CVE-2026-64084hwmon: (pmbus/adm1266) cap PDIO scan in get_multiple at ADM1266_PDIO_NR
- 7.8HighCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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, reading up to 217 extra bits (a handful of unsigned-long words: four on 64-bit, seven on 32-bit) of whatever lives past the end of the mask in the caller's stack. Any incidental set bit in that range then drives a set_bit(gpio_nr, bits) call that writes past the end of the caller-supplied bits array too -- both out-of-bounds. Substitute ADM1266_PDIO_NR for the constant so the scan stops at the last real PDIO bit.
Timeline
ID reserved
By Linux
Published
- 17 days later
· 17 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.14% · top 97% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected d98dfad35c38c037b37c4adc99df01da571031a5 – < d0593e15fdeb56048a72c5c6e720f702759d0ccd
- affected d98dfad35c38c037b37c4adc99df01da571031a5 – < 17cee2f59029039416e8f6303050038eb59ba149
- affected d98dfad35c38c037b37c4adc99df01da571031a5 – < 299efd14c2eda7e5fd40025e54addd4151a01081
- affected d98dfad35c38c037b37c4adc99df01da571031a5 – < 4d1da9a6be5a8156c532d571c2ed237169f99244
- affected d98dfad35c38c037b37c4adc99df01da571031a5 – < b96c7f0bc0713dc6403912f6527d4ff9168d6fe6
- affected d98dfad35c38c037b37c4adc99df01da571031a5 – < fa7ca363069a70b0d1aa51e8892e3095fe2ac1ec
- affected d98dfad35c38c037b37c4adc99df01da571031a5 – < 2aef8f08c479f4cbc83e1e6b19d1c94d4dd24f17
- affected d98dfad35c38c037b37c4adc99df01da571031a5 – < d7834d92251baade796812876e95555e2066fa9f
- affected 5.10
- unaffected < 5.10
- unaffected 5.10.258 – ≤ 5.10.*
- unaffected 5.15.209 – ≤ 5.15.*
- unaffected 6.1.175 – ≤ 6.1.*
- unaffected 6.6.142 – ≤ 6.6.*
- unaffected 6.12.92 – ≤ 6.12.*
- unaffected 6.18.34 – ≤ 6.18.*
- unaffected 7.0.11 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References8
- https://git.kernel.org/stable/c/d0593e15fdeb56048a72c5c6e720f702759d0ccd (opens in a new tab)
- https://git.kernel.org/stable/c/17cee2f59029039416e8f6303050038eb59ba149 (opens in a new tab)
- https://git.kernel.org/stable/c/299efd14c2eda7e5fd40025e54addd4151a01081 (opens in a new tab)
- https://git.kernel.org/stable/c/4d1da9a6be5a8156c532d571c2ed237169f99244 (opens in a new tab)
- https://git.kernel.org/stable/c/b96c7f0bc0713dc6403912f6527d4ff9168d6fe6 (opens in a new tab)
- https://git.kernel.org/stable/c/fa7ca363069a70b0d1aa51e8892e3095fe2ac1ec (opens in a new tab)
- https://git.kernel.org/stable/c/2aef8f08c479f4cbc83e1e6b19d1c94d4dd24f17 (opens in a new tab)
- https://git.kernel.org/stable/c/d7834d92251baade796812876e95555e2066fa9f (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-45657 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64084)Record last updated .