NULL pointer dereference in Linux kernel - CVE-2020-11668

Vulnerability identifier: #VU27875

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-2020-11668

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 a NULL pointer dereference error within the drivers/media/usb/gspca/xirlink_cit.c in Xirlink camera USB driver. A local user can pass specially crafted data to the driver and perform a denial of service (DoS) attack.

Linux kernel
CentOS
Anolis OS
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
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 x86_64
Slackware Linux
Ubuntu
kernel (Red Hat package)
kernel-rt (Red Hat package)
linux-kvm (Ubuntu package)
linux-snapdragon (Ubuntu package)
linux-hwe (Ubuntu package)
linux-gcp (Ubuntu package)
linux-azure (Ubuntu package)
linux (Ubuntu package)
linux-raspi2 (Ubuntu package)
linux-oem (Ubuntu package)
linux-oracle (Ubuntu package)
linux-aws (Ubuntu package)
linux-gke-4.15 (Ubuntu package)
linux-aws-hwe (Ubuntu package)
kernel-debug-core
kernel-modules-extra
kernel-debug-devel
kernel-debug-modules
kernel-debug-modules-extra
kernel-devel
kernel-headers
kernel-modules
kernel-modules-internal
kernel-tools
kernel-tools-libs
kernel-tools-libs-devel
perf
python3-perf
kernel-debug
bpftool
kernel
python-perf
kernel-core
linux-4.4.227/kernel-huge
linux-4.4.227/kernel-modules
linux-4.4.227/kernel-generic
linux-4.4.227/kernel-headers

Install updates from vendor's website.

Linux kernel - update to 5.6.1
kernel (Red Hat package) - addressed in versions 3.10.0-1160.36.2.el7, 4.18.0-240.el8
kernel-rt (Red Hat package) - update to 3.10.0-1160.36.2.rt56.1179.el7
linux-kvm (Ubuntu package) - update to 4.15.0-1059.60
linux-snapdragon (Ubuntu package) - update to 4.15.0-1077.84
linux-hwe (Ubuntu package) - update to 4.15.0-99.100~16.04.1
linux-gcp (Ubuntu package) - update to 4.15.0-1061.65
linux-azure (Ubuntu package) - update to 4.15.0-1082.92~16.04.1
linux (Ubuntu package) - update to 4.15.0-99.100
linux-raspi2 (Ubuntu package) - update to 4.15.0-1061.65
linux-oem (Ubuntu package) - update to 4.15.0-1080.90
linux-oracle (Ubuntu package) - addressed in versions 4.15.0-1038.42~16.04.1, 4.15.0-1038.42
linux-aws (Ubuntu package) - update to 4.15.0-1066.70
linux-gke-4.15 (Ubuntu package) - update to 4.15.0-1058.61
linux-aws-hwe (Ubuntu package) - update to 4.15.0-1066.70~16.04.1
kernel-debug-core - update to 4.19.91-26
kernel-modules-extra - update to 4.19.91-26
kernel-debug-devel - update to 4.19.91-26
kernel-debug-modules - update to 4.19.91-26
kernel-debug-modules-extra - update to 4.19.91-26
kernel-devel - update to 4.19.91-26
kernel-headers - update to 4.19.91-26
kernel-modules - update to 4.19.91-26
kernel-modules-internal - update to 4.19.91-26
kernel-tools - update to 4.19.91-26
kernel-tools-libs - update to 4.19.91-26
kernel-tools-libs-devel - update to 4.19.91-26
perf - update to 4.19.91-26
python3-perf - update to 4.19.91-26
kernel-debug - update to 4.19.91-26
bpftool - update to 4.19.91-26
kernel - update to 4.19.91-26
python-perf - update to 4.19.91-26
kernel-core - update to 4.19.91-26
linux-4.4.227/kernel-huge - update to 4.4.227
linux-4.4.227/kernel-modules - update to 4.4.227
linux-4.4.227/kernel-generic - update to 4.4.227
linux-4.4.227/kernel-headers - update to 4.4.227_smp

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.1
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a246b4d547708f33ff4d4b9a7a5dbac741dc89d8
• https://github.com/torvalds/linux/commit/a246b4d547708f33ff4d4b9a7a5dbac741dc89d8
• https://security.netapp.com/advisory/ntap-20200430-0004/
• https://usn.ubuntu.com/4345-1/

• Multiple vulnerabilities in Linux kernel
• Red Hat Enterprise Linux 7 update for kernel
• Red Hat Enterprise Linux 7 update for kernel-rt
• CentOS 7 update for kernel
• Anolis OS update for kernel(ANCK)4.19
• Anolis OS update for kernel
• Slackware Linux update for kernel
• Red Hat Enterprise Linux 8 update for kernel
• Ubuntu update for linux, linux-aws, linux-aws-hwe and more