In the Linux kernel, the following vulnerability has been resolved:
x86/lam: Disable ADDRESS_MASKING in most cases
Linear Address Masking (LAM) has a weakness related to transient execution as described in the SLAM paper[1]. Unless Linear Address Space Separation (LASS) is enabled this weakness may be exploitable.
Until kernel adds support for LASS[2], only allow LAM for COMPILE_TEST, or when speculation mitigations have been disabled at compile time, otherwise keep LAM disabled.
There are no processors in market that support LAM yet, so currently nobody is affected by this issue.
[1] SLAM: https://download.vusec.net/papers/slam_sp24.pdf [2] LASS: https://lore.kernel.org/lkml/[email protected]/
[ dhansen: update SPECULATION_MITIGATIONS -> CPU_MITIGATIONS ]
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | May 15, 2025 | Nov 5, 2024 |
| Ubuntu | — | Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-virtualUpgrade linux-image-6.8.0-1023-gkeUpgrade linux-image-6.11.0-18-generic-64kUpgrade linux-image-oracle-64kUpgrade linux-image-6.11.0-1010-lowlatency-64kUpgrade linux-image-6.11.0-1010-lowlatencyUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-genericUpgrade linux-image-gkeUpgrade linux-image-nvidia-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-lowlatencyUpgrade linux-image-gkeop-6.8Upgrade linux-image-realtime-hwe-24.04Upgrade linux-image-6.8.0-1026-nvidia-lowlatency-64kUpgrade linux-image-oem-22.04cUpgrade linux-image-6.8.0-58-lowlatencyUpgrade linux-image-6.11.0-1011-oracleUpgrade linux-image-6.11.0-1009-gcpUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-realtimeUpgrade linux-image-6.11.0-1015-oemUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-nvidiaUpgrade linux-image-6.11.0-18-genericUpgrade linux-image-6.8.0-1024-oracleUpgrade linux-image-6.8.0-1027-azureUpgrade linux-image-6.8.0-1026-nvidiaUpgrade linux-image-oem-24.04aUpgrade linux-image-oem-24.04Upgrade linux-image-gkeopUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-6.8.0-1027-azure-fdeUpgrade linux-image-6.11.0-1009-azure-fdeUpgrade linux-image-gcpUpgrade linux-image-6.8.0-58-lowlatency-64kUpgrade linux-image-6.11.0-1005-realtimeUpgrade linux-image-generic-64kUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-1028-gcp-64kUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-raspi-realtimeUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-aws-lts-24.04Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-oem-22.04bUpgrade linux-image-6.8.0-1027-awsUpgrade linux-image-6.8.0-1026-oemUpgrade linux-image-6.8.0-1026-nvidia-64kUpgrade linux-image-6.8.1-1020-realtimeUpgrade linux-image-6.11.0-1011-oracle-64kUpgrade linux-image-6.8.0-1026-nvidia-lowlatencyUpgrade linux-image-6.11.0-1009-azureUpgrade linux-image-azure-lts-24.04Upgrade linux-image-oem-22.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-oem-22.04dUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-58-generic-64kUpgrade linux-image-azure-fdeUpgrade linux-image-oem-22.04aUpgrade linux-image-6.8.0-1010-gkeopUpgrade linux-image-6.8.0-2023-raspi-realtimeUpgrade linux-image-azure-nvidiaUpgrade linux-image-oracleUpgrade linux-image-oem-24.04bUpgrade linux-image-raspiUpgrade linux-image-6.11.0-1009-awsUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-gcp-64kUpgrade linux-image-6.8.0-1024-ibmUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-nvidia-6.8Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-ibm-classicUpgrade linux-image-generic-lpaeUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-kvmUpgrade linux-image-azureUpgrade linux-image-6.8.0-1024-oracle-64kUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-6.8.0-1028-raspiUpgrade linux-image-ibmUpgrade linux-image-awsUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-58-genericUpgrade linux-image-6.8.0-1014-azure-nvidiaUpgrade linux-image-6.11.0-1008-raspiUpgrade linux-image-6.8.0-1028-gcp | Feb 20, 2025 | Nov 5, 2024 |
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