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Vulnerability · Published Jul 24, 2023 · Assigned by redhat

CVE-2023-3812Kernel: tun: bugs for oversize packet when napi frags enabled in tun_napi_alloc_frags

High 7.8

In plain English

A high-severity out-of-bounds write in Red Hat Enterprise Linux 6 from Red Hat. 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 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.3%top 71.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

An out-of-bounds memory access flaw was found in the Linux kernel’s TUN/TAP device driver functionality in how a user generates a malicious (too big) networking packet when napi frags is enabled. This flaw allows a local user to crash or potentially escalate their privileges on the system.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-abi-stablelists4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-core4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-cross-headers4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-debug4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-debug-core4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-debug-devel4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-debug-modules4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-debug-modules-extra4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-devel4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-doc4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-modules4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-modules-extra4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-tools4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-tools-libs4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-tools-libs-devel4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-zfcpdump4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-zfcpdump-core4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-zfcpdump-devel4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-zfcpdump-modules4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8perf4.18.0-513.9.1.el8_9ALSA-2023:7549
AlmaLinux:8python3-perf4.18.0-513.9.1.el8_9ALSA-2023:7549
Debian:12linux6.0.8-1DEBIAN-CVE-2023-3812
Debian:13linux6.0.8-1DEBIAN-CVE-2023-3812
Debian:14linux6.0.8-1DEBIAN-CVE-2023-3812
Rocky Linux:8kernel0:4.18.0-513.9.1.el8_9RLSA-2023:7549
Rocky Linux:8kernel0:4.18.0-513.9.1.el8_9.cloudRXSA-2023:7549
Rocky Linux:8kernel-rt0:4.18.0-513.9.1.rt7.311.el8_9RLSA-2023:7548
Ubuntu:22.04:LTSlinux5.15.0-60.66UBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-aws5.15.0-1030.34UBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-azure5.15.0-1033.40UBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1033.40.1UBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-gcp5.15.0-1029.36UBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-gke5.15.0-1027.32UBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1015.19UBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-hwe-5.195.19.0-32.33~22.04.1UBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-ibm5.15.0-1025.28UBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1025.30UBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-kvm5.15.0-1028.33UBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-60.66UBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1017.17UBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-oem-6.06.0.0-1008.8UBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-oracle5.15.0-1029.35UBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-raspi5.15.0-1024.26UBUNTU-CVE-2023-3812
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-3812
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-3812

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support see references
Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support see references
Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 6 see references

Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References