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OpenAdvisories
Medium · 5.5 CVE-2023-4194 EUVD-2023-54072GHSA-9cmp-2g73-ff98

Kernel: tap: tap_open(): correctly initialize socket uid next fix of i_uid to current_fsuid

Published Aug 7, 2023 · Updated Nov 7, 2026 · Assigned by redhat

Vendor: Red Hat Product: Red Hat Enterprise Linux 6 Product: Red Hat Enterprise Linux 7 Product: Red Hat Enterprise Linux 8 Product: Red Hat Enterprise Linux 9 Product: Red Hat Virtualization 4 Package: kernel Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.15 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.4 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-fips Package: linux-azure Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.15 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.4 Package: linux-azure-5.8 Package: linux-azure-6.2 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.15 Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-fips Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.15 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.4 Package: linux-gcp-5.8 Package: linux-gcp-6.2 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.15 Package: linux-hwe-5.19 Package: linux-hwe-5.4 Package: linux-hwe-5.8 Package: linux-hwe-6.2 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.15 Package: linux-ibm-5.4 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-intel-iotg Package: linux-intel-iotg-5.15 Package: linux-iot Package: linux-kvm Package: linux-lowlatency Package: linux-lowlatency-hwe-5.15 Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.2 Package: linux-nvidia Package: linux-nvidia-6.2 Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.6 Package: linux-oem-6.1 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.15 Package: linux-oracle-5.3 Package: linux-oracle-5.4 Package: linux-oracle-5.8 Package: linux-raspi Package: linux-raspi-5.4 Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.15 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-starfive-5.19 Package: linux-xilinx-zynqmp Platform: Linux Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to bypass network filters and gain unauthorized access to some resources. The original patches fixing CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits - a096ccca6e50 ("tun: tun_chr_open(): correctly initialize socket uid"), - 66b2c338adce ("tap: tap_open(): correctly initialize socket uid"), pass "inode->i_uid" to sock_init_data_uid() as the last parameter and that turns out to not be accurate.

