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Vulnerability · Published Apr 14, 2023 · Assigned by redhat

CVE-2023-2008Kernel: udmabuf: improper validation of array index leading to local privilege escalation

High 8.2

In plain English

A high-severity security flaw in 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 1.0% (higher than 63% 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)8.2High
Exploit odds (30 days)1.0%top 36.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

Official description

A flaw was found in the Linux kernel's udmabuf device driver, within a fault handler. This issue occurs due to the lack of proper validation of user-supplied data, which can result in memory access past the end of an array. This may allow an attacker to escalate privileges and execute arbitrary code in the context of the kernel.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.18.14-1DEBIAN-CVE-2023-2008
Debian:13linux5.18.14-1DEBIAN-CVE-2023-2008
Debian:14linux5.18.14-1DEBIAN-CVE-2023-2008
Ubuntu:22.04:LTSlinux5.15.0-48.54UBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-aws5.15.0-1020.24UBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-azure5.15.0-1020.25UBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1024.30.1UBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-gcp5.15.0-1018.24UBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-gke5.15.0-1016.19UBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1003.5UBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-ibm5.15.0-1015.17UBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1016.21UBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-kvm5.15.0-1018.22UBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-48.54UBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1007.7UBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-oracle5.15.0-1018.23UBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-raspi5.15.0-1015.17UBUNTU-CVE-2023-2008
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-2008
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-2008

Affected products (as reported)

VendorProductVersions
Linux kernel 4.20 – before 5.4.2025.5 – before 5.10.1275.11 – before 5.15.515.16 – before 5.18.8
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 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8 see references

Weakness: CWE-129 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References