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CVE-2024-50112

x86/lam: Disable ADDRESS_MASKING in most cases

HIGH
7.8
CVSS Score
Published: November 5, 2024 at 05:10 PM UTC
Updated: June 17, 2026 at 08:03 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

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 ]

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
v < 6.6.596.4 ≤ v < 6.11.66.4 ≤ v < 6.126.4 ≤ v < 6.6.596.7 ≤ v < 6.11.66.12 rc16.12 rc26.12 rc36.12 rc46449dcb0cac738219d13c618af7fd8664735f99d
Vendor states this is fixed in 3267cb6d3a174ff83d6287dcd5b0047bbd912452 (fixed)
Vendor states this is fixed in 60a5ba560f296ad8da153f6ad3f70030bfa3958f (fixed)
Vendor states this is fixed in 690599066488d16db96ac0d6340f9372fc56f337 (fixed)
Vendor states this is fixed in 6.11.6 (unaffected)
Vendor states this is fixed in 6.12 (unaffected)
Vendor states this is fixed in 6.4 (unaffected)
Vendor states this is fixed in 6.6.59 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/3267cb6d3a174ff83d6287dcd5b0047bbd912452
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/60a5ba560f296ad8da153f6ad3f70030bfa3958f
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/690599066488d16db96ac0d6340f9372fc56f337

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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