Affected products

VendorProductAffectedFixed
Red Hat Red Hat Enterprise Linux 9 — —
Red Hat Red Hat Enterprise Linux 6 — —
Red Hat Red Hat Enterprise Linux 7 — —
Red Hat Red Hat Enterprise Linux 8 — —
Red Hat Red Hat Virtualization 4 — —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 linux 6.4.11-1 —
Debian 13 linux 6.4.11-1 —
Debian 12 linux 6.1.52-1 DSA-5492-1
Debian 11 linux 5.10.191-1 DSA-5480-1
Debian 10 linux-5.10 5.10.197-1~deb10u1 DLA-3623-1
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield 5.15.0-1027.29 —
Ubuntu 24.04 LTS linux-raspi-realtime No fix yet —
Ubuntu 22.04 LTS linux 5.15.0-86.96 USN-6416-1
Ubuntu 22.04 LTS linux-aws 5.15.0-1047.52 USN-6416-1
Ubuntu 22.04 LTS linux-aws-6.2 6.2.0-1013.13~22.04.1 USN-6412-1
Ubuntu 22.04 LTS linux-azure 5.15.0-1049.56 USN-6416-1
Ubuntu 22.04 LTS linux-azure-6.2 +1 6.2.0-1014.14~22.04.1 USN-6412-1
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1049.56.1 USN-6416-1
Ubuntu 22.04 LTS linux-azure-fde-6.2 6.2.0-1014.14~22.04.1.1 USN-6412-1
Ubuntu 22.04 LTS linux-gcp 5.15.0-1044.52 USN-6416-1
Ubuntu 22.04 LTS linux-gcp-6.2 6.2.0-1016.18~22.04.1 USN-6412-1
Ubuntu 22.04 LTS linux-gke +1 5.15.0-1044.49 USN-6416-1
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1030.35 USN-6416-1
Ubuntu 22.04 LTS linux-hwe-6.2 6.2.0-34.34~22.04.1 USN-6412-1
Ubuntu 22.04 LTS linux-ibm +1 5.15.0-1040.43 USN-6416-3, USN-6416-1
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1043.49 USN-6445-1
Ubuntu 22.04 LTS linux-lowlatency 5.15.0-86.95 USN-6416-1
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1037.37 USN-6416-1
Ubuntu 22.04 LTS linux-nvidia-6.2 6.2.0-1011.11 USN-6466-1
Ubuntu 22.04 LTS linux-oem-6.0 6.0.0-1021.21 USN-6385-1
Ubuntu 22.04 LTS linux-oem-6.1 6.1.0-1021.21 USN-6343-1
Ubuntu 22.04 LTS linux-oracle 5.15.0-1045.51 USN-6416-1
Ubuntu 22.04 LTS linux-riscv +10 No fix yet —
Ubuntu 22.04 LTS linux-xilinx-zynqmp 5.15.0-1025.29 —
Ubuntu 20.04 LTS linux 5.4.0-164.181 USN-6417-1
Ubuntu 20.04 LTS linux-aws 5.4.0-1111.120 USN-6417-1
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1047.52~20.04.1 USN-6416-1
Ubuntu 20.04 LTS linux-azure 5.4.0-1117.124 USN-6417-1
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1049.56~20.04.1 USN-6416-1
Ubuntu 20.04 LTS linux-azure-fde-5.15 5.15.0-1049.56~20.04.1.1 USN-6416-1
Ubuntu 20.04 LTS linux-bluefield 5.4.0-1072.78 USN-6417-1
Ubuntu 20.04 LTS linux-gcp 5.4.0-1115.124 USN-6417-1
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1044.52~20.04.1 USN-6416-1
Ubuntu 20.04 LTS linux-gke +26 No fix yet —
Ubuntu 20.04 LTS linux-gkeop 5.4.0-1078.82 USN-6417-1
Ubuntu 20.04 LTS linux-gkeop-5.15 5.15.0-1030.35~20.04.1 USN-6416-1
Ubuntu 20.04 LTS linux-hwe-5.15 5.15.0-86.96~20.04.1 USN-6416-2
Ubuntu 20.04 LTS linux-ibm 5.4.0-1058.63 USN-6417-1
Ubuntu 20.04 LTS linux-ibm-5.15 5.15.0-1040.43~20.04.1 USN-6416-1
Ubuntu 20.04 LTS linux-intel-iotg-5.15 5.15.0-1043.49~20.04.1 USN-6445-2
Ubuntu 20.04 LTS linux-iot 5.4.0-1023.24 USN-6417-1
Ubuntu 20.04 LTS linux-kvm 5.4.0-1100.106 USN-6417-1
Ubuntu 20.04 LTS linux-lowlatency-hwe-5.15 5.15.0-86.95~20.04.1 USN-6416-1
Ubuntu 20.04 LTS linux-oracle 5.4.0-1110.119 USN-6417-1
Ubuntu 20.04 LTS linux-oracle-5.15 5.15.0-1045.51~20.04.1 USN-6416-2
Ubuntu 20.04 LTS linux-raspi 5.4.0-1095.106 USN-6417-1
Ubuntu 20.04 LTS linux-riscv-5.15 5.15.0-1043.47~20.04.1 —
Ubuntu 20.04 LTS linux-xilinx-zynqmp 5.4.0-1031.35 USN-6417-1
Ubuntu 18.04 LTS linux-gcp +13 No fix yet —
Show 4 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro Realtime 22.04 LTS linux-intel-iot-realtime 5.15.0-1040.42 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1048.54 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-aws-fips 5.4.0-1111.120+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-azure-fips 5.4.0-1117.124+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-fips 5.4.0-1086.95 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-gcp-fips 5.4.0-1115.124+fips1 —
