CVE-2023-53598

Kernel panic via unchecked MHI register offsets

Published Oct 4, 2025 · Updated Oct 4, 2025

Out-of-bounds MMIO access in the MHI host driver in Linux allows attackers controlling an attached MHI device to cause a kernel panic. mhi_init_mmio reads CHDBOFF and ERDBOFF without checking that each device-supplied offset remains inside the MHI register space, then computes invalid doorbell addresses. The flaw is reached during device initialization or reset recovery and can crash the host; exploitation requires a malicious or firmware-compromised MHI device.

CVSS severity8.4
High
EPSS probability0.16%
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 MMIO access in the MHI host driver in Linux allows attackers controlling an attached MHI device to cause a kernel panic. mhi_init_mmio reads CHDBOFF and ERDBOFF without checking that each device-supplied offset remains inside the MHI register space, then computes invalid doorbell addresses. The flaw is reached during device initialization or reset recovery and can crash the host; exploitation requires a malicious or firmware-compromised MHI device.

The record

CVE
CVE-2023-53598
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 2025Record 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=5.7
  2. Affected versionversion=6cd330ae76ffd5c8f6294c423cabde7eeef1b40c <2343385fe6eed11d0432ab42a97b3ca4aef06a99
  3. Affected versionversion=6cd330ae76ffd5c8f6294c423cabde7eeef1b40c <372f1752b74572b0a9d2288841eab7db17daccae
  4. Affected versionversion=6cd330ae76ffd5c8f6294c423cabde7eeef1b40c <4e584127ec2bd42a37c88badb49df409f21fa40a
  5. Affected versionversion=6cd330ae76ffd5c8f6294c423cabde7eeef1b40c <6a0c637bfee69a74c104468544d9f2a6579626d0
  6. Affected versionversion=6cd330ae76ffd5c8f6294c423cabde7eeef1b40c <83bf6b87e2dd053d95d89eb2f01ae885f9e568db
  7. Affected versionversion=6cd330ae76ffd5c8f6294c423cabde7eeef1b40c <a2cbb1a45a0c86ce77839c0875414efe1a89315e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.7; version=6cd330ae76ffd5c8f6294c423cabde7eeef1b40c <2343385fe6eed11d0432ab42a97b3ca4aef06a99; version=6cd330ae76ffd5c8f6294c423cabde7eeef1b40c <372f1752b74572b0a9d2288841eab7db17daccae; version=6cd330ae76ffd5c8f6294c423cabde7eeef1b40c <4e584127ec2bd42a37c88badb49df409f21fa40a; version=6cd330ae76ffd5c8f6294c423cabde7eeef1b40c <6a0c637bfee69a74c104468544d9f2a6579626d0; version=6cd330ae76ffd5c8f6294c423cabde7eeef1b40c <83bf6b87e2dd053d95d89eb2f01ae885f9e568db; version=6cd330ae76ffd5c8f6294c423cabde7eeef1b40c <a2cbb1a45a0c86ce77839c0875414efe1a89315e

Published CVSS scores

8.4kernel.orgCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.5NIST NVDCVSS: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 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

T1499.004Application or System Exploitation

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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