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Vulnerability · Published Jul 19, 2026 · Assigned by Linux

CVE-2026-64042vfio/pci: Check BAR resources before exporting a DMABUF

High 8.8

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)8.8High
Exploit odds (30 days)0.1%top 96.5% 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: vfio/pci: Check BAR resources before exporting a DMABUF A DMABUF exports access to BAR resources and, although they are requested at startup time, we need to ensure they really were reserved before exporting. Otherwise, it's possible to access unreserved resources through the export. Add a check to the DMABUF-creation path.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10kernel6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-64k6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-64k-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-64k-debug6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-64k-debug-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-64k-debug-devel6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-64k-debug-devel-matched6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-64k-debug-modules6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-64k-debug-modules-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-64k-debug-modules-extra6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-64k-devel6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-64k-devel-matched6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-64k-modules6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-64k-modules-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-64k-modules-extra6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-abi-stablelists6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-cross-headers6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-debug6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-debug-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-debug-devel6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-debug-devel-matched6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-debug-modules6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-debug-modules-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-debug-modules-extra6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-debug-uki-virt6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-devel6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-devel-matched6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-doc6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-headers6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-modules6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-modules-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-modules-extra6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-modules-extra-matched6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-64k6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-64k-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-64k-debug6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-64k-debug-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-64k-debug-devel6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-64k-debug-modules6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-64k-debug-modules-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-64k-debug-modules-extra6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-64k-devel6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-64k-modules6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-64k-modules-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-64k-modules-extra6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-debug6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-debug-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-debug-devel6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-debug-modules6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-debug-modules-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-debug-modules-extra6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-devel6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-modules6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-modules-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-rt-modules-extra6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-tools6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-tools-libs6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-tools-libs-devel6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-uki-virt6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-uki-virt-addons6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-zfcpdump6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-zfcpdump-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-zfcpdump-devel6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-zfcpdump-devel-matched6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-zfcpdump-modules6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-zfcpdump-modules-core6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10kernel-zfcpdump-modules-extra6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10libperf6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10perf6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10python3-perf6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10rtla6.12.0-211.53.1.el10_2ALSA-2026:65334
AlmaLinux:10rv6.12.0-211.53.1.el10_2ALSA-2026:65334
Debian:14linux7.0.12-1DEBIAN-CVE-2026-64042
Rocky Linux:10kernel0:6.12.0-211.53.1.el10_2RLSA-2026:65334
Ubuntu:26.04:LTSlinux7.0.0-28.28UBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-64042
Ubuntu:26.04:LTSlinux-aws7.0.0-1009.9UBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-64042
Ubuntu:26.04:LTSlinux-azure7.0.0-1010.10UBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-64042
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1009.9UBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-64042
Ubuntu:26.04:LTSlinux-gcp7.0.0-1008.8UBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-64042
Ubuntu:26.04:LTSlinux-gke7.0.0-1003.4UBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-28.28~24.04.1UBUNTU-CVE-2026-64042
Ubuntu:26.04:LTSlinux-ibm7.0.0-1010.10UBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-64042
Ubuntu:26.04:LTSlinux-nvidia7.0.0-1016.16UBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-64042
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2016.16UBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-64042
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1009.9UBUNTU-CVE-2026-64042
Ubuntu:26.04:LTSlinux-oracle7.0.0-1008.8UBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1011.11~24.04.1UBUNTU-CVE-2026-64042
Ubuntu:26.04:LTSlinux-raspi7.0.0-1015.15UBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-64042
Ubuntu:26.04:LTSlinux-realtime7.0.0-28.28.1UBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-64042
Ubuntu:26.04:LTSlinux-riscv7.0.0-28.28.1UBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-64042
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-28.28.1~24.04.3UBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-64042
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-64042

Affected products (as reported)

VendorProductVersions
Linux Linux 5d74781ebc86c5fa9e9d6934024c505412de9b52 – before 8443cd4497a4498c4b01058d76a92116244cb6055d74781ebc86c5fa9e9d6934024c505412de9b52 – before 702809dabdecca807bdd50cfdcc1c980feb2ba62
Linux Linux 6.19

References