CVE-2026-64087

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> hwmon: (pmbus/adm1266) reject implausible blackbox record_count<br /> <br /> adm1266_nvmem_read_blackbox() loops over a record_count that comes<br /> straight from byte 3 of the BLACKBOX_INFO response. The destination<br /> buffer is data-&gt;dev_mem, sized for the nvmem cell&amp;#39;s declared 2048<br /> bytes (ADM1266_BLACKBOX_MAX_RECORDS * ADM1266_BLACKBOX_SIZE = 32 * 64).<br /> A device that reports a record_count greater than 32 -- whether due<br /> to firmware bugs, bus corruption, or a non-responsive slave returning<br /> 0xff -- would walk read_buff past the end of the dev_mem allocation<br /> on the trailing iterations.<br /> <br /> Cap record_count at ADM1266_BLACKBOX_MAX_RECORDS (introduced here)<br /> before entering the loop and return -EIO on any larger value, so a<br /> malformed BLACKBOX_INFO response cannot drive the loop out of bounds.