CVE-2026-23197
Unknown Unknown - Not Provided
Buffer Overflow in Linux i2c_imx Driver Causes System Crash

Publication date: 2026-02-14

Last updated on: 2026-03-19

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: i2c: imx: preserve error state in block data length handler When a block read returns an invalid length, zero or >I2C_SMBUS_BLOCK_MAX, the length handler sets the state to IMX_I2C_STATE_FAILED. However, i2c_imx_master_isr() unconditionally overwrites this with IMX_I2C_STATE_READ_CONTINUE, causing an endless read loop that overruns buffers and crashes the system. Guard the state transition to preserve error states set by the length handler.
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Meta Information
Published
2026-02-14
Last Modified
2026-03-19
Generated
2026-06-16
AI Q&A
2026-02-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-23197
EUVD
EUVD-2026-5847
Affected Vendors & Products
Showing 9 associated CPEs
Vendor Product Version / Range
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel From 6.13 (inc) to 6.18.10 (exc)
linux linux_kernel 6.19
linux linux_kernel 6.19
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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Executive Summary

This vulnerability exists in the Linux kernel's i2c imx driver. When a block read operation returns an invalid length (either zero or greater than the maximum allowed), the length handler sets an error state (IMX_I2C_STATE_FAILED). However, the interrupt service routine (i2c_imx_master_isr) incorrectly overwrites this error state with a state that continues reading (IMX_I2C_STATE_READ_CONTINUE), leading to an endless read loop.

This endless loop causes buffer overruns and ultimately crashes the system. The fix involves guarding the state transition to preserve the error state set by the length handler, preventing the system from entering the endless loop.

Impact Analysis

This vulnerability can cause the affected Linux system to enter an endless read loop when an invalid block read length is encountered. This loop overruns buffers and crashes the system, potentially leading to denial of service.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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