Ubuntu Pro 18.04 LTS linux-aws-5.4 5.4.0-1111.120~18.04.1 USN-6417-1
Ubuntu Pro 18.04 LTS linux-azure-5.4 5.4.0-1117.124~18.04.1 USN-6417-1
Ubuntu Pro 18.04 LTS linux-gcp-5.4 5.4.0-1115.124~18.04.1 USN-6417-1
Ubuntu Pro 18.04 LTS linux-hwe-5.4 5.4.0-164.181~18.04.1 USN-6417-1
Ubuntu Pro 18.04 LTS linux-ibm-5.4 5.4.0-1058.63~18.04.1 USN-6417-1
Ubuntu Pro 18.04 LTS linux-oracle-5.4 5.4.0-1110.119~18.04.1 USN-6417-1
Ubuntu Pro 18.04 LTS linux-raspi-5.4 5.4.0-1095.106~18.04.1 USN-6417-1
ReleasePackageFixed inAdvisory
RHEL 9 bpftool 7.2.0-362.8.1.el9_3 RHSA-2023:6583
RHEL 9 rv +64 5.14.0-362.8.1.el9_3 RHSA-2023:6583
ReleasePackageFixed inAdvisory
SLES 15 SP5 kernel-64kb +6 5.14.21-150500.55.28.1 SUSE-SU-2023:3971-1
SLES 15 SP5 kernel-azure +2 5.14.21-150500.33.17.1 SUSE-SU-2023:3656-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.28.1.150500.6.11.2 SUSE-SU-2023:3971-1
SLES 15 SP4 kernel-64kb +6 5.14.21-150400.24.88.1 SUSE-SU-2023:3969-1
SLES 15 SP4 kernel-azure +2 5.14.21-150400.14.66.1 SUSE-SU-2023:3682-1
SLES 15 SP4 kernel-default-base 5.14.21-150400.24.88.1.150400.24.40.1 SUSE-SU-2023:3969-1
SLES 15 SP3 kernel-64kb +7 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SLES 15 SP3 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
SLES 15 SP2 kernel-default +2 5.3.18-150200.24.160.2 SUSE-SU-2023:3390-1
SLES 15 SP2 kernel-default-base 5.3.18-150200.24.160.2.150200.9.79.2 SUSE-SU-2023:3390-1
SLES 15 SP2 kernel-docs 5.3.18-150200.24.160.3 SUSE-SU-2023:3390-1
SLES 15 SP2 kernel-syms +1 5.3.18-150200.24.160.1 SUSE-SU-2023:3390-1
SLES 15 SP1 kernel-docs +5 4.12.14-150100.197.154.1 SUSE-SU-2023:3392-1
Show 25 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES 12 SP5 kernel-azure +2 4.12.14-16.149.1 SUSE-SU-2023:3681-1
SLES 12 SP5 kernel-docs +4 4.12.14-122.176.1 SUSE-SU-2023:3705-1
SLES for SAP 15 SP3 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
SLES for SAP 15 SP3 kernel-docs +5 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SLES for SAP 15 SP2 kernel-default +2 5.3.18-150200.24.160.2 SUSE-SU-2023:3390-1
SLES for SAP 15 SP2 kernel-default-base 5.3.18-150200.24.160.2.150200.9.79.2 SUSE-SU-2023:3390-1
SLES for SAP 15 SP2 kernel-docs 5.3.18-150200.24.160.3 SUSE-SU-2023:3390-1
SLES for SAP 15 SP2 kernel-syms +1 5.3.18-150200.24.160.1 SUSE-SU-2023:3390-1
SLES for SAP 15 SP1 kernel-docs +4 4.12.14-150100.197.154.1 SUSE-SU-2023:3392-1
SLES for SAP 12 SP5 kernel-azure +2 4.12.14-16.149.1 SUSE-SU-2023:3681-1
SLES for SAP 12 SP5 kernel-syms +2 4.12.14-122.176.1 SUSE-SU-2023:3705-1
SLE Real Time 12 SP5 kernel-rt +3 4.12.14-10.141.1 SUSE-SU-2023:3601-1
SLE Micro 5.5 kernel-default 5.14.21-150500.55.28.1 SUSE-SU-2023:3971-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.28.1.150500.6.11.2 SUSE-SU-2023:3971-1
SLE Micro 5.5 kernel-rt 5.14.21-150500.13.18.1 SUSE-SU-2023:3988-1
SLE Micro 5.4 kernel-default 5.14.21-150400.24.88.1 SUSE-SU-2023:3969-1
SLE Micro 5.4 kernel-default-base 5.14.21-150400.24.88.1.150400.24.40.1 SUSE-SU-2023:3969-1
SLE Micro 5.4 kernel-rt 5.14.21-150400.15.53.1 SUSE-SU-2023:3964-1
SLE Micro 5.3 kernel-default 5.14.21-150400.24.88.1 SUSE-SU-2023:3969-1
SLE Micro 5.3 kernel-default-base 5.14.21-150400.24.88.1.150400.24.40.1 SUSE-SU-2023:3969-1
SLE Micro 5.3 kernel-rt 5.14.21-150400.15.53.1 SUSE-SU-2023:3964-1
SLE Micro 5.2 kernel-default 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SLE Micro 5.2 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
SLE Micro 5.2 kernel-rt 5.3.18-150300.141.1 SUSE-SU-2023:3785-1
SLE Micro 5.1 kernel-default 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SLE Micro 5.1 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
SLE Micro 5.1 kernel-rt 5.3.18-150300.141.1 SUSE-SU-2023:3785-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.28.1 SUSE-SU-2023:3971-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5-RT_Update_4 +1 1-150500.11.3.1 SUSE-SU-2023:3988-1, SUSE-SU-2023:3599-2, SUSE-SU-2023:3599-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_5 1-150500.11.5.1 SUSE-SU-2023:3971-1
