CVE-2025-37846

Kernel memory disclosure via SET source dereference

Published May 9, 2025 · Updated May 11, 2026

Out-of-bounds read in affected Linux arm64 kernels allows local users to disclose kernel memory or interrupt the system through MOPS SET. The do_el0_mops() handler dereferences the encoded source-register field even though SET operations do not use a source, indexing past the register array when ESR reports XZR as register 31. Triggering requires local execution on an arm64 system implementing MOPS and a SET sequence that takes an exception with XZR encoded as its source.

CVSS severity7.1
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in affected Linux arm64 kernels allows local users to disclose kernel memory or interrupt the system through MOPS SET. The do_el0_mops() handler dereferences the encoded source-register field even though SET operations do not use a source, indexing past the register array when ESR reports XZR as register 31. Triggering requires local execution on an arm64 system implementing MOPS and a SET sequence that takes an exception with XZR encoded as its source.

The record

CVE
CVE-2025-37846
Published
May 9, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 9, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2de451a329cf662beeba71f63c7f83ee24ca6642 <43267d934eacff6c70e15545d804ebbcab8a0bf5
  2. Affected versionversion=2de451a329cf662beeba71f63c7f83ee24ca6642 <5f6022a74147675124b781fdc056b291850e7786
  3. Affected versionversion=2de451a329cf662beeba71f63c7f83ee24ca6642 <a13bfa4fe0d6949cea14718df2d1fe84c38cd113
  4. Affected versionversion=2de451a329cf662beeba71f63c7f83ee24ca6642 <eec737e17e5567e08148550a7f1d94d495b9fb17
  5. Affected versionversion=6.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2de451a329cf662beeba71f63c7f83ee24ca6642 <43267d934eacff6c70e15545d804ebbcab8a0bf5; version=2de451a329cf662beeba71f63c7f83ee24ca6642 <5f6022a74147675124b781fdc056b291850e7786; version=2de451a329cf662beeba71f63c7f83ee24ca6642 <a13bfa4fe0d6949cea14718df2d1fe84c38cd113; version=2de451a329cf662beeba71f63c7f83ee24ca6642 <eec737e17e5567e08148550a7f1d94d495b9fb17; version=6.7

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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