CVE-2024-35891

Kernel crash via unchecked PTP header pointer

Published May 19, 2024 · Updated Aug 5, 2026

NULL pointer dereference in the Linux kernel Micrel PHY driver allows local users to crash the system via malformed PTP packets. The lan8814_get_sig_rx() and lan8814_get_sig_tx() functions dereference the result of ptp_parse_header() without checking whether abnormal or corrupted input caused it to return NULL. Reachability requires LAN8814 PTP timestamp processing, and the reported consequence is loss of system availability.

CVSS severity5.5
Medium
EPSS probability0.61%
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 Micrel PHY driver allows local users to crash the system via malformed PTP packets. The lan8814_get_sig_rx() and lan8814_get_sig_tx() functions dereference the result of ptp_parse_header() without checking whether abnormal or corrupted input caused it to return NULL. Reachability requires LAN8814 PTP timestamp processing, and the reported consequence is loss of system availability.

The record

CVE
CVE-2024-35891
Published
May 19, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=5.18
  2. Affected versionversion=ece19502834d84ece2e056db28257ca2aa6e4d48 <10608161696c2768f53426642f78a42bcaaa53e8
  3. Affected versionversion=ece19502834d84ece2e056db28257ca2aa6e4d48 <49767b0df276f12e3e7184601e09ee7430e252dc
  4. Affected versionversion=ece19502834d84ece2e056db28257ca2aa6e4d48 <95c1016a2d92c4c28a9d1b6d09859c00b19c0ea4
  5. Affected versionversion=ece19502834d84ece2e056db28257ca2aa6e4d48 <96c155943a703f0655c0c4cab540f67055960e91

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.18; version=ece19502834d84ece2e056db28257ca2aa6e4d48 <10608161696c2768f53426642f78a42bcaaa53e8; version=ece19502834d84ece2e056db28257ca2aa6e4d48 <49767b0df276f12e3e7184601e09ee7430e252dc; version=ece19502834d84ece2e056db28257ca2aa6e4d48 <95c1016a2d92c4c28a9d1b6d09859c00b19c0ea4; version=ece19502834d84ece2e056db28257ca2aa6e4d48 <96c155943a703f0655c0c4cab540f67055960e91

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
T1499.004Endpoint Denial of Service: Application 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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