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Vulnerability · Published Dec 9, 2025 · Assigned by Linux

CVE-2023-53840usb: early: xhci-dbc: Fix a potential out-of-bound memory access

Unrated

In plain English

A security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 84.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: usb: early: xhci-dbc: Fix a potential out-of-bound memory access If xdbc_bulk_write() fails, the values in 'buf' can be anything. So the string is not guaranteed to be NULL terminated when xdbc_trace() is called. Reserve an extra byte, which will be zeroed automatically because 'buf' is a static variable, in order to avoid troubles, should it happen.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.20-1DEBIAN-CVE-2023-53840
Debian:13linux6.1.20-1DEBIAN-CVE-2023-53840
Debian:14linux6.1.20-1DEBIAN-CVE-2023-53840
Ubuntu:22.04:LTSlinux5.15.0-75.82UBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-aws5.15.0-1038.43UBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-azure5.15.0-1040.47UBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-53840
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1041.48.1UBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-gcp5.15.0-1036.44UBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-53840
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-gke5.15.0-1036.41UBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1022.27UBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-53840
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-ibm5.15.0-1032.35UBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1033.38UBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-kvm5.15.0-1035.40UBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-75.82UBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-53840
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1027.27UBUNTU-CVE-2023-53840
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1015.15UBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-53840
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-53840
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-oracle5.15.0-1037.43UBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-raspi5.15.0-1032.35UBUNTU-CVE-2023-53840
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53840
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-53840
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-53840
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-53840
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-53840

Affected products (as reported)

VendorProductVersions
Linux Linux aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0 – before e8fb0f13e45cf361fd06593d3cb2d89915cd3bd0aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0 – before 351c8d8650d1ccc006255fa01f98b6c6496a02e5aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0 – before df7c8aba7309f4dc55df94e06b67f576c0f52406aeb9dd1de98c1a5f2007ea5d2a154c1244caf8a0 – before a4a97ab3db5c081eb6e7dba91306adefb461e0bd
Linux Linux 4.12

References