CVE-2026-68133

Kernel crash via invalid PTP state transition

Published Aug 10, 2026 · Updated Aug 10, 2026

Reachable assertion in the Linux ice driver 6.9 allows local users to crash the kernel by resetting a PF before driver unload. ice_ptp_rebuild() converts ICE_PTP_UNINIT to ICE_PTP_ERROR after a PF reset, causing ice_ptp_release() to process an invalid list state. The observed path requires a passed-through secondary PF whose PTP initialization lacks ctrl_pf; unloading the driver then triggers the kernel BUG.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reachable assertion in the Linux ice driver 6.9 allows local users to crash the kernel by resetting a PF before driver unload. ice_ptp_rebuild() converts ICE_PTP_UNINIT to ICE_PTP_ERROR after a PF reset, causing ice_ptp_release() to process an invalid list state. The observed path requires a passed-through secondary PF whose PTP initialization lacks ctrl_pf; unloading the driver then triggers the kernel BUG.

The record

CVE
CVE-2026-68133
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-665, CWE-617, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=8293e4cb2ff54b1ec4f7206dcb74c908f62a3fb8 <14fceda28069fdbe1bb49cdb6e1774892b583348
  3. Affected versionversion=8293e4cb2ff54b1ec4f7206dcb74c908f62a3fb8 <7d517b255f669cedd09830214d55f2f413b34481
  4. Affected versionversion=8293e4cb2ff54b1ec4f7206dcb74c908f62a3fb8 <e4406cbdd915f702d2ed9ee8b30683a16b06c6ac
  5. Affected versionversion=8293e4cb2ff54b1ec4f7206dcb74c908f62a3fb8 <f6a7e00b81e35ef1325234925f2fe1e53b466f92

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.9; version=8293e4cb2ff54b1ec4f7206dcb74c908f62a3fb8 <14fceda28069fdbe1bb49cdb6e1774892b583348; version=8293e4cb2ff54b1ec4f7206dcb74c908f62a3fb8 <7d517b255f669cedd09830214d55f2f413b34481; version=8293e4cb2ff54b1ec4f7206dcb74c908f62a3fb8 <e4406cbdd915f702d2ed9ee8b30683a16b06c6ac; version=8293e4cb2ff54b1ec4f7206dcb74c908f62a3fb8 <f6a7e00b81e35ef1325234925f2fe1e53b466f92

Published CVSS scores

5.6SUSECVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
4.1SUSECVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
4.1Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
5.5Red HatCVSS: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.

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-665Improper Initialization
CWE-617Reachable Assertion
T1499Endpoint Denial of Service

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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