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Review reviewHigh

CVE-2026-64084

Linux

In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus/adm1266) cap PDIO scan in get_multiple at ADM1266_PDIO_NR adm1266_gpio_get_multiple() iterates the PDIO portion of the caller-supplied mask using for_each_set_bit_from(gpio_nr, mask, ADM1266_GPIO_NR + ADM1266_PDIO_STATUS) { ... } where ADM1266_PDIO_STATUS is the PMBus command code (0xE9, i.e. 233), not the number of PDIO pins. The intended upper bound is ADM1266_GPIO_NR + ADM1266_PDIO_NR = 25. gpiolib hands in a mask sized for gc.ngpio (= 25 bits on this chip), so the iteration walks find_next_bit() up to 242,...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.20
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus/adm1266) cap PDIO scan in get_multiple at ADM1266_PDIO_NR adm1266_gpio_get_multiple() iterates the PDIO portion of the caller-supplied mask using for_each_set_bit_from(gpio_nr, mask, ADM1266_GPIO_NR + ADM1266_PDIO_STATUS) { ... } where ADM1266_PDIO_STATUS is the PMBus command code (0xE9, i.e. 233), not the number of PDIO pins. The intended upper bound is ADM1266_GPIO_NR + ADM1266_PDIO_NR = 25. gpiolib hands in a mask sized for gc.ngpio (= 25 bits on this chip), so the iteration walks find_next_bit() up to 242,...

Affected product and versions

Product
Linux
Affected versions
>= d98dfad35c38c037b37c4adc99df01da571031a5 < d0593e15fdeb56048a72c5c6e720f702759d0ccd, >= d98dfad35c38c037b37c4adc99df01da571031a5 < 17cee2f59029039416e8f6303050038eb59ba149, >= d98dfad35c38c037b37c4adc99df01da571031a5 < 299efd14c2eda7e5fd40025e54addd4151a01081, >= d98dfad35c38c037b37c4adc99df01da571031a5 < 4d1da9a6be5a8156c532d571c2ed237169f99244, >= d98dfad35c38c037b37c4adc99df01da571031a5 < b96c7f0bc0713dc6403912f6527d4ff9168d6fe6, >= d98dfad35c38c037b37c4adc99df01da571031a5 < fa7ca363069a70b0d1aa51e8892e3095fe2ac1ec, >= d98dfad35c38c037b37c4adc99df01da571031a5 < 2aef8f08c479f4cbc83e1e6b19d1c94d4dd24f17, >= d98dfad35c38c037b37c4adc99df01da571031a5 < d7834d92251baade796812876e95555e2066fa9f, >= 5.10
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available
CVE-2026-64084 — Linux | SECUFOCUS NOW