Out-of-bounds read in Linux kernel - CVE-2020-36386

Vulnerability identifier: #VU59125

CSH Severity: Low

CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-36386

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a boundary condition within the hci_extended_inquiry_result_evt() function in Linux kernel. A local user can tun a specially crafted program to trigger an out-of-bounds read error and read contents of memory on the system or crash the kernel.

Linux kernel
Red Hat Enterprise Linux for Real Time for NFV
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Real Time
SUSE Linux Enterprise Server
SUSE Linux Enterprise Workstation Extension
SUSE Linux Enterprise Software Development Kit
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise High Availability
SUSE Linux Enterprise Real Time Extension
SUSE Linux Enterprise Module for Public Cloud
SUSE Linux Enterprise Module for Basesystem
SUSE Linux Enterprise Module for Development Tools
SUSE Linux Enterprise Module for Legacy Software
SUSE Linux Enterprise Module for Live Patching
openEuler
IBM Netezza Host Management
kernel-livepatch-5_3_18-59_10-default
kernel-livepatch-5_3_18-59_10-default-debuginfo
kernel-livepatch-SLE15-SP3_Update_2-debugsource
kgraft-patch-4_12_14-122_83-default
kernel-rt_debug
cluster-md-kmp-rt
cluster-md-kmp-rt-debuginfo
dlm-kmp-rt
dlm-kmp-rt-debuginfo
gfs2-kmp-rt
gfs2-kmp-rt-debuginfo
kernel-rt
kernel-rt-base
kernel-rt-base-debuginfo
kernel-rt-debuginfo
kernel-rt-debugsource
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
ocfs2-kmp-rt-debuginfo
kernel-source-rt
kernel-devel-rt
kernel-azure-debuginfo
kernel-azure
kernel-azure-debugsource
kernel-azure-devel
kernel-syms-azure
kernel-azure-base-debuginfo
kernel-azure-base
kernel-devel-azure
kernel-source-azure
kernel-docs
kernel-default-debuginfo
kernel-default-debugsource
kernel-default-extra
kernel-default-extra-debuginfo
kernel-obs-build
kernel-obs-build-debugsource
ocfs2-kmp-default-debuginfo
ocfs2-kmp-default
gfs2-kmp-default-debuginfo
gfs2-kmp-default
dlm-kmp-default-debuginfo
dlm-kmp-default
cluster-md-kmp-default-debuginfo
cluster-md-kmp-default
kernel-default-kgraft-devel
kernel-default-kgraft
kernel-default-man
kernel-default-devel-debuginfo
kernel-source
kernel-macros
kernel-devel
kernel-syms
kernel-default-devel
kernel-default-base-debuginfo
kernel-default-base
kernel-default
kernel (Red Hat package)
kernel-rt (Red Hat package)
python3-perf-debuginfo
kernel-tools-debuginfo
python3-perf
python2-perf
kernel-debugsource
python2-perf-debuginfo
bpftool
perf-debuginfo
kernel-tools-devel
kernel-tools
bpftool-debuginfo
perf
kernel
kernel-debuginfo
kernel-azure-devel-debuginfo
reiserfs-kmp-default-debuginfo
kernel-preempt-devel
kernel-preempt-devel-debuginfo
reiserfs-kmp-default
kernel-default-livepatch-devel
kernel-default-livepatch
kernel-preempt-extra-debuginfo
kernel-preempt-extra
kernel-preempt-debugsource
kernel-preempt-debuginfo
kernel-zfcpdump
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-64kb-devel-debuginfo
kernel-64kb-devel
kernel-64kb-debugsource
kernel-64kb-debuginfo
kernel-64kb
kernel-preempt

Install updates from vendor's website.

