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In the Linux kernel, the following vulnerability has been resolved:
mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths
Any codepath that zaps page table entries must invoke MMU notifiers to ensure that secondary MMUs (like KVM) don't keep accessing pages which aren't mapped anymore. Secondary MMUs don't hold their own references to pages that are mirrored over, so failing to notify them can lead to page use-after-free.
I'm marking this as addressing an issue introduced in commit f3f0e1d2150b ("khugepaged: add support of collapse for tmpfs/shmem pages"), but most of the security impact of this only came in commit 27e1f8273113 ("khugepaged: enable collapse pmd for pte-mapped THP"), which actually omitted flushes for the removal of present PTEs, not just for the removal of empty page tables.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-livepatch-5.15.86-53.137Upgrade kernel-livepatch-4.14.304-226.531Upgrade kernel-livepatch-5.10.162-141.675Upgrade bpftool-debuginfoUpgrade bpftoolUpgrade kernel-debuginfo-common-aarch64Upgrade python-perfUpgrade perfUpgrade kernel-toolsUpgrade perf-debuginfoUpgrade kernel-develUpgrade kernelUpgrade kernel-headersUpgrade kernel-tools-develUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade python-perf-debuginfo | Jan 22, 2025 | Oct 21, 2024 |
| Amazon_linux | — | Upgrade kernel | Jan 23, 2025 | Mar 20, 2023 |
| Debian | — | Upgrade linux | Oct 23, 2024 | Oct 23, 2024 |
| Dell Powerstore Dsa2025223 | — | Upgrade Dell PowerStoreOS to the latest version | Oct 23, 2025 | May 27, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Oct 21, 2024 |
| Ubuntu | — | Upgrade linux-aws-hweUpgrade linux-oracle-5.4Upgrade linux-ibm-5.4Upgrade linux-bluefieldUpgrade linux-lowlatencyUpgrade linuxUpgrade linux-awsUpgrade linux-aws-5.4Upgrade linux-riscv-5.15Upgrade linux-raspi-5.4Upgrade linux-nvidia-tegra-5.15Upgrade linux-realtimeUpgrade linux-azure-fdeUpgrade linux-raspiUpgrade linux-aws-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-fipsUpgrade linux-gkeUpgrade linux-gkeopUpgrade linux-gcp-5.15Upgrade linux-xilinx-zynqmpUpgrade linux-hwe-5.15Upgrade linux-intel-iot-realtimeUpgrade linux-azure-fipsUpgrade linux-hweUpgrade linux-iotUpgrade linux-azureUpgrade linux-oracleUpgrade linux-azure-5.4Upgrade linux-gcp-4.15Upgrade linux-gcpUpgrade linux-gcp-fipsUpgrade linux-aws-fipsUpgrade linux-ibmUpgrade linux-gkeop-5.15Upgrade linux-hwe-5.4Upgrade linux-nvidiaUpgrade linux-kvmUpgrade linux-azure-5.15Upgrade linux-azure-4.15Upgrade linux-intel-iotgUpgrade linux-intel-iotg-5.15Upgrade linux-gcp-5.4Upgrade linux-oracle-5.15 | Nov 19, 2024 | Oct 21, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Oct 21, 2024 |
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