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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-64135 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus/adm1266) widen blackbox-info buffer to I2C_SMBUS_BLOCK_MAX adm1266_nvmem_read_blackbox() declares a 5-byte stack buffer and passes it to i2c_smbus_read_block_data() to retrieve the 4-byte BLACKBOX_INFO response. i2c_smbus_read_block_data() does not honour caller buffer sizes -- it memcpy()s data.block[0] bytes from the SMBus transaction (where data.block[0] is the length byte returned by the slave device, up to I2C_SMBUS_BLOCK_MAX = 32): memcpy(values, &data.block[1], data.block[0]); If the device returns any block length above 5, the call overflows the caller's 5-byte stack buffer before the post-call if (ret != 4) return -EIO; check has a chance to reject the response. Widen the local buffer to I2C_SMBUS_BLOCK_MAX so the helper has room for any well-formed SMBus block response, matching the convention used by the other i2c_smbus_read_block_data() callers in this driver.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/0dbf64c502443c08c2e28a77ecbfcc5479d93228 kernel.org
https://git.kernel.org/stable/c/2b7a698d5093b548c464828d984f05ced5f3fd2a kernel.org
https://git.kernel.org/stable/c/33251abb9c9dd62943be76f0427c5527ee39188f kernel.org
https://git.kernel.org/stable/c/6ed16a40b162e9d87d9ac8bed4d7f0e3e807700e kernel.org
https://git.kernel.org/stable/c/7f705e581ef3e6bb308a121a89adf5237d968204 kernel.org
https://git.kernel.org/stable/c/ba09f4baa5bd96c5d26c942defa546a72dbbe5bf kernel.org
https://git.kernel.org/stable/c/ca560f7566df7e2826c2999e959e6b94eb938f76 kernel.org
https://git.kernel.org/stable/c/eee213daa1e1b402eb631bcd1b8c5aa340a6b081 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-64135
NVD Published Date:
07/19/2026
NVD Last Modified:
07/19/2026
Source:
kernel.org