CVE-2026-63936
iio: adc: mt6359: fix unchecked return value in mt6358_read_imp
Description
In the Linux kernel, the following vulnerability has been resolved: iio: adc: mt6359: fix unchecked return value in mt6358_read_imp In mt6358_read_imp(), the variable val_v is passed to regmap_read() but the return value is not checked. If the read fails, val_v remains uninitialized and its random stack content is subsequently reported as a measurement result. Initialize val_v to zero to ensure a predictable value is reported in case of bus failure and to prevent potential stack data leakage. This also satisfies static analyzers that might otherwise flag the variable as used uninitialized.
INFO
Published Date :
July 19, 2026, 4:17 p.m.
Last Modified :
July 27, 2026, 5:44 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Apply the kernel patch for mt6359 driver.
- Ensure regmap_read() return value is checked.
- Initialize potentially uninitialized variables to zero.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-63936.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-63936 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-63936
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-63936 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-63936 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 19, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3587914bf61df7924933530353d840378cdc4973', 'lessThan': '6258bfec51e894ea97b8e69f3cde7af269b37de9', 'versionType': 'git'}, {'status': 'affected', 'version': '3587914bf61df7924933530353d840378cdc4973', 'lessThan': '944082fdb0284a31c0b37a88c8a1d4404da3a6d9', 'versionType': 'git'}, {'status': 'affected', 'version': '3587914bf61df7924933530353d840378cdc4973', 'lessThan': 'a72f8e51d6ee66c255a8a93a4421b8a538d112a8', 'versionType': 'git'}, {'status': 'affected', 'version': '3587914bf61df7924933530353d840378cdc4973', 'lessThan': 'f9bbd943c34a9ad60e593a4b99ce2394e4e2381b', 'versionType': 'git'}], 'programFiles': ['drivers/iio/adc/mt6359-auxadc.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.11'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.11', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.93', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.35', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.12', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/iio/adc/mt6359-auxadc.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: iio: adc: mt6359: fix unchecked return value in mt6358_read_imp In mt6358_read_imp(), the variable val_v is passed to regmap_read() but the return value is not checked. If the read fails, val_v remains uninitialized and its random stack content is subsequently reported as a measurement result. Initialize val_v to zero to ensure a predictable value is reported in case of bus failure and to prevent potential stack data leakage. This also satisfies static analyzers that might otherwise flag the variable as used uninitialized. Added Reference https://git.kernel.org/stable/c/6258bfec51e894ea97b8e69f3cde7af269b37de9 Added Reference https://git.kernel.org/stable/c/944082fdb0284a31c0b37a88c8a1d4404da3a6d9 Added Reference https://git.kernel.org/stable/c/a72f8e51d6ee66c255a8a93a4421b8a538d112a8 Added Reference https://git.kernel.org/stable/c/f9bbd943c34a9ad60e593a4b99ce2394e4e2381b