CVE-2026-64087hwmon: (pmbus/adm1266) reject implausible blackbox record_count
- 5.5MediumCVSS base score
- 0.13%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) 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
ID reserved
By Linux
Published
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 |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 – < adcb163ad7cacca317872fc62bd8885e842e45e3
- affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 – < c2c56092710fe8a893b67b5a3d7e62808d02d84d
- affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 – < 5469e1e7c411acc15fdd8262c99c3ebd9defd594
- affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 – < f85c81e93dbd6915970bd5f3bffcf62633c4c54c
- affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 – < 0e791cd0140fb136083565aadfbe0f705aa260d0
- affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 – < 75c862adf3d3caab4f49bb3530723c215376e37c
- affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 – < 231db52a5b64d0a9769e298dadc148e1f79b26a6
- affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 – < 4afca954622d672ea65ed961bed01cf91caa034e
- 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/adcb163ad7cacca317872fc62bd8885e842e45e3 (opens in a new tab)
- https://git.kernel.org/stable/c/c2c56092710fe8a893b67b5a3d7e62808d02d84d (opens in a new tab)
- https://git.kernel.org/stable/c/5469e1e7c411acc15fdd8262c99c3ebd9defd594 (opens in a new tab)
- https://git.kernel.org/stable/c/f85c81e93dbd6915970bd5f3bffcf62633c4c54c (opens in a new tab)
- https://git.kernel.org/stable/c/0e791cd0140fb136083565aadfbe0f705aa260d0 (opens in a new tab)
- https://git.kernel.org/stable/c/75c862adf3d3caab4f49bb3530723c215376e37c (opens in a new tab)
- https://git.kernel.org/stable/c/231db52a5b64d0a9769e298dadc148e1f79b26a6 (opens in a new tab)
- https://git.kernel.org/stable/c/4afca954622d672ea65ed961bed01cf91caa034e (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-2026-45772 (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-2026-64087)Record last updated .