Incorrect default permissions in Linux kernel - CVE-2020-26088

Vulnerability identifier: #VU92767

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-26088

CWE-ID: CWE-276

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to manipulate data.

A missing CAP_NET_RAW check in NFC socket creation in net/nfc/rawsock.c in the Linux kernel before 5.8.2 could be used by local attackers to create raw sockets, bypassing security mechanisms, aka CID-26896f01467a.

Linux kernel
Slackware Linux
Ubuntu
openEuler
linux-4.4.240/kernel-modules
linux-4.4.240/kernel-huge
linux-4.4.240/kernel-generic
linux-4.4.240/kernel-headers
linux-image-lowlatency-hwe-16.04 (Ubuntu package)
linux-image-generic-lpae-hwe-16.04 (Ubuntu package)
linux-image-generic-hwe-16.04 (Ubuntu package)
linux-image-virtual-hwe-16.04 (Ubuntu package)
linux-image-oem (Ubuntu package)
linux-image-4.15.0-120-lowlatency (Ubuntu package)
linux-image-4.15.0-120-generic-lpae (Ubuntu package)
linux-image-4.15.0-120-generic (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-4.15.0-121-lowlatency (Ubuntu package)
linux-image-4.15.0-121-generic-lpae (Ubuntu package)
linux-image-4.15.0-121-generic (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-4.15.0-1056-oracle (Ubuntu package)
linux-image-4.15.0-1057-oracle (Ubuntu package)
linux-image-oracle-lts-18.04 (Ubuntu package)
linux-image-gke-4.15 (Ubuntu package)
linux-image-4.15.0-1072-gke (Ubuntu package)
linux-image-gke (Ubuntu package)
linux-image-raspi2 (Ubuntu package)
linux-image-4.15.0-1073-raspi2 (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-4.15.0-1077-kvm (Ubuntu package)
linux-image-aws-hwe (Ubuntu package)
linux-image-4.15.0-1085-aws (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-aws-lts-18.04 (Ubuntu package)
linux-image-4.15.0-1086-aws (Ubuntu package)
linux-image-4.15.0-1086-gcp (Ubuntu package)
linux-image-gcp-lts-18.04 (Ubuntu package)
linux-image-snapdragon (Ubuntu package)
linux-image-4.15.0-1089-snapdragon (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-4.15.0-1098-azure (Ubuntu package)
linux-image-azure-lts-18.04 (Ubuntu package)
linux-image-4.15.0-1099-oem (Ubuntu package)
linux-image-4.15.0-1099-azure (Ubuntu package)
bpftool-debuginfo
bpftool
python3-perf-debuginfo
python3-perf
python2-perf-debuginfo
python2-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-devel
kernel-debugsource
kernel-debuginfo
kernel

Install update from vendor's repository.

