CVE-2026-72146

Kernel crash via premature rz-dmac interrupt request

Published Aug 15, 2026 · Updated Aug 15, 2026

Race condition in the rz-dmac DMA driver in Linux allows attackers to crash the kernel via an early interrupt during initialization. The probe path requests interrupts before initializing channel->ch_base and the ld_free, ld_queue, and ld_active lists, so an immediate handler accesses uninitialized state. Exploitation requires an affected Renesas DMA configuration and favorable interrupt timing; the documented consequence is invalid memory access and system instability.

CVSS severity8.4
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the rz-dmac DMA driver in Linux allows attackers to crash the kernel via an early interrupt during initialization. The probe path requests interrupts before initializing channel->ch_base and the ld_free, ld_queue, and ld_active lists, so an immediate handler accesses uninitialized state. Exploitation requires an affected Renesas DMA configuration and favorable interrupt timing; the documented consequence is invalid memory access and system instability.

The record

CVE
CVE-2026-72146
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-824
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=5000d37042a61ca556fde2782ca40dbfa802ea16 <07ae600bd353b22f31a8f1007269744fafc7f123
  2. Affected versionversion=5000d37042a61ca556fde2782ca40dbfa802ea16 <2a4d9e2234c3f817bb0ddbc8680d09ce9be84f93
  3. Affected versionversion=5000d37042a61ca556fde2782ca40dbfa802ea16 <5b12de6229d662864ee22c11d4876652b40120f0
  4. Affected versionversion=5000d37042a61ca556fde2782ca40dbfa802ea16 <731712403ddb39d1a76a11abf339a0615bc85de7
  5. Affected versionversion=5000d37042a61ca556fde2782ca40dbfa802ea16 <ec9f66c91bffdb69d309bae6dfb387562db7ebc8
  6. Affected versionversion=5.15

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5000d37042a61ca556fde2782ca40dbfa802ea16 <07ae600bd353b22f31a8f1007269744fafc7f123; version=5000d37042a61ca556fde2782ca40dbfa802ea16 <2a4d9e2234c3f817bb0ddbc8680d09ce9be84f93; version=5000d37042a61ca556fde2782ca40dbfa802ea16 <5b12de6229d662864ee22c11d4876652b40120f0; version=5000d37042a61ca556fde2782ca40dbfa802ea16 <731712403ddb39d1a76a11abf339a0615bc85de7; version=5000d37042a61ca556fde2782ca40dbfa802ea16 <ec9f66c91bffdb69d309bae6dfb387562db7ebc8; version=5.15

Published CVSS scores

4.7SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
8.4Linux Kernel CNACVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-824Access of Uninitialized Pointer

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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