CVE-2026-64170 - Vulnerability Details

- spi: qup: fix error pointer deref after DMA setup failure

Description

In the Linux kernel, the following vulnerability has been resolved:

spi: qup: fix error pointer deref after DMA setup failure

The driver falls back to PIO mode if DMA setup fails during probe.

Make sure to the clear the DMA channel pointers on setup failure to
avoid dereferencing an error pointer (or attempting to release a channel
a second time) on later probe errors or driver unbind.

This issue was flagged by Sashiko when reviewing a devres allocation
conversion patch.

Published: 2026-07-19

Score: 5.5 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

The QUP (Qualcomm QUP) SPI driver in the Linux kernel contains a flaw where a failed DMA setup during driver probe can leave the DMA channel pointers set to an error value. When the driver later dereferences these pointers or attempts to free the DMA channel a second time, an invalid memory reference occurs (CWE‑825). This results in a kernel crash, leading to an immediate loss of system availability.

Affected Systems

The vulnerability exists in all Linux kernel builds that include the QUP driver and have not yet applied the recent patch that clears DMA channel pointers on setup failure. No specific kernel version is listed, so any distribution or kernel version containing the unpatched driver is potentially affected.

Risk and Exploitability

The CVSS score of 5.5 classifies the issue as medium severity. The EPSS score of below 1 % indicates a low probability of exploitation in the wild, and the vulnerability is not listed in the CISA KEV catalog. Exploitation requires local or privileged access during driver probe, so the attack vector is inferred to be local. The overall risk is moderate but with a low likelihood of targeted attacks.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`612762e82ae6058d69b4ce734598491bf030afe7`	affected	< 0bb3bd442f0bdad3932739a61dd6c580c9c1955e
`612762e82ae6058d69b4ce734598491bf030afe7`	affected	< d577c55d189e7ae150973058d13e299b6855633f
`612762e82ae6058d69b4ce734598491bf030afe7`	affected	< 9e673affb92c29d9ba879bf4ea81c5e840166b56
`612762e82ae6058d69b4ce734598491bf030afe7`	affected	< 45760b72e84c1a1498f1a8a9047184c85299da20
`612762e82ae6058d69b4ce734598491bf030afe7`	affected	< 8f9b61d255b1e989b8913b06c8ebe0aba5e1b238
`612762e82ae6058d69b4ce734598491bf030afe7`	affected	< 4bb4764f2c51f03f657a28029eb0595d8223aab5
`612762e82ae6058d69b4ce734598491bf030afe7`	affected	< 4f4051e9d644c371c50de4a042b85bba6727d5c3
`612762e82ae6058d69b4ce734598491bf030afe7`	affected	< a7e8f3efd50a165ba0189f6dc57f7e51a7d149db

Linux

affected

Version	Status	Constraints
`4.1`	affected	—
`0`	unaffected	< 4.1
`5.10.259`	unaffected	≤ 5.10.*
`5.15.210`	unaffected	≤ 5.15.*
`6.1.176`	unaffected	≤ 6.1.*
`6.6.142`	unaffected	≤ 6.6.*
`6.12.92`	unaffected	≤ 6.12.*
`6.18.34`	unaffected	≤ 6.18.*
`7.0.11`	unaffected	≤ 7.0.*
`7.1`	unaffected	≤ *

No data.

Vendor Product Confidence Versions

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`[612762e82ae6058d69b4ce734598491bf030afe7,0bb3bd442f0bdad3932739a61dd6c580c9c1955e)`	affected	code_commit	—
`[612762e82ae6058d69b4ce734598491bf030afe7,d577c55d189e7ae150973058d13e299b6855633f)`	affected	code_commit	—
`[612762e82ae6058d69b4ce734598491bf030afe7,9e673affb92c29d9ba879bf4ea81c5e840166b56)`	affected	code_commit	—
`[612762e82ae6058d69b4ce734598491bf030afe7,45760b72e84c1a1498f1a8a9047184c85299da20)`	affected	code_commit	—
`[612762e82ae6058d69b4ce734598491bf030afe7,8f9b61d255b1e989b8913b06c8ebe0aba5e1b238)`	affected	code_commit	—
`[612762e82ae6058d69b4ce734598491bf030afe7,4bb4764f2c51f03f657a28029eb0595d8223aab5)`	affected	code_commit	—
`[612762e82ae6058d69b4ce734598491bf030afe7,4f4051e9d644c371c50de4a042b85bba6727d5c3)`	affected	code_commit	—
`[612762e82ae6058d69b4ce734598491bf030afe7,a7e8f3efd50a165ba0189f6dc57f7e51a7d149db)`	affected	code_commit	—

