Vulnerability · Published Sep 20, 2023 · Assigned by Google
CVE-2023-2163Incorrect Verifier Branch Pruning Logic Leads To Arbitrary Read/Write In Linux Kernel and Lateral Privilege Escalation
Critical 10.0
In plain English
A critical-severity security flaw in Linux Kernel from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.6% (higher than 90% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)10.0Critical
Exploit odds (30 days)3.6%top 10.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
Incorrect verifier pruning in BPF in Linux Kernel >=5.4 leads to unsafe code paths being incorrectly marked as safe, resulting in arbitrary read/write in kernel memory, lateral privilege escalation, and container escape.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | bpftool | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-abi-stablelists | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-core | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-cross-headers | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-debug | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-debug-core | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-debug-devel | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-debug-modules | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-debug-modules-extra | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-devel | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-doc | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-modules | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-modules-extra | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-tools | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-tools-libs | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-zfcpdump | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-zfcpdump-core | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-zfcpdump-devel | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-zfcpdump-modules | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | kernel-zfcpdump-modules-extra | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | perf | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| AlmaLinux:8 | python3-perf | 4.18.0-513.9.1.el8_9 | ALSA-2023:7549 |
| Debian:12 | linux | 6.1.27-1 | DEBIAN-CVE-2023-2163 |
| Debian:13 | linux | 6.1.27-1 | DEBIAN-CVE-2023-2163 |
| Debian:14 | linux | 6.1.27-1 | DEBIAN-CVE-2023-2163 |
| Rocky Linux:8 | kernel | 0:4.18.0-513.9.1.el8_9.cloud | RXSA-2023:7549 |
| Rocky Linux:8 | kernel | 0:4.18.0-513.9.1.el8_9 | RLSA-2023:7549 |
| Rocky Linux:8 | kernel-rt | 0:4.18.0-513.9.1.rt7.311.el8_9 | RLSA-2023:7548 |
| Ubuntu:22.04:LTS | linux | 5.15.0-79.86 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux | 5.15.0-79.86 | USN-6300-1 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | no fix listed | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1042.47 | USN-6300-1 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1042.47 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | 6.2.0-1007.7~22.04.1 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1045.52 | USN-6332-1 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1045.52 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1045.52.1 | USN-6332-1 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1044.51.1 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1039.47 | USN-6300-1 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1039.47 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1039.44 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1039.44 | USN-6311-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1025.30 | USN-6311-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1025.30 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | no fix listed | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1035.38 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1035.38 | USN-6300-1 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1037.42 | USN-6300-1 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1037.42 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1039.44 | USN-6300-1 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1039.44 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-79.88 | USN-6300-1 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-79.88 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1030.30 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1030.30 | USN-6300-1 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | 6.2.0-1009.9 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra | 5.15.0-1016.16 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra-igx | 5.15.0-1002.2 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | 6.0.0-1021.21 | USN-6385-1 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | 6.0.0-1021.21 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | 6.1.0-1014.14 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1040.46 | USN-6300-1 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1040.46 | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1035.38 | USN-6300-1 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1035.38 | UBUNTU-CVE-2023-2163 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2023-2163 |
| Ubuntu:22.04:LTS | linux-xilinx-zynqmp | 5.15.0-1025.29 | UBUNTU-CVE-2023-2163 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | 0 – before 71b547f561247897a0a14f3082730156c0533fed |
Weakness: CWE-682 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N