CVE-2026-64087
hwmon: (pmbus/adm1266) reject implausible blackbox record_count
Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus/adm1266) reject implausible blackbox record_count adm1266_nvmem_read_blackbox() loops over a record_count that comes straight from byte 3 of the BLACKBOX_INFO response. The destination buffer is data->dev_mem, sized for the nvmem cell's declared 2048 bytes (ADM1266_BLACKBOX_MAX_RECORDS * ADM1266_BLACKBOX_SIZE = 32 * 64). A device that reports a record_count greater than 32 -- whether due to firmware bugs, bus corruption, or a non-responsive slave returning 0xff -- would walk read_buff past the end of the dev_mem allocation on the trailing iterations. Cap record_count at ADM1266_BLACKBOX_MAX_RECORDS (introduced here) before entering the loop and return -EIO on any larger value, so a malformed BLACKBOX_INFO response cannot drive the loop out of bounds.
INFO
Published Date :
July 19, 2026, 4:17 p.m.
Last Modified :
July 19, 2026, 4:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-64087
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Cap record_count at ADM1266_BLACKBOX_MAX_RECORDS.
- Return -EIO for larger record_count values.
- Apply the kernel patch to prevent buffer overflows.
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-2026-64087.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64087 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-2026-64087
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64087 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64087 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.
-
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': '15609d1893020436e1e8ccfd9ded774a96dd17a2', 'lessThan': 'adcb163ad7cacca317872fc62bd8885e842e45e3', 'versionType': 'git'}, {'status': 'affected', 'version': '15609d1893020436e1e8ccfd9ded774a96dd17a2', 'lessThan': 'c2c56092710fe8a893b67b5a3d7e62808d02d84d', 'versionType': 'git'}, {'status': 'affected', 'version': '15609d1893020436e1e8ccfd9ded774a96dd17a2', 'lessThan': '5469e1e7c411acc15fdd8262c99c3ebd9defd594', 'versionType': 'git'}, {'status': 'affected', 'version': '15609d1893020436e1e8ccfd9ded774a96dd17a2', 'lessThan': 'f85c81e93dbd6915970bd5f3bffcf62633c4c54c', 'versionType': 'git'}, {'status': 'affected', 'version': '15609d1893020436e1e8ccfd9ded774a96dd17a2', 'lessThan': '0e791cd0140fb136083565aadfbe0f705aa260d0', 'versionType': 'git'}, {'status': 'affected', 'version': '15609d1893020436e1e8ccfd9ded774a96dd17a2', 'lessThan': '75c862adf3d3caab4f49bb3530723c215376e37c', 'versionType': 'git'}, {'status': 'affected', 'version': '15609d1893020436e1e8ccfd9ded774a96dd17a2', 'lessThan': '231db52a5b64d0a9769e298dadc148e1f79b26a6', 'versionType': 'git'}, {'status': 'affected', 'version': '15609d1893020436e1e8ccfd9ded774a96dd17a2', 'lessThan': '4afca954622d672ea65ed961bed01cf91caa034e', 'versionType': 'git'}], 'programFiles': ['drivers/hwmon/pmbus/adm1266.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.10'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.10', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.258', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.209', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.142', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.92', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.34', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.11', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/hwmon/pmbus/adm1266.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus/adm1266) reject implausible blackbox record_count adm1266_nvmem_read_blackbox() loops over a record_count that comes straight from byte 3 of the BLACKBOX_INFO response. The destination buffer is data->dev_mem, sized for the nvmem cell's declared 2048 bytes (ADM1266_BLACKBOX_MAX_RECORDS * ADM1266_BLACKBOX_SIZE = 32 * 64). A device that reports a record_count greater than 32 -- whether due to firmware bugs, bus corruption, or a non-responsive slave returning 0xff -- would walk read_buff past the end of the dev_mem allocation on the trailing iterations. Cap record_count at ADM1266_BLACKBOX_MAX_RECORDS (introduced here) before entering the loop and return -EIO on any larger value, so a malformed BLACKBOX_INFO response cannot drive the loop out of bounds. Added Reference https://git.kernel.org/stable/c/0e791cd0140fb136083565aadfbe0f705aa260d0 Added Reference https://git.kernel.org/stable/c/231db52a5b64d0a9769e298dadc148e1f79b26a6 Added Reference https://git.kernel.org/stable/c/4afca954622d672ea65ed961bed01cf91caa034e Added Reference https://git.kernel.org/stable/c/5469e1e7c411acc15fdd8262c99c3ebd9defd594 Added Reference https://git.kernel.org/stable/c/75c862adf3d3caab4f49bb3530723c215376e37c Added Reference https://git.kernel.org/stable/c/adcb163ad7cacca317872fc62bd8885e842e45e3 Added Reference https://git.kernel.org/stable/c/c2c56092710fe8a893b67b5a3d7e62808d02d84d Added Reference https://git.kernel.org/stable/c/f85c81e93dbd6915970bd5f3bffcf62633c4c54c