CVE-2026-64169

Kernel crash via uncleared DMA error pointers

Published Jul 19, 2026 · Updated Jul 19, 2026

Error-pointer dereference in the ep93xx SPI driver in Linux Kernel allows local users to crash the kernel during driver teardown. ep93xx_spi_setup_dma leaves a failed dma_request_chan result in an RX or TX channel field, and cleanup later treats that ERR_PTR value as a valid DMA channel. Reachability requires the ep93xx driver, a failed DMA request, and a later probe error or driver unbind; the bounded consequence is a kernel crash.

CVSS severity5.5
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

Error-pointer dereference in the ep93xx SPI driver in Linux Kernel allows local users to crash the kernel during driver teardown. ep93xx_spi_setup_dma leaves a failed dma_request_chan result in an RX or TX channel field, and cleanup later treats that ERR_PTR value as a valid DMA channel. Reachability requires the ep93xx driver, a failed DMA request, and a later probe error or driver unbind; the bounded consequence is a kernel crash.

The record

CVE
CVE-2026-64169
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 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=6.12
  2. Affected versionversion=e79e7c2df6277ee1ad9364a231f6183da4492415 <0e2189ab095e3657f37b8295f3f2bbcde0f27529
  3. Affected versionversion=e79e7c2df6277ee1ad9364a231f6183da4492415 <5e121a81667a83e9a01d62b429e340f5a4a84abc
  4. Affected versionversion=e79e7c2df6277ee1ad9364a231f6183da4492415 <8e027db9fa310b1d5e7ad928510be800c4f004d9
  5. Affected versionversion=e79e7c2df6277ee1ad9364a231f6183da4492415 <b6c0dabea07e25bd7db19a77ebfd0d02b9e2671a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.12; version=e79e7c2df6277ee1ad9364a231f6183da4492415 <0e2189ab095e3657f37b8295f3f2bbcde0f27529; version=e79e7c2df6277ee1ad9364a231f6183da4492415 <5e121a81667a83e9a01d62b429e340f5a4a84abc; version=e79e7c2df6277ee1ad9364a231f6183da4492415 <8e027db9fa310b1d5e7ad928510be800c4f004d9; version=e79e7c2df6277ee1ad9364a231f6183da4492415 <b6c0dabea07e25bd7db19a77ebfd0d02b9e2671a

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
T1499.004Application or System Exploitation

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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