cve-2026-64087

MEDIUM CVSS 5.5 nvd
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.

Timeline
Published
2026-07-19
Last Modified
2026-09-03
CVSS Details
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
Affected Products
  • linux linux_kernel
CVSS metrics
Version Base Severity Vector Exploitability Impact Source
3.1 5.5 MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H 1.8 3.6 nvd@nist.gov
CPE configurations
OR
CPE Version range Vulnerable
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* >= 5.10, < 5.10.258 yes
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* >= 5.11, < 5.15.209 yes
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* >= 5.16, < 6.1.175 yes
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* >= 6.2, < 6.6.142 yes
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* >= 6.7, < 6.12.92 yes
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* >= 6.13, < 6.18.34 yes
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* >= 6.19, < 7.0.11 yes
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* — yes
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* — yes
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* — yes
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* — yes
NVD metadata
NVD status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
Linked Vulnerabilities

No linked vulnerabilities found.

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  "title": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus/adm1266) reject implausible blackb..."
}
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