CVE-2026-68345

Kernel crash via NULL MBWU state teardown

Published Aug 10, 2026 · Updated Aug 10, 2026

NULL pointer dereference in Linux kernel 6.19 through 7.1.5 and 7.2 release candidates before 7.2-rc5 allows local users to crash the kernel. The __destroy_component_cfg() path passes a NULL ris->mbwu_state for RIS entries without MBWU monitors to add_to_garbage(), which dereferences it. Triggering the fault requires local administrative access and ARM hardware exposing MPAM with a component whose RIS set mixes MBWU-capable and non-MBWU resources.

CVSS severity4.1
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux kernel 6.19 through 7.1.5 and 7.2 release candidates before 7.2-rc5 allows local users to crash the kernel. The __destroy_component_cfg() path passes a NULL ris->mbwu_state for RIS entries without MBWU monitors to add_to_garbage(), which dereferences it. Triggering the fault requires local administrative access and ARM hardware exposing MPAM with a component whose RIS set mixes MBWU-capable and non-MBWU resources.

The record

CVE
CVE-2026-68345
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=41e8a14950e1732af51cfec8fa09f8ded02a5ca9 <977f52909c624210178a1247fab0b02b110c1106
  2. Affected versionversion=41e8a14950e1732af51cfec8fa09f8ded02a5ca9 <ca1f96334267ab8d47b2c9d535cdc9920fdde269
  3. Affected versionversion=6.19

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=41e8a14950e1732af51cfec8fa09f8ded02a5ca9 <977f52909c624210178a1247fab0b02b110c1106; version=41e8a14950e1732af51cfec8fa09f8ded02a5ca9 <ca1f96334267ab8d47b2c9d535cdc9920fdde269; version=6.19

Published CVSS scores

4.1Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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