In the Linux kernel, the following vulnerability has been resolved:
vfio/type1: prevent underflow of locked_vm via exec()
When a vfio container is preserved across exec, the task does not change, but it gets a new mm with locked_vm=0, and loses the count from existing dma mappings. If the user later unmaps a dma mapping, locked_vm underflows to a large unsigned value, and a subsequent dma map request fails with ENOMEM in __account_locked_vm.
To avoid underflow, grab and save the mm at the time a dma is mapped. Use that mm when adjusting locked_vm, rather than re-acquiring the saved task's mm, which may have changed. If the saved mm is dead, do nothing.
locked_vm is incremented for existing mappings in a subsequent patch.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-headersUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfoUpgrade kernelUpgrade python-perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-tools-develUpgrade kernel-develUpgrade kernel-livepatch-5.10.173-154.642Upgrade kernel-toolsUpgrade bpftoolUpgrade bpftool-debuginfoUpgrade perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-5.15.102-61.139Upgrade python-perfUpgrade perf | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Sep 17, 2025 | Sep 17, 2025 |
| Huawei Euleros 2_0_sp11 | — | Upgrade kernelUpgrade python3-perfUpgrade kernel-tools-libsUpgrade bpftoolUpgrade kernel-abi-stablelistsUpgrade kernel-tools | Dec 12, 2025 | Dec 11, 2025 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade kernelUpgrade python3-perfUpgrade kernel-toolsUpgrade bpftool | Mar 17, 2026 | Mar 16, 2026 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade python3-perfUpgrade bpftoolUpgrade kernel-tools-libs | Dec 12, 2025 | Dec 11, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Sep 15, 2025 |
| Ubuntu | — | Upgrade linux-awsUpgrade linux-intel-iot-realtimeUpgrade linux-nvidia-tegraUpgrade linux-gkeopUpgrade linux-ibmUpgrade linux-gcpUpgrade linux-nvidia-tegra-5.15Upgrade linuxUpgrade linux-azure-5.15Upgrade linux-oracle-5.15Upgrade linux-lowlatencyUpgrade linux-lowlatency-hwe-5.15Upgrade linux-azureUpgrade linux-raspiUpgrade linux-nvidiaUpgrade linux-bluefieldUpgrade linux-hwe-5.15Upgrade linux-oracleUpgrade linux-aws-5.15Upgrade linux-intel-iotgUpgrade linux-kvmUpgrade linux-gkeUpgrade linux-gcp-5.15Upgrade linux-riscv-5.15Upgrade linux-realtimeUpgrade linux-intel-iotg-5.15 | Sep 19, 2025 | Sep 16, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Sep 15, 2025 |
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