CVE-2023-53470

Kernel panic via unchecked devlink allocation failure

Published Oct 1, 2025 · Updated Oct 1, 2025

NULL pointer dereference in the Linux ionic Ethernet driver from version 5.4 allows local users to panic the kernel during driver load. ionic_devlink_register does not test devlink_alloc's return before passing it to devlink_priv, so allocation failure dereferences NULL. Reachability requires the ionic driver and a failed devlink allocation; the resulting kernel panic interrupts the host.

CVSS severity5.5
Medium
EPSS probability0.15%
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 the Linux ionic Ethernet driver from version 5.4 allows local users to panic the kernel during driver load. ionic_devlink_register does not test devlink_alloc's return before passing it to devlink_priv, so allocation failure dereferences NULL. Reachability requires the ionic driver and a failed devlink allocation; the resulting kernel panic interrupts the host.

The record

CVE
CVE-2023-53470
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 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=5.4
  2. Affected versionversion=df69ba43217d3cf4215c83c0627ce98a26e56e7c <0020c16c8af7f4bc9503a2088fb30793b6771fac
  3. Affected versionversion=df69ba43217d3cf4215c83c0627ce98a26e56e7c <0d02efe7f25158c93146e3bb827bc7bb3cd5e71a
  4. Affected versionversion=df69ba43217d3cf4215c83c0627ce98a26e56e7c <4a54903ff68ddb33b6463c94b4eb37fc584ef760
  5. Affected versionversion=df69ba43217d3cf4215c83c0627ce98a26e56e7c <5325f50de5b1433b27dda7ccff5cb7283722a3f1
  6. Affected versionversion=df69ba43217d3cf4215c83c0627ce98a26e56e7c <c177dd465f5c1e5f242cdb9258826c591c257e9a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.4; version=df69ba43217d3cf4215c83c0627ce98a26e56e7c <0020c16c8af7f4bc9503a2088fb30793b6771fac; version=df69ba43217d3cf4215c83c0627ce98a26e56e7c <0d02efe7f25158c93146e3bb827bc7bb3cd5e71a; version=df69ba43217d3cf4215c83c0627ce98a26e56e7c <4a54903ff68ddb33b6463c94b4eb37fc584ef760; version=df69ba43217d3cf4215c83c0627ce98a26e56e7c <5325f50de5b1433b27dda7ccff5cb7283722a3f1; version=df69ba43217d3cf4215c83c0627ce98a26e56e7c <c177dd465f5c1e5f242cdb9258826c591c257e9a

Published CVSS scores

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 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-476NULL Pointer Dereference
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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