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.
CVSS Details
- CVSS 3.1 Base Score: 8.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade bpftoolUpgrade kernel-livepatch-5.10.162-141.675Upgrade kernel-livepatch-5.15.86-53.137Upgrade kernel-toolsUpgrade kernel-livepatch-4.14.304-226.531Upgrade perf-debuginfoUpgrade python-perfUpgrade kernel-debuginfo-common-aarch64Upgrade bpftool-debuginfoUpgrade perfUpgrade kernel-develUpgrade kernel-tools-debuginfoUpgrade kernelUpgrade python-perf-debuginfoUpgrade kernel-tools-develUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-headers | 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-hwe-5.4Upgrade linux-azure-4.15Upgrade linux-intel-iotg-5.15Upgrade linux-azureUpgrade linux-azure-5.4Upgrade linux-gcp-fipsUpgrade linux-gcp-4.15Upgrade linux-gcpUpgrade linux-gcp-5.4Upgrade linux-intel-iot-realtimeUpgrade linux-intel-iotgUpgrade linux-gkeop-5.15Upgrade linux-ibmUpgrade linux-azure-5.15Upgrade linux-hweUpgrade linux-gkeopUpgrade linux-kvmUpgrade linux-azure-fipsUpgrade linux-aws-fipsUpgrade linux-nvidiaUpgrade linux-oracleUpgrade linux-xilinx-zynqmpUpgrade linux-iotUpgrade linux-oracle-5.15Upgrade linux-hwe-5.15Upgrade linux-gcp-5.15Upgrade linux-azure-fdeUpgrade linux-realtimeUpgrade linux-raspi-5.4Upgrade linux-riscv-5.15Upgrade linuxUpgrade linux-raspiUpgrade linux-fipsUpgrade linux-lowlatency-hwe-5.15Upgrade linux-aws-5.4Upgrade linux-oracle-5.4Upgrade linux-bluefieldUpgrade linux-aws-hweUpgrade linux-gkeUpgrade linux-ibm-5.4Upgrade linux-lowlatencyUpgrade linux-awsUpgrade linux-aws-5.15Upgrade linux-nvidia-tegra-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 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub