{"cve":"CVE-2026-64087","nvd":{"published":"2026-07-19T16:17:49.433","modified":"2026-09-03T16:12:43.563","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus/adm1266) reject implausible blackbox record_count\n\nadm1266_nvmem_read_blackbox() loops over a record_count that comes\nstraight from byte 3 of the BLACKBOX_INFO response.  The destination\nbuffer is data->dev_mem, sized for the nvmem cell's declared 2048\nbytes (ADM1266_BLACKBOX_MAX_RECORDS * ADM1266_BLACKBOX_SIZE = 32 * 64).\nA device that reports a record_count greater than 32 -- whether due\nto firmware bugs, bus corruption, or a non-responsive slave returning\n0xff -- would walk read_buff past the end of the dev_mem allocation\non the trailing iterations.\n\nCap record_count at ADM1266_BLACKBOX_MAX_RECORDS (introduced here)\nbefore entering the loop and return -EIO on any larger value, so a\nmalformed BLACKBOX_INFO response cannot drive the loop out of bounds.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/0e791cd0140fb136083565aadfbe0f705aa260d0","https://git.kernel.org/stable/c/231db52a5b64d0a9769e298dadc148e1f79b26a6","https://git.kernel.org/stable/c/4afca954622d672ea65ed961bed01cf91caa034e","https://git.kernel.org/stable/c/5469e1e7c411acc15fdd8262c99c3ebd9defd594","https://git.kernel.org/stable/c/75c862adf3d3caab4f49bb3530723c215376e37c"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:45:36.895656543+00:00"},"epss":{"cve":"CVE-2026-64087","score":0.00128,"percentile":0.0243,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}