CVE-2026-80950

Kernel crash via timed-out I3C transfer

Published Sep 11, 2026 · Updated Sep 11, 2026

Use-after-free in the Renesas I3C driver in Linux 6.17 allows attackers to crash the kernel via a timed-out transfer. After a timeout, the waiting thread dequeues and frees renesas_i3c_xfer while a later interrupt handler still accesses that transfer. Triggering the crash requires applicable Renesas I3C hardware and an interrupt arriving after timeout cleanup.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Renesas I3C driver in Linux 6.17 allows attackers to crash the kernel via a timed-out transfer. After a timeout, the waiting thread dequeues and frees renesas_i3c_xfer while a later interrupt handler still accesses that transfer. Triggering the crash requires applicable Renesas I3C hardware and an interrupt arriving after timeout cleanup.

The record

CVE
CVE-2026-80950
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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=6.17
  2. Affected versionversion=d028219a9f1485914492bf373406f6a0e665ace2 <0093f9fc102ba8b98561fdd2f8559553ef56be59
  3. Affected versionversion=d028219a9f1485914492bf373406f6a0e665ace2 <5f1a76ecfe90544a28d657306c9b3caa66ba0e63
  4. Affected versionversion=d028219a9f1485914492bf373406f6a0e665ace2 <ec631aff93261c6d031f953549802322032f2aba

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=6.17; version=d028219a9f1485914492bf373406f6a0e665ace2 <0093f9fc102ba8b98561fdd2f8559553ef56be59; version=d028219a9f1485914492bf373406f6a0e665ace2 <5f1a76ecfe90544a28d657306c9b3caa66ba0e63; version=d028219a9f1485914492bf373406f6a0e665ace2 <ec631aff93261c6d031f953549802322032f2aba

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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