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 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 Server
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
kernel (Red Hat package)
kernel-rt (Red Hat package)
linux-4.4.227/kernel-modules
linux-4.4.227/kernel-huge
linux-4.4.227/kernel-generic
linux-4.4.227/kernel-headers
kernel-devel
bpftool
kernel
kernel-debug
kernel-debug-devel
python3-perf
perf
kernel-tools-libs-devel
kernel-tools-libs
kernel-tools
kernel-modules-internal
kernel-modules-extra
kernel-modules
kernel-headers
kernel-debug-modules-extra
kernel-debug-modules
kernel-debug-core
kernel-core
python-perf

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-4.4.227/kernel-modules - update to 4.4.227
linux-4.4.227/kernel-huge - 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
kernel-devel - update to 4.19.91-26
bpftool - update to 4.19.91-26
kernel - update to 4.19.91-26
kernel-debug - update to 4.19.91-26
kernel-debug-devel - update to 4.19.91-26
python3-perf - update to 4.19.91-26
perf - update to 4.19.91-26
kernel-tools-libs-devel - update to 4.19.91-26
kernel-tools-libs - update to 4.19.91-26
kernel-tools - update to 4.19.91-26
kernel-modules-internal - update to 4.19.91-26
kernel-modules-extra - update to 4.19.91-26
kernel-modules - update to 4.19.91-26
kernel-headers - update to 4.19.91-26
kernel-debug-modules-extra - update to 4.19.91-26
kernel-debug-modules - update to 4.19.91-26
kernel-debug-core - update to 4.19.91-26
kernel-core - update to 4.19.91-26
python-perf - update to 4.19.91-26

• 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