Input validation error in Linux kernel - CVE-2020-12769

Vulnerability identifier: #VU28171

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-2020-12769

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 insufficient validation of user-supplied input in the "drivers/spi/spi-dw.c" file. A local user can cause a panic via concurrent calls to "dw_spi_irq" and "dw_spi_transfer_one" and perform a denial of service (DoS) attack.

Linux kernel
Anolis OS
Slackware Linux
linux-4.4.227/kernel-generic
linux-4.4.227/kernel-huge
linux-4.4.227/kernel-modules
linux-4.4.227/kernel-headers
bpftool
kernel
kernel-debug
kernel-debug-devel
kernel-devel
kernel-headers
kernel-tools
kernel-tools-libs
kernel-tools-libs-devel
perf
python-perf

Install updates from vendor's website.

Linux kernel - update to 5.4.17
linux-4.4.227/kernel-generic - update to 4.4.227
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-headers - update to 4.4.227_smp
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
kernel-devel - update to 4.19.91-26
kernel-headers - 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
python-perf - update to 4.19.91-26

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.17
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19b61392c5a852b4e8a0bf35aecb969983c5932d
• https://lkml.org/lkml/2020/2/3/559

• Denial of service in Linux kernel
• Anolis OS update for kernel(ANCK)4.19
• Slackware Linux update for kernel