CVE-2026-74461 - Vulnerability Details

- i2c: imx: Cancel hrtimer before clearing slave pointer

Description

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

i2c: imx: Cancel hrtimer before clearing slave pointer

In i2c_imx_unreg_slave(), the slave pointer is set to NULL after
disabling interrupts. However, a pending interrupt might already
have started the hrtimer (i2c_imx_slave_timeout) before the pointer
was cleared. If the hrtimer fires after i2c_imx->slave is set to
NULL, the timer callback i2c_imx_slave_finish_op() will call
i2c_imx_slave_event() with a NULL slave pointer, which results in a
use-after-free / NULL pointer dereference.

Fix by canceling the hrtimer and waiting for it to complete after
disabling interrupts, before clearing the slave pointer.

Published: 2026-08-15

Score: 8.4 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

In the Linux kernel, the i2c_imx driver fails to cancel a pending high‑resolution timer before clearing a slave pointer during device unregistration. The timer may fire after the pointer is set to NULL, causing the callback to dereference a NULL pointer and trigger a use‑after‑free. The fault can result in a kernel crash.

Affected Systems

All Linux kernel releases that include the unmodified i2c_imx driver, up to the inclusion of the fix in the referenced commit. Systems that have removed the driver or applied the patch are not affected.

Risk and Exploitability

The CVSS score of 8.4 indicates high severity. The EPSS score of <1% suggests a low probability of widespread public exploitation at present, and the vulnerability is not listed in CISA KEV. Exploitation would likely require local or privileged access to the system's I2C bus to trigger the timeout, so the risk is confined to environments where an attacker can influence the I2C bus.

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
`f7414cd6923fd7f78e57086fc964ba2dc25db5c1`	affected	< e3da77bdb4015051656bb472c295656bbea03b6f
`f7414cd6923fd7f78e57086fc964ba2dc25db5c1`	affected	< 470fe15fb3bb2eba6629be301ca7e991ee3cfb7e
`f7414cd6923fd7f78e57086fc964ba2dc25db5c1`	affected	< a8a1f9ac3d763e721586f15479ef9140b216ddf3
`f7414cd6923fd7f78e57086fc964ba2dc25db5c1`	affected	< 753060f2b77ff2f386addbd3ecadb95b9f90cddd
`f7414cd6923fd7f78e57086fc964ba2dc25db5c1`	affected	< affd62f5719a78135b7441aa49c8cab3c3b5e838
`f7414cd6923fd7f78e57086fc964ba2dc25db5c1`	affected	< dab4762ee7f3fd0a01980d5407ba48d0261d3bff
`f7414cd6923fd7f78e57086fc964ba2dc25db5c1`	affected	< 6ac7702b6cc2b94aaed9ef2d95bfbefcdc90061f

Linux

affected

Version	Status	Constraints
`5.11`	affected	—
`0`	unaffected	< 5.11
`5.15.216`	unaffected	≤ 5.15.*
`6.1.183`	unaffected	≤ 6.1.*
`6.6.151`	unaffected	≤ 6.6.*
`6.12.103`	unaffected	≤ 6.12.*
`6.18.44`	unaffected	≤ 6.18.*
`7.1.8`	unaffected	≤ 7.1.*
`7.2`	unaffected	≤ *

No data.

Vendor Product Confidence Versions

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`[f7414cd6923fd7f78e57086fc964ba2dc25db5c1,a8a1f9ac3d763e721586f15479ef9140b216ddf3)`	affected	code_commit	—
`[f7414cd6923fd7f78e57086fc964ba2dc25db5c1,753060f2b77ff2f386addbd3ecadb95b9f90cddd)`	affected	code_commit	—
`[f7414cd6923fd7f78e57086fc964ba2dc25db5c1,affd62f5719a78135b7441aa49c8cab3c3b5e838)`	affected	code_commit	—
`[f7414cd6923fd7f78e57086fc964ba2dc25db5c1,dab4762ee7f3fd0a01980d5407ba48d0261d3bff)`	affected	code_commit	—
`[f7414cd6923fd7f78e57086fc964ba2dc25db5c1,6ac7702b6cc2b94aaed9ef2d95bfbefcdc90061f)`	affected	code_commit	—

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`5.11`	affected	generic	—
`[0,5.11)`	unaffected	generic	—
`[6.6.151,6.7.0)`	unaffected	semver	—
`[6.12.103,6.13.0)`	unaffected	semver	—
`[6.18.44,6.19.0)`	unaffected	semver	—
`[7.1.8,7.2.0)`	unaffected	semver	—
`[7.2-rc6,*]`	unaffected	generic	—

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Apply a kernel update that includes commit 6ac7702b6cc2b or later which cancels the hrtimer before clearing the slave pointer
If an update cannot be applied immediately, unbind or disable the i2c_imx module or the affected I2C device to prevent the timer callback from executing
Monitor system logs for kernel messages related to i2c_imx_slave_finish_op or crash events and block I2C traffic to the device until the driver is patched

Generated by OpenCVE AI on August 17, 2026 at 15:03 UTC.

