - update to 5.3.18-150300.71.1
kernel-source-rt - update to 5.3.18-150300.71.1
kernel-devel-rt - update to 5.3.18-150300.71.1

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad9f151e560b016b6ad3280b48e42fa11e1a5440
• https://syzkaller.appspot.com/bug?id=22c3987f75a7b90e238a26b5a5920525c2d1f345
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13

• NULL pointer dereference in Linux kernel netfilter
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel