Linux Kernel up to 7.1.7 imx i2c_imx_reg_slave slave/last_slave_event null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.37

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 7.1.7. This vulnerability affects the function i2c_imx_reg_slave of the component imx. The manipulation of the argument slave/last_slave_event results in null pointer dereference. This vulnerability is known as CVE-2026-80678. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 7.1.7. Affected is the function i2c_imx_reg_slave of the component imx. The manipulation of the argument slave/last_slave_event with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: i2c: imx: Fix slave registration race and error handling In i2c_imx_reg_slave(), the slave pointer was assigned before pm_runtime_resume_and_get(). If pm_runtime_resume_and_get() failed, the error path returned without clearing i2c_imx->slave, leaving it non-NULL and causing all subsequent registration attempts to fail with -EBUSY. Additionally, because this driver uses a shared IRQ, the interrupt handler i2c_imx_isr() can execute concurrently and, after acquiring slave_lock, dereference i2c_imx->slave. The previous fix attempt added a lockless i2c_imx->slave = NULL on the error path, but that could race with the ISR under the lock and still cause a NULL pointer dereference. Fix both issues by deferring the assignment of i2c_imx->slave and i2c_imx->last_slave_event to after a successful resume, and by performing the assignment inside the slave_lock critical section. This guarantees that the slave pointer is never left stale on the error path and is always valid when observed by the interrupt handler.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2026-80678 since 08/26/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/28/2026).

Upgrading to version 5.15.217, 6.1.183, 6.6.151, 6.12.103, 6.18.44 or 7.1.8 eliminates this vulnerability. Applying the patch 754bc62f72fd64b202462367134ac8ce95b005de/cfdf6e13518589f911b7eace6ccb788e4ed87397/b9f6f4883b9ac86654e75899d0dbf8a7a96ad5d8/d6748f6802f3eebafaa16a5e5dcfbfb9b3bc173f/12a4f0950a158d98552cbaeacc35edccd8d975fa/614ca6594e301ff682999797c2216e9685558a2b/d64ec362c369bbc33833f7936d5f3a706b0d5c45 is able to eliminate this problem.

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Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.15.217/6.1.183/6.6.151/6.12.103/6.18.44/7.1.8
Patch: 754bc62f72fd64b202462367134ac8ce95b005de/cfdf6e13518589f911b7eace6ccb788e4ed87397/b9f6f4883b9ac86654e75899d0dbf8a7a96ad5d8/d6748f6802f3eebafaa16a5e5dcfbfb9b3bc173f/12a4f0950a158d98552cbaeacc35edccd8d975fa/614ca6594e301ff682999797c2216e9685558a2b/d64ec362c369bbc33833f7936d5f3a706b0d5c45

Timelineinfo

08/26/2026 CVE reserved
08/28/2026 +2 days Advisory disclosed
08/28/2026 +0 days VulDB entry created
08/28/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-80678 (🔒)
GCVE (CVE): GCVE-0-2026-80678
GCVE (VulDB): GCVE-100-396630

Entryinfo

Created: 08/28/2026 10:56
Changes: 08/28/2026 10:56 (60)
Complete: 🔍
Cache ID: 216::103

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