Linux kernel - update to 5.8.1
kernel-livepatch-5_3_18-59_10-default - update to 1-7.5.1
kernel-livepatch-5_3_18-59_10-default-debuginfo - update to 1-7.5.1
kernel-livepatch-SLE15-SP3_Update_2-debugsource - update to 1-7.5.1
kgraft-patch-4_12_14-122_83-default - update to 1-8.3.1
kernel-rt_debug - update to 4.12.14-10.54.1
cluster-md-kmp-rt - update to 4.12.14-10.54.1
cluster-md-kmp-rt-debuginfo - update to 4.12.14-10.54.1
dlm-kmp-rt - update to 4.12.14-10.54.1
dlm-kmp-rt-debuginfo - update to 4.12.14-10.54.1
gfs2-kmp-rt - update to 4.12.14-10.54.1
gfs2-kmp-rt-debuginfo - update to 4.12.14-10.54.1
kernel-rt - update to 4.12.14-10.54.1
kernel-rt-base - update to 4.12.14-10.54.1
kernel-rt-base-debuginfo - update to 4.12.14-10.54.1
kernel-rt-debuginfo - update to 4.12.14-10.54.1
kernel-rt-debugsource - update to 4.12.14-10.54.1
kernel-rt-devel - update to 4.12.14-10.54.1
kernel-rt-devel-debuginfo - update to 4.12.14-10.54.1
kernel-rt_debug-debuginfo - update to 4.12.14-10.54.1
kernel-rt_debug-debugsource - update to 4.12.14-10.54.1
kernel-rt_debug-devel - update to 4.12.14-10.54.1
kernel-rt_debug-devel-debuginfo - update to 4.12.14-10.54.1
kernel-syms-rt - update to 4.12.14-10.54.1
ocfs2-kmp-rt - update to 4.12.14-10.54.1
ocfs2-kmp-rt-debuginfo - update to 4.12.14-10.54.1
kernel-source-rt - update to 4.12.14-10.54.1
kernel-devel-rt - update to 4.12.14-10.54.1
kernel-azure-debuginfo - addressed in versions 4.12.14-16.68.1, 5.3.18-38.8.1
kernel-azure - addressed in versions 4.12.14-16.68.1, 5.3.18-38.8.1
kernel-azure-debugsource - addressed in versions 4.12.14-16.68.1, 5.3.18-38.8.1
kernel-azure-devel - addressed in versions 4.12.14-16.68.1, 5.3.18-38.8.1
kernel-syms-azure - addressed in versions 4.12.14-16.68.1, 5.3.18-38.8.1
kernel-azure-base-debuginfo - update to 4.12.14-16.68.1
kernel-azure-base - update to 4.12.14-16.68.1
kernel-devel-azure - addressed in versions 4.12.14-16.68.1, 5.3.18-38.8.1
kernel-source-azure - addressed in versions 4.12.14-16.68.1, 5.3.18-38.8.1
kernel-docs - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
kernel-default-debugsource - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
kernel-default-extra - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
kernel-default-extra-debuginfo - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
kernel-obs-build - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
kernel-obs-build-debugsource - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
gfs2-kmp-default - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
dlm-kmp-default - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
kernel-default-kgraft-devel - update to 4.12.14-122.83.1
kernel-default-kgraft - update to 4.12.14-122.83.1
kernel-default-man - update to 4.12.14-122.83.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
kernel-source - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
kernel-macros - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
kernel-devel - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
kernel-syms - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
kernel-default-devel - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
kernel-default-base-debuginfo - update to 4.12.14-122.83.1
kernel-default-base - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1.18.4.2
kernel-default - addressed in versions 4.12.14-122.83.1, 5.3.18-59.10.1
kernel (Red Hat package) - update to 4.18.0-348.el8
kernel-rt (Red Hat package) - update to 4.18.0-348.rt7.130.el8
python3-perf-debuginfo - update to 4.19.90-2106.3.0.0095
kernel-tools-debuginfo - update to 4.19.90-2106.3.0.0095
python3-perf - update to 4.19.90-2106.3.0.0095
python2-perf - update to 4.19.90-2106.3.0.0095
kernel-debugsource - update to 4.19.90-2106.3.0.0095
python2-perf-debuginfo - update to 4.19.90-2106.3.0.0095
bpftool - update to 4.19.90-2106.3.0.0095
perf-debuginfo - update to 4.19.90-2106.3.0.0095
kernel-tools-devel - update to 4.19.90-2106.3.0.0095
kernel-tools - update to 4.19.90-2106.3.0.0095
kernel-devel - update to 4.19.90-2106.3.0.0095
bpftool-debuginfo - update to 4.19.90-2106.3.0.0095
kernel-source - update to 4.19.90-2106.3.0.0095
perf - update to 4.19.90-2106.3.0.0095
kernel - update to 4.19.90-2106.3.0.0095
kernel-debuginfo - update to 4.19.90-2106.3.0.0095
kernel-azure-devel-debuginfo - update to 5.3.18-38.8.1
reiserfs-kmp-default-debuginfo - update to 5.3.18-59.10.1
kernel-preempt-devel - update to 5.3.18-59.10.1
kernel-preempt-devel-debuginfo - update to 5.3.18-59.10.1
reiserfs-kmp-default - update to 5.3.18-59.10.1
kernel-default-livepatch-devel - update to 5.3.18-59.10.1
kernel-default-livepatch - update to 5.3.18-59.10.1
kernel-preempt-extra-debuginfo - update to 5.3.18-59.10.1
kernel-preempt-extra - update to 5.3.18-59.10.1
kernel-preempt-debugsource - update to 5.3.18-59.10.1
kernel-preempt-debuginfo - update to 5.3.18-59.10.1
kernel-zfcpdump - update to 5.3.18-59.10.1
kernel-zfcpdump-debugsource - update to 5.3.18-59.10.1
kernel-zfcpdump-debuginfo - update to 5.3.18-59.10.1
kernel-64kb-devel-debuginfo - update to 5.3.18-59.10.1
kernel-64kb-devel - update to 5.3.18-59.10.1
kernel-64kb-debugsource - update to 5.3.18-59.10.1
kernel-64kb-debuginfo - update to 5.3.18-59.10.1
kernel-64kb - update to 5.3.18-59.10.1
kernel-preempt - update to 5.3.18-59.10.1

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.1
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=51c19bf3d5cfaa66571e4b88ba2a6f6295311101
• https://syzkaller.appspot.com/text?tag=ReproC&x=15ca2f46900000
• https://sites.google.com/view/syzscope/kasan-slab-out-of-bounds-read-in-hci_extended_inquiry_result_evt
• https://syzkaller.appspot.com/bug?id=4bf11aa05c4ca51ce0df86e500fce486552dc8d2

• Out-of-bounds read in Linux kernel
• Multiple vulnerabilities in IBM Netezza Host Management
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Red Hat Enterprise Linux 8 update for kernel-rt
• Red Hat Enterprise Linux 8 update for kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• openEuler 20.03 LTS SP1 update for kernel