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Vulnerability · Published Oct 28, 2025 · Assigned by Linux

CVE-2025-40065RISC-V: KVM: Write hgatp register with valid mode bits

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 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 85.1% 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: RISC-V: KVM: Write hgatp register with valid mode bits According to the RISC-V Privileged Architecture Spec, when MODE=Bare is selected,software must write zero to the remaining fields of hgatp. We have detected the valid mode supported by the HW before, So using a valid mode to detect how many vmid bits are supported.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2025-40065
Debian:13linux6.12.115-2DEBIAN-CVE-2025-40065
Debian:14linux6.17.6-1DEBIAN-CVE-2025-40065
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2025-40065
Ubuntu:25.10linux6.17.0-14.14USN-8029-1
Ubuntu:25.10linux6.17.0-14.14UBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-40065
Ubuntu:25.10linux-aws6.17.0-1007.7UBUNTU-CVE-2025-40065
Ubuntu:25.10linux-aws6.17.0-1007.7USN-8029-2
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-aws-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-40065
Ubuntu:25.10linux-azure6.17.0-1008.8USN-8029-3
Ubuntu:25.10linux-azure6.17.0-1008.8UBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-40065
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-40065
Ubuntu:25.10linux-gcp6.17.0-1007.7UBUNTU-CVE-2025-40065
Ubuntu:25.10linux-gcp6.17.0-1007.7USN-8030-1
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1008.8~24.04.1UBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-nvidia-6.176.17.0-1008.8UBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1011.11USN-8048-1
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1011.11UBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-40065
Ubuntu:25.10linux-oracle6.17.0-1007.7USN-8029-2
Ubuntu:25.10linux-oracle6.17.0-1007.7UBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-oracle-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-40065
Ubuntu:25.10linux-raspi6.17.0-1008.8UBUNTU-CVE-2025-40065
Ubuntu:25.10linux-raspi6.17.0-1008.8USN-8029-1
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-40065
Ubuntu:25.10linux-realtime6.17.0-1006.7USN-8029-1
Ubuntu:25.10linux-realtime6.17.0-1006.7UBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-40065
Ubuntu:25.10linux-riscv6.17.0-14.14.1UBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-40065
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2025-40065
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2025-40065

Affected products (as reported)

VendorProductVersions
Linux Linux fd7bb4a251dfc1da3496bf59a4793937c13e8c1f – before feb64ca53d97b3ac8ba9ecbeae5f9426f1513650fd7bb4a251dfc1da3496bf59a4793937c13e8c1f – before 8b6e327736db013b9e385c3f6f9f0b04ddf26e43fd7bb4a251dfc1da3496bf59a4793937c13e8c1f – before 5cba8ae00279296a586d0596443109d601b1d116fd7bb4a251dfc1da3496bf59a4793937c13e8c1f – before d00b61cd37f4c183ce0edbc9f8ccf6d5430ea357fd7bb4a251dfc1da3496bf59a4793937c13e8c1f – before 2b351e3d04be9e1533f26c3464f1e44a5beace30
Linux Linux 5.16

References