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Vulnerability · Published Mar 27, 2023 · Assigned by redhat

CVE-2023-1076

Medium 5.5

In plain English

A medium-severity security flaw in Linux kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.3%top 83.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in the Linux Kernel. The tun/tap sockets have their socket UID hardcoded to 0 due to a type confusion in their initialization function. While it will be often correct, as tuntap devices require CAP_NET_ADMIN, it may not always be the case, e.g., a non-root user only having that capability. This would make tun/tap sockets being incorrectly treated in filtering/routing decisions, possibly bypassing network filters.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.20-1DEBIAN-CVE-2023-1076
Debian:13linux6.1.20-1DEBIAN-CVE-2023-1076
Debian:14linux6.1.20-1DEBIAN-CVE-2023-1076
Ubuntu:22.04:LTSlinux5.15.0-75.82USN-6172-1
Ubuntu:22.04:LTSlinux5.15.0-75.82UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-aws5.15.0-1038.43USN-6172-1
Ubuntu:22.04:LTSlinux-aws5.15.0-1038.43UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-azure5.15.0-1040.47UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-azure5.15.0-1040.47USN-6172-1
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1041.48.1UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1041.48.1USN-6223-1
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-gcp5.15.0-1036.44UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-gcp5.15.0-1036.44USN-6172-1
Ubuntu:22.04:LTSlinux-gke5.15.0-1036.41UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-gke5.15.0-1036.41USN-6172-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1022.27UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1022.27USN-6172-1
Ubuntu:22.04:LTSlinux-hwe-5.195.19.0-45.46~22.04.1UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-hwe-5.195.19.0-45.46~22.04.1USN-6171-1
Ubuntu:22.04:LTSlinux-ibm5.15.0-1032.35UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-ibm5.15.0-1032.35USN-6172-1
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1033.38UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1033.38USN-6207-1
Ubuntu:22.04:LTSlinux-kvm5.15.0-1035.40UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-kvm5.15.0-1035.40USN-6172-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-75.82USN-6172-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-75.82UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1027.27UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1015.15UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-oem-6.06.0.0-1021.21USN-6385-1
Ubuntu:22.04:LTSlinux-oem-6.06.0.0-1021.21UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-oem-6.16.1.0-1009.9USN-6033-1
Ubuntu:22.04:LTSlinux-oem-6.16.1.0-1009.9UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-oracle5.15.0-1037.43UBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-oracle5.15.0-1037.43USN-6172-1
Ubuntu:22.04:LTSlinux-raspi5.15.0-1032.35USN-6172-1
Ubuntu:22.04:LTSlinux-raspi5.15.0-1032.35UBUNTU-CVE-2023-1076
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-1076
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-1076

Affected products (as reported)

VendorProductVersions
n/a Linux kernel unknown

Weakness: CWE-791 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

References