CVE-2026-53339

Kernel crash via uninitialized CCI completion

Published Jul 1, 2026 · Updated Jul 1, 2026

NULL pointer dereference in the Qualcomm CCI I2C driver in affected Linux Kernel releases allows local users to crash the kernel. During cci_remove(), the driver calls cci_halt() for both controller masters even when only one master's completion object was initialized. The condition requires a Qualcomm CCI board with only one master initialized and local access capable of unbinding the device or removing the module; the resulting kernel oops interrupts the system.

CVSS severity5.5
Medium
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

NULL pointer dereference in the Qualcomm CCI I2C driver in affected Linux Kernel releases allows local users to crash the kernel. During cci_remove(), the driver calls cci_halt() for both controller masters even when only one master's completion object was initialized. The condition requires a Qualcomm CCI board with only one master initialized and local access capable of unbinding the device or removing the module; the resulting kernel oops interrupts the system.

The record

CVE
CVE-2026-53339
Published
Jul 1, 2026
Updated
Jul 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 1, 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=5.8
  2. Affected versionversion=e517526195de400158e05a08764d1fb61d579105 <4cd206c1d57a9370d5219f7b1fc45169d7bdf951
  3. Affected versionversion=e517526195de400158e05a08764d1fb61d579105 <4d2b4a9cda6837e5ee1de1290f2e773a713b71e9
  4. Affected versionversion=e517526195de400158e05a08764d1fb61d579105 <7107627b8b35015027201e7a095a3f6e30b4a46f
  5. Affected versionversion=e517526195de400158e05a08764d1fb61d579105 <729ac5a4b966aac42e08a94dea966f4429008548
  6. Affected versionversion=e517526195de400158e05a08764d1fb61d579105 <8ce7ff721a5e9d06d53ef65d01c89fce6d26d6ff
  7. Affected versionversion=e517526195de400158e05a08764d1fb61d579105 <a162a260c8c4db7501c65220e76913e8e351f823
  8. Affected versionversion=e517526195de400158e05a08764d1fb61d579105 <a50b8adb9cdb9a495b0b45583956897b7411ed7a
  9. Affected versionversion=e517526195de400158e05a08764d1fb61d579105 <e8669d12da0ade52adfe0abe96cd99e708abc9bd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.8; version=e517526195de400158e05a08764d1fb61d579105 <4cd206c1d57a9370d5219f7b1fc45169d7bdf951; version=e517526195de400158e05a08764d1fb61d579105 <4d2b4a9cda6837e5ee1de1290f2e773a713b71e9; version=e517526195de400158e05a08764d1fb61d579105 <7107627b8b35015027201e7a095a3f6e30b4a46f; version=e517526195de400158e05a08764d1fb61d579105 <729ac5a4b966aac42e08a94dea966f4429008548; version=e517526195de400158e05a08764d1fb61d579105 <8ce7ff721a5e9d06d53ef65d01c89fce6d26d6ff; version=e517526195de400158e05a08764d1fb61d579105 <a162a260c8c4db7501c65220e76913e8e351f823; version=e517526195de400158e05a08764d1fb61d579105 <a50b8adb9cdb9a495b0b45583956897b7411ed7a; version=e517526195de400158e05a08764d1fb61d579105 <e8669d12da0ade52adfe0abe96cd99e708abc9bd

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
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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