Tracking

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Advisories

Source	ID	Title
Debian DSA	DSA-6466-1	linux security update

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

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 0.00138.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/470fe15fb3bb2eba6629be301ca7e991ee3cfb7e
https://git.kernel.org/stable/c/6ac7702b6cc2b94aaed9ef2d95bfbefcdc90061f
https://git.kernel.org/stable/c/753060f2b77ff2f386addbd3ecadb95b9f90cddd
https://git.kernel.org/stable/c/a8a1f9ac3d763e721586f15479ef9140b216ddf3
https://git.kernel.org/stable/c/affd62f5719a78135b7441aa49c8cab3c3b5e838
https://git.kernel.org/stable/c/dab4762ee7f3fd0a01980d5407ba48d0261d3bff
https://git.kernel.org/stable/c/e3da77bdb4015051656bb472c295656bbea03b6f
https://lore.kernel.org/linux-cve-announce/2026081532-CVE-2026-74461-5a10@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-74461
https://www.cve.org/CVERecord?id=CVE-2026-74461

History

Thu, 20 Aug 2026 00:15:00 +0000

Type	Values Removed	Values Added
References		https://lore.kernel.org/linux-cve-announce/2026081532-CVE-2026-74461-5a10@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2026-74461 https://www.cve.org/CVERecord?id=CVE-2026-74461
Metrics	threat_severity `None`	threat_severity `Moderate`

Wed, 19 Aug 2026 16:45:00 +0000

Type	Values Removed	Values Added
References		https://git.kernel.org/stable/c/470fe15fb3bb2eba6629be301ca7e991ee3cfb7e https://git.kernel.org/stable/c/e3da77bdb4015051656bb472c295656bbea03b6f

Mon, 17 Aug 2026 15:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-416 CWE-476

Mon, 17 Aug 2026 12:15:00 +0000

Type	Values Removed	Values Added
Weaknesses	CWE-416

Mon, 17 Aug 2026 06:00:00 +0000

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 8.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}`

Sat, 15 Aug 2026 14:45:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-416

Sat, 15 Aug 2026 12:45:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: i2c: imx: Cancel hrtimer before clearing slave pointer In i2c_imx_unreg_slave(), the slave pointer is set to NULL after disabling interrupts. However, a pending interrupt might already have started the hrtimer (i2c_imx_slave_timeout) before the pointer was cleared. If the hrtimer fires after i2c_imx->slave is set to NULL, the timer callback i2c_imx_slave_finish_op() will call i2c_imx_slave_event() with a NULL slave pointer, which results in a use-after-free / NULL pointer dereference. Fix by canceling the hrtimer and waiting for it to complete after disabling interrupts, before clearing the slave pointer.
Title		i2c: imx: Cancel hrtimer before clearing slave pointer
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/6ac7702b6cc2b94aaed9ef2d95bfbefcdc90061f https://git.kernel.org/stable/c/753060f2b77ff2f386addbd3ecadb95b9f90cddd https://git.kernel.org/stable/c/a8a1f9ac3d763e721586f15479ef9140b216ddf3 https://git.kernel.org/stable/c/affd62f5719a78135b7441aa49c8cab3c3b5e838 https://git.kernel.org/stable/c/dab4762ee7f3fd0a01980d5407ba48d0261d3bff

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-08-15T12:27:01.924Z

Updated: 2026-08-19T16:37:00.344Z

Reserved: 2026-08-15T05:44:03.901Z

Link: CVE-2026-74461

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-08-15T13:17:50.763

Modified: 2026-08-19T17:21:03.083

Link: CVE-2026-74461

Redhat

Severity : Moderate

Publid Date: 2026-08-15T00:00:00Z

Links: CVE-2026-74461 - Bugzilla

OpenCVE Enrichment

Updated: 2026-08-17T15:15:04Z

Weaknesses

CWE-416
Use After Free
CWE-476
NULL Pointer Dereference

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Subscriptions

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