CVE-2026-64087In 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…
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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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Sep 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linux linux_kernel linux:linux_kernel | from 5.10 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.142; from 6.7 before 6.12.92; from 6.13 before 6.18.34; from 6.19 before 7.0.11; 7.1; and 3 more ranges | NVD |
References
- https://git.kernel.org/stable/c/0e791cd0140fb136083565aadfbe0f705aa260d0patch
- https://git.kernel.org/stable/c/231db52a5b64d0a9769e298dadc148e1f79b26a6patch
- https://git.kernel.org/stable/c/4afca954622d672ea65ed961bed01cf91caa034epatch
- https://git.kernel.org/stable/c/5469e1e7c411acc15fdd8262c99c3ebd9defd594patch
- https://git.kernel.org/stable/c/75c862adf3d3caab4f49bb3530723c215376e37cpatch
- https://git.kernel.org/stable/c/adcb163ad7cacca317872fc62bd8885e842e45e3patch
- https://git.kernel.org/stable/c/c2c56092710fe8a893b67b5a3d7e62808d02d84dpatch
- https://git.kernel.org/stable/c/f85c81e93dbd6915970bd5f3bffcf62633c4c54cpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.