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Vulnerability · Published Aug 10, 2026 · Assigned by Linux

CVE-2026-68400firmware: arm_ffa: Fix Endpoint Memory Access Descriptor offset calculation

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 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 97.5% 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: firmware: arm_ffa: Fix Endpoint Memory Access Descriptor offset calculation Use the descriptor's `ep_mem_offset` to calculate the start of the endpoint memory access array and to comply with the FF-A spec instead of defaulting to `sizeof(struct ffa_mem_region)`. This requires moving `ffa_mem_region_additional_setup()` earlier in the setup flow. Also, add sanity checks to ensure the calculated descriptor offsets do not exceed `max_fragsize`.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13linux6.12.115-2DEBIAN-CVE-2026-68400
Debian:14linux7.1.6-1DEBIAN-CVE-2026-68400
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-68400
Ubuntu:26.04:LTSlinux7.0.0-38.38UBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-68400
Ubuntu:26.04:LTSlinux-aws7.0.0-1014.14UBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-aws-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-68400
Ubuntu:26.04:LTSlinux-azure7.0.0-1017.17UBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1017.17~24.04.1UBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-68400
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1016.16UBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-68400
Ubuntu:26.04:LTSlinux-gcp7.0.0-1014.14UBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-68400
Ubuntu:26.04:LTSlinux-gke7.0.0-1008.9UBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-38.38~24.04.4UBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-68400
Ubuntu:26.04:LTSlinux-ibm7.0.0-1015.15UBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-68400
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1024.25~24.04.1UBUNTU-CVE-2026-68400
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2022.23UBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1036.39UBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-68400
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1015.15UBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-68400
Ubuntu:26.04:LTSlinux-oracle7.0.0-1013.13UBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-68400
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-68400
Ubuntu:26.04:LTSlinux-realtime7.0.0-38.38.1UBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-68400
Ubuntu:26.04:LTSlinux-riscv7.0.0-38.38.1UBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-38.38.1~24.04.1UBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-68400
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-68400
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-68400

Affected products (as reported)

VendorProductVersions
Linux Linux 113580530ee7dc61e668b641d657920734533b9f – before 6e902bea625b710f8bf2f40b4ae4b14fa6a33f13113580530ee7dc61e668b641d657920734533b9f – before b39b08e6bee812514b449dc874076890e6b871a0113580530ee7dc61e668b641d657920734533b9f – before 8ef18f0ab3c0ec1eac77289f5a542bd96a8a6d66113580530ee7dc61e668b641d657920734533b9f – before b4d961351aa84fdf0148783fb1f3a1391b8a0adb
Linux Linux 6.7

References