CVE-2023-54249

Service interrupt via unchecked MHI callback

Published Dec 30, 2025 · Updated Dec 30, 2025

NULL pointer dereference in Linux 5.19 through 6.1.15 and 6.2 through 6.2.2 allows attackers to interrupt MHI endpoint channels. The STOP and RESET cases in mhi_ep_process_cmd_ring call mhi_chan->xfer_cb without first verifying that a client driver supplied the callback. A started MHI endpoint channel without an available client driver is required, and the resulting dereference interrupts kernel operation.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
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 5.19 through 6.1.15 and 6.2 through 6.2.2 allows attackers to interrupt MHI endpoint channels. The STOP and RESET cases in mhi_ep_process_cmd_ring call mhi_chan->xfer_cb without first verifying that a client driver supplied the callback. A started MHI endpoint channel without an available client driver is required, and the resulting dereference interrupts kernel operation.

The record

CVE
CVE-2023-54249
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 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=5.19
  2. Affected versionversion=e827569062a804c67b51930ce83a4cb886113cb7 <353aea15d6edbd4e69e039356a1bd3e641f7d952
  3. Affected versionversion=e827569062a804c67b51930ce83a4cb886113cb7 <860ad591056d7e4dc30bc130b6ec6e6d70930c85
  4. Affected versionversion=e827569062a804c67b51930ce83a4cb886113cb7 <e6cebcc27519dcf1652e604c73b9fd4f416987c0

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=e827569062a804c67b51930ce83a4cb886113cb7 <353aea15d6edbd4e69e039356a1bd3e641f7d952; version=e827569062a804c67b51930ce83a4cb886113cb7 <860ad591056d7e4dc30bc130b6ec6e6d70930c85; version=e827569062a804c67b51930ce83a4cb886113cb7 <e6cebcc27519dcf1652e604c73b9fd4f416987c0

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

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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