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Vulnerability · Published Dec 16, 2025 · Assigned by Linux

CVE-2025-40354drm/amd/display: increase max link count and fix link->enc NULL pointer access

High 7.8

In plain English

A high-severity 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 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 95.6% 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: drm/amd/display: increase max link count and fix link->enc NULL pointer access [why] 1.) dc->links[MAX_LINKS] array size smaller than actual requested. max_connector + max_dpia + 4 virtual = 14. increase from 12 to 14. 2.) hw_init() access null LINK_ENC for dpia non display_endpoint. (cherry picked from commit d7f5a61e1b04ed87b008c8d327649d184dc5bb45)

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2025-40354
Debian:13linux6.12.57-1DEBIAN-CVE-2025-40354
Debian:14linux6.17.6-1DEBIAN-CVE-2025-40354
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2025-40354
Ubuntu:25.10linux6.17.0-14.14UBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-40354
Ubuntu:25.10linux-aws6.17.0-1007.7UBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-aws-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-40354
Ubuntu:25.10linux-azure6.17.0-1008.8UBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-40354
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-40354
Ubuntu:25.10linux-gcp6.17.0-1007.7UBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1008.8~24.04.1UBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-nvidia-6.176.17.0-1008.8UBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1035.38UBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1011.11UBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-40354
Ubuntu:25.10linux-oracle6.17.0-1007.7UBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-oracle-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-40354
Ubuntu:25.10linux-raspi6.17.0-1008.8UBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-40354
Ubuntu:25.10linux-realtime6.17.0-1006.7UBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-40354
Ubuntu:25.10linux-riscv6.17.0-14.14.1UBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2025-40354
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2025-40354
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2025-40354

Affected products (as reported)

VendorProductVersions
Linux Linux 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c – before f28092be4e12b7df9e4f415d25bf0d767bc2d9ed4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c – before a3fc0d36cfb927f8986b83bf5fba47dbedad3c634562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c – before bec947cbe9a65783adb475a5fb47980d7b4f4796
Linux Linux 4.15

References