CVE-2023-54319

Kernel fault via unchecked allocation failure

Published Dec 30, 2025 · Updated Dec 30, 2025

NULL-pointer dereference in the Linux kernel AT91 PIO4 driver allows attackers to cause a kernel fault via unspecified vectors. The driver stores a devm_kasprintf() result as a pin name without checking for NULL, then continues initialization with the invalid pointer. Reachability requires the AT91 PIO4 driver on a SAMA5D2-class system and an allocation failure; no attacker-controlled trigger is published.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
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 kernel AT91 PIO4 driver allows attackers to cause a kernel fault via unspecified vectors. The driver stores a devm_kasprintf() result as a pin name without checking for NULL, then continues initialization with the invalid pointer. Reachability requires the AT91 PIO4 driver on a SAMA5D2-class system and an allocation failure; no attacker-controlled trigger is published.

The record

CVE
CVE-2023-54319
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
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=4.4
  2. Affected versionversion=776180848b574c9c01217fa958f10843ffce584f <0a95dd17a73b7603818ad7c46c99d757232be331
  3. Affected versionversion=776180848b574c9c01217fa958f10843ffce584f <0af388fce352ed2ab383fd5d1a08db551ca15c38
  4. Affected versionversion=776180848b574c9c01217fa958f10843ffce584f <3e8ce1d5a1a9d758b359e5c426543957f35991f8
  5. Affected versionversion=776180848b574c9c01217fa958f10843ffce584f <5bfd577cc728270d6cd7af6c652a1e7661f25487
  6. Affected versionversion=776180848b574c9c01217fa958f10843ffce584f <8a1fa202f47f39680a4305af744f499a324f8a03
  7. Affected versionversion=776180848b574c9c01217fa958f10843ffce584f <8d788f2ba830d6d32499b198c526d577c590eedf
  8. Affected versionversion=776180848b574c9c01217fa958f10843ffce584f <aa3932eb07392d626486428e2ffddc660658e22a
  9. Affected versionversion=776180848b574c9c01217fa958f10843ffce584f <f3c7b95c9991dab02e616fc251b6c3516e0bd0ac
  10. Affected versionversion=776180848b574c9c01217fa958f10843ffce584f <f6fd5d4ff8ca0b24cee1af4130bcb1fa96b61aa0

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=4.4; version=776180848b574c9c01217fa958f10843ffce584f <0a95dd17a73b7603818ad7c46c99d757232be331; version=776180848b574c9c01217fa958f10843ffce584f <0af388fce352ed2ab383fd5d1a08db551ca15c38; version=776180848b574c9c01217fa958f10843ffce584f <3e8ce1d5a1a9d758b359e5c426543957f35991f8; version=776180848b574c9c01217fa958f10843ffce584f <5bfd577cc728270d6cd7af6c652a1e7661f25487; version=776180848b574c9c01217fa958f10843ffce584f <8a1fa202f47f39680a4305af744f499a324f8a03; version=776180848b574c9c01217fa958f10843ffce584f <8d788f2ba830d6d32499b198c526d577c590eedf; version=776180848b574c9c01217fa958f10843ffce584f <aa3932eb07392d626486428e2ffddc660658e22a; version=776180848b574c9c01217fa958f10843ffce584f <f3c7b95c9991dab02e616fc251b6c3516e0bd0ac; version=776180848b574c9c01217fa958f10843ffce584f <f6fd5d4ff8ca0b24cee1af4130bcb1fa96b61aa0

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

No sourced classifications are available.

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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