CVE-2026-23210

Kernel crash via PTP rebuild race

Published Feb 14, 2026 · Updated Feb 14, 2026

NULL pointer dereference in Linux Kernel 6.9 through 6.18.9 allows local users to crash the kernel during an ICE virtual station interface rebuild. The ice_ptp_rebuild function requeues periodic PTP work before ice_rebuild restores vsi->rx_rings, so ice_ptp_update_cached_phctime dereferences a NULL ring pointer. Reachability requires ICE hardware with PTP ready and a reset-driven VSI rebuild; affected 6.19-rc1 through 6.19-rc8 builds also crash without data disclosure or modification.

CVSS severity4.7
Medium
EPSS probability0.11%
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 Kernel 6.9 through 6.18.9 allows local users to crash the kernel during an ICE virtual station interface rebuild. The ice_ptp_rebuild function requeues periodic PTP work before ice_rebuild restores vsi->rx_rings, so ice_ptp_update_cached_phctime dereferences a NULL ring pointer. Reachability requires ICE hardware with PTP ready and a reset-driven VSI rebuild; affected 6.19-rc1 through 6.19-rc8 builds also crash without data disclosure or modification.

The record

CVE
CVE-2026-23210
Published
Feb 14, 2026
Updated
Feb 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 14, 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=6.9
  2. Affected versionversion=803bef817807d2d36c930dada20c96fffae0dd19 <7565d4df66b6619b50dc36618d8b8f1787d77e19
  3. Affected versionversion=803bef817807d2d36c930dada20c96fffae0dd19 <fc6f36eaaedcf4b81af6fe1a568f018ffd530660

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.9; version=803bef817807d2d36c930dada20c96fffae0dd19 <7565d4df66b6619b50dc36618d8b8f1787d77e19; version=803bef817807d2d36c930dada20c96fffae0dd19 <fc6f36eaaedcf4b81af6fe1a568f018ffd530660

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
7.0Oracle LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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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