linux-4.4.240/kernel-modules - update to 4.4.240
linux-4.4.240/kernel-huge - update to 4.4.240
linux-4.4.240/kernel-generic - update to 4.4.240
linux-4.4.240/kernel-headers - update to 4.4.240_smp
linux-image-lowlatency-hwe-16.04 (Ubuntu package) - update to 4.15.0.120.121
linux-image-generic-lpae-hwe-16.04 (Ubuntu package) - update to 4.15.0.120.121
linux-image-generic-hwe-16.04 (Ubuntu package) - update to 4.15.0.120.121
linux-image-virtual-hwe-16.04 (Ubuntu package) - update to 4.15.0.120.121
linux-image-oem (Ubuntu package) - addressed in versions 4.15.0.120.121, 4.15.0.1099.103
linux-image-4.15.0-120-lowlatency (Ubuntu package) - update to 4.15.0-120.122~16.04.1
linux-image-4.15.0-120-generic-lpae (Ubuntu package) - update to 4.15.0-120.122~16.04.1
linux-image-4.15.0-120-generic (Ubuntu package) - update to 4.15.0-120.122~16.04.1
linux-image-lowlatency (Ubuntu package) - update to 4.15.0.121.108
linux-image-generic-lpae (Ubuntu package) - update to 4.15.0.121.108
linux-image-generic (Ubuntu package) - update to 4.15.0.121.108
linux-image-virtual (Ubuntu package) - update to 4.15.0.121.108
linux-image-4.15.0-121-lowlatency (Ubuntu package) - update to 4.15.0-121.123
linux-image-4.15.0-121-generic-lpae (Ubuntu package) - update to 4.15.0-121.123
linux-image-4.15.0-121-generic (Ubuntu package) - update to 4.15.0-121.123
linux-image-oracle (Ubuntu package) - update to 4.15.0.1056.46
linux-image-4.15.0-1056-oracle (Ubuntu package) - update to 4.15.0-1056.61~16.04.1
linux-image-4.15.0-1057-oracle (Ubuntu package) - update to 4.15.0-1057.62
linux-image-oracle-lts-18.04 (Ubuntu package) - update to 4.15.0.1057.67
linux-image-gke-4.15 (Ubuntu package) - update to 4.15.0.1072.76
linux-image-4.15.0-1072-gke (Ubuntu package) - update to 4.15.0-1072.76
linux-image-gke (Ubuntu package) - addressed in versions 4.15.0.1072.76, 4.15.0.1086.87
linux-image-raspi2 (Ubuntu package) - update to 4.15.0.1073.70
linux-image-4.15.0-1073-raspi2 (Ubuntu package) - update to 4.15.0-1073.78
linux-image-kvm (Ubuntu package) - update to 4.15.0.1077.73
linux-image-4.15.0-1077-kvm (Ubuntu package) - update to 4.15.0-1077.79
linux-image-aws-hwe (Ubuntu package) - update to 4.15.0.1085.81
linux-image-4.15.0-1085-aws (Ubuntu package) - update to 4.15.0-1085.90~16.04.1
linux-image-gcp (Ubuntu package) - update to 4.15.0.1086.87
linux-image-aws-lts-18.04 (Ubuntu package) - update to 4.15.0.1086.88
linux-image-4.15.0-1086-aws (Ubuntu package) - update to 4.15.0-1086.91
linux-image-4.15.0-1086-gcp (Ubuntu package) - addressed in versions 4.15.0-1086.98, 4.15.0-1086.98~16.04.1
linux-image-gcp-lts-18.04 (Ubuntu package) - update to 4.15.0.1086.104
linux-image-snapdragon (Ubuntu package) - update to 4.15.0.1089.92
linux-image-4.15.0-1089-snapdragon (Ubuntu package) - update to 4.15.0-1089.98
linux-image-azure (Ubuntu package) - addressed in versions 4.15.0.1098.74, 4.15.0.1098.92
linux-image-4.15.0-1098-azure (Ubuntu package) - addressed in versions 4.15.0-1098.109~14.04.1, 4.15.0-1098.109~16.04.1
linux-image-azure-lts-18.04 (Ubuntu package) - update to 4.15.0.1099.72
linux-image-4.15.0-1099-oem (Ubuntu package) - update to 4.15.0-1099.109
linux-image-4.15.0-1099-azure (Ubuntu package) - update to 4.15.0-1099.110
bpftool-debuginfo - update to 4.19.90-2010.2.0.0046
bpftool - update to 4.19.90-2010.2.0.0046
python3-perf-debuginfo - update to 4.19.90-2010.2.0.0046
python3-perf - update to 4.19.90-2010.2.0.0046
python2-perf-debuginfo - update to 4.19.90-2010.2.0.0046
python2-perf - update to 4.19.90-2010.2.0.0046
perf-debuginfo - update to 4.19.90-2010.2.0.0046
perf - update to 4.19.90-2010.2.0.0046
kernel-tools-devel - update to 4.19.90-2010.2.0.0046
kernel-tools-debuginfo - update to 4.19.90-2010.2.0.0046
kernel-tools - update to 4.19.90-2010.2.0.0046
kernel-source - update to 4.19.90-2010.2.0.0046
kernel-devel - update to 4.19.90-2010.2.0.0046
kernel-debugsource - update to 4.19.90-2010.2.0.0046
kernel-debuginfo - update to 4.19.90-2010.2.0.0046
kernel - update to 4.19.90-2010.2.0.0046

• https://github.com/torvalds/linux/commit/26896f01467a28651f7a536143fe5ac8449d4041
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.2
• https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html
• https://usn.ubuntu.com/4578-1/
• https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
• https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html

• Incorrect default permissions in Linux kernel
• Ubuntu update for linux
• Slackware Linux update for kernel
• openEuler 20.03 LTS update for kernel