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`4.1`	affected	generic	—
`[0,4.1)`	unaffected	semver	—
`[5.10.259,5.11.0)`	unaffected	semver	—
`[5.15.210,5.16.0)`	unaffected	semver	—
`[6.1.176,6.2.0)`	unaffected	semver	—
`[6.6.142,6.7.0)`	unaffected	semver	—
`[6.12.92,6.13.0)`	unaffected	semver	—
`[6.18.34,6.19.0)`	unaffected	semver	—
`[7.0.11,7.1.0)`	unaffected	semver	—
`[7.1,*]`	unaffected	generic	—

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Apply a kernel update that incorporates the patch clearing DMA channel pointers on setup failure, such as the commit 0bb3bd4 or a newer released kernel that contains this fix.
If a kernel upgrade cannot be performed immediately, unload the qcom_qup module to prevent it from loading until the patch is available, using modprobe -r qcom_qup or appropriate initramfs adjustments.
Blacklist the QUP driver to stop it from loading automatically by adding "blacklist qcom_qup" to a file in /etc/modprobe.d/

Generated by OpenCVE AI on July 30, 2026 at 20:04 UTC.

Tracking

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Advisories

Source	ID	Title
Ubuntu USN	USN-8593-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8603-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8618-1	Linux kernel vulnerabilities

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00165.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/0bb3bd442f0bdad3932739a61dd6c580c9c1955e
https://git.kernel.org/stable/c/45760b72e84c1a1498f1a8a9047184c85299da20
https://git.kernel.org/stable/c/4bb4764f2c51f03f657a28029eb0595d8223aab5
https://git.kernel.org/stable/c/4f4051e9d644c371c50de4a042b85bba6727d5c3
https://git.kernel.org/stable/c/8f9b61d255b1e989b8913b06c8ebe0aba5e1b238
https://git.kernel.org/stable/c/9e673affb92c29d9ba879bf4ea81c5e840166b56
https://git.kernel.org/stable/c/a7e8f3efd50a165ba0189f6dc57f7e51a7d149db
https://git.kernel.org/stable/c/d577c55d189e7ae150973058d13e299b6855633f
https://lore.kernel.org/linux-cve-announce/2026071936-CVE-2026-64170-0eeb@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-64170
https://www.cve.org/CVERecord?id=CVE-2026-64170

History

Mon, 20 Jul 2026 12:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-825
References		https://lore.kernel.org/linux-cve-announce/2026071936-CVE-2026-64170-0eeb@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2026-64170 https://www.cve.org/CVERecord?id=CVE-2026-64170
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Moderate`

Sun, 19 Jul 2026 16:15:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: spi: qup: fix error pointer deref after DMA setup failure The driver falls back to PIO mode if DMA setup fails during probe. Make sure to the clear the DMA channel pointers on setup failure to avoid dereferencing an error pointer (or attempting to release a channel a second time) on later probe errors or driver unbind. This issue was flagged by Sashiko when reviewing a devres allocation conversion patch.
Title		spi: qup: fix error pointer deref after DMA setup failure
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/0bb3bd442f0bdad3932739a61dd6c580c9c1955e https://git.kernel.org/stable/c/45760b72e84c1a1498f1a8a9047184c85299da20 https://git.kernel.org/stable/c/4bb4764f2c51f03f657a28029eb0595d8223aab5 https://git.kernel.org/stable/c/4f4051e9d644c371c50de4a042b85bba6727d5c3 https://git.kernel.org/stable/c/8f9b61d255b1e989b8913b06c8ebe0aba5e1b238 https://git.kernel.org/stable/c/9e673affb92c29d9ba879bf4ea81c5e840166b56 https://git.kernel.org/stable/c/a7e8f3efd50a165ba0189f6dc57f7e51a7d149db https://git.kernel.org/stable/c/d577c55d189e7ae150973058d13e299b6855633f

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-07-19T15:40:54.999Z

Updated: 2026-07-19T15:40:54.999Z

Reserved: 2026-07-19T07:54:57.039Z

Link: CVE-2026-64170

Vulnrichment

No data.

NVD

No data.

Redhat

Severity : Moderate

Publid Date: 2026-07-19T00:00:00Z

Links: CVE-2026-64170 - Bugzilla

OpenCVE Enrichment

Updated: 2026-07-30T20:15:05Z

Weaknesses

CWE-825
Expired Pointer Dereference

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Subscriptions

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