SLE Live Patching 15 SP4 kernel-default 5.14.21-150400.24.88.1 SUSE-SU-2023:3969-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4-RT_Update_12 +1 1-150400.1.3.1 SUSE-SU-2023:3964-1, SUSE-SU-2023:3600-2, SUSE-SU-2023:3600-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_18 1-150400.9.3.1 SUSE-SU-2023:3969-1
SLE Live Patching 15 SP3 kernel-default 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_36 1-150300.7.3.1 SUSE-SU-2023:3684-1
SLE Live Patching 15 SP2 kernel-default 5.3.18-150200.24.160.2 SUSE-SU-2023:3390-1
SLE Live Patching 15 SP2 kernel-livepatch-SLE15-SP2_Update_39 1-150200.5.3.2 SUSE-SU-2023:3390-1
SLE Live Patching 15 SP1 kernel-default 4.12.14-150100.197.154.1 SUSE-SU-2023:3392-1
SLE Live Patching 15 SP1 kernel-livepatch-SLE15-SP1_Update_43 1-150100.3.3.1 SUSE-SU-2023:3392-1
SLE Live Patching 12 SP5 kernel-default 4.12.14-122.176.1 SUSE-SU-2023:3705-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_48 1-8.3.1 SUSE-SU-2023:3705-1
SLE HPC 15 SP3 kernel-64kb +6 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SLE HPC 15 SP3 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
SLE HPC 15 SP2 kernel-default +2 5.3.18-150200.24.160.2 SUSE-SU-2023:3390-1
SLE HPC 15 SP2 kernel-default-base 5.3.18-150200.24.160.2.150200.9.79.2 SUSE-SU-2023:3390-1
SLE HPC 15 SP2 kernel-docs 5.3.18-150200.24.160.3 SUSE-SU-2023:3390-1
SLE HPC 15 SP2 kernel-syms +1 5.3.18-150200.24.160.1 SUSE-SU-2023:3390-1
SLE HPC 15 SP1 kernel-docs +4 4.12.14-150100.197.154.1 SUSE-SU-2023:3392-1
SUSE Real Time Module 15 SP5 kernel-rt +3 5.14.21-150500.13.18.1 SUSE-SU-2023:3988-1
SUSE Real Time Module 15 SP4 kernel-rt +3 5.14.21-150400.15.53.1 SUSE-SU-2023:3964-1
SUSE Manager Server 4.2 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
SUSE Manager Server 4.2 kernel-source +3 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SUSE Manager Proxy 4.2 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
SUSE Manager Proxy 4.2 kernel-source +2 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SUSE Enterprise Storage 7.1 kernel-64kb +6 5.3.18-150300.59.133.1 SUSE-SU-2023:3684-1
SUSE Enterprise Storage 7.1 kernel-default-base 5.3.18-150300.59.133.1.150300.18.78.1 SUSE-SU-2023:3684-1
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed kernel-source 6.4.11-1.1 openSUSE-SU-2024:13704-1, openSUSE-SU-2024:13145-1
openSUSE Leap 15.5 dtb-aarch64 +10 5.14.21-150500.55.28.1 SUSE-SU-2023:3971-1
openSUSE Leap 15.5 kernel-azure +2 5.14.21-150500.33.17.1 SUSE-SU-2023:3656-1
openSUSE Leap 15.5 kernel-default-base 5.14.21-150500.55.28.1.150500.6.11.2 SUSE-SU-2023:3971-1
openSUSE Leap 15.5 kernel-rt +3 5.14.21-150500.13.18.1 SUSE-SU-2023:3988-1
openSUSE Leap 15.5 kernel-vanilla 4.12.14-150100.197.154.1 SUSE-SU-2023:3392-1
openSUSE Leap 15.4 dtb-aarch64 5.3.18-150300.59.133.1 SUSE-SU-2023:3969-1, SUSE-SU-2023:3684-1
openSUSE Leap 15.4 kernel-64kb +5 5.14.21-150400.24.88.1 SUSE-SU-2023:3969-1
openSUSE Leap 15.4 kernel-azure +2 5.14.21-150400.14.66.1 SUSE-SU-2023:3682-1
openSUSE Leap 15.4 kernel-debug +4 4.12.14-150100.197.154.1 SUSE-SU-2023:3969-1, SUSE-SU-2023:3392-1
openSUSE Leap 15.4 kernel-default-base 5.14.21-150400.24.88.1.150400.24.40.1 SUSE-SU-2023:3969-1
openSUSE Leap 15.4 kernel-rt +3 5.14.21-150400.15.53.1 SUSE-SU-2023:3964-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.1.49-69.116 1.0-0.amzn2023 ALAS2023-2023-330
Amazon Linux 2023 perf +12 6.1.49-69.116.amzn2023 ALAS2023-2023-330

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 2 (CBL-Mariner) kernel 5.15.126.1-1 —

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 9 bpftool 7.2.0-362.8.1.el9_3 ELSA-2023-6583
Oracle Linux 9 rv +25 5.14.0-362.8.1.el9_3 ELSA-2023-6583

Advisories 38

References