{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64086","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-19T07:54:57.032Z","datePublished":"2026-07-19T15:39:56.749Z","dateUpdated":"2026-07-20T13:43:10.387Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-07-20T13:43:10.387Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus/adm1266) include PEC byte in pmbus_block_xfer read buffer\n\nadm1266_pmbus_block_xfer() sets up the read transaction with\n\n\t.buf = data->read_buf,\n\t.len = ADM1266_PMBUS_BLOCK_MAX + 2,\n\nbut read_buf in struct adm1266_data is declared as\n\n\tu8 read_buf[ADM1266_PMBUS_BLOCK_MAX + 1];\n\nFor a max-length block response (length byte = 255 + up to 1 PEC\nbyte), the i2c controller is told to write 257 bytes into a 256-byte\nbuffer, putting one byte past the end of read_buf.  The same response\nalso makes the subsequent PEC compare\n\n\tif (crc != msgs[1].buf[msgs[1].buf[0] + 1])\n\nread a byte beyond the array.\n\nBump the read_buf declaration to ADM1266_PMBUS_BLOCK_MAX + 2 so the\nbuffer can hold the length byte, up to 255 payload bytes, and the PEC\nbyte the i2c_msg length already accounts for."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/pmbus/adm1266.c"],"versions":[{"version":"407dc802a9c0809ca6a48de4b4c63305eb84ef56","lessThan":"397d3f523bfff2f4e3dacf9b1339bd76dc207f78","status":"affected","versionType":"git"},{"version":"407dc802a9c0809ca6a48de4b4c63305eb84ef56","lessThan":"472744f69d25a2d5111ad62f1d62579dce2c13c8","status":"affected","versionType":"git"},{"version":"407dc802a9c0809ca6a48de4b4c63305eb84ef56","lessThan":"528a9f88e88502d0c2f2052a279415074cd83715","status":"affected","versionType":"git"},{"version":"407dc802a9c0809ca6a48de4b4c63305eb84ef56","lessThan":"d94ceb16e55b6d8019ab069e357c76ac42f0ffbc","status":"affected","versionType":"git"},{"version":"407dc802a9c0809ca6a48de4b4c63305eb84ef56","lessThan":"bd5be3fa5de6dbf61f1b3cec6b79c2c2f8065694","status":"affected","versionType":"git"},{"version":"407dc802a9c0809ca6a48de4b4c63305eb84ef56","lessThan":"2279c342d94eca225bf9f301c8806a05a1c81619","status":"affected","versionType":"git"},{"version":"407dc802a9c0809ca6a48de4b4c63305eb84ef56","lessThan":"a6c802145a8de0830bca803c6d415f7e9e683624","status":"affected","versionType":"git"},{"version":"407dc802a9c0809ca6a48de4b4c63305eb84ef56","lessThan":"487566cb1ccdf3756fdd7bf8d875e612ff3169bb","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/pmbus/adm1266.c"],"versions":[{"version":"5.10","status":"affected"},{"version":"0","lessThan":"5.10","status":"unaffected","versionType":"semver"},{"version":"5.10.258","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.209","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.175","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.142","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.92","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.34","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.11","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.6.142"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.12.92"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.18.34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"7.0.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/397d3f523bfff2f4e3dacf9b1339bd76dc207f78"},{"url":"https://git.kernel.org/stable/c/472744f69d25a2d5111ad62f1d62579dce2c13c8"},{"url":"https://git.kernel.org/stable/c/528a9f88e88502d0c2f2052a279415074cd83715"},{"url":"https://git.kernel.org/stable/c/d94ceb16e55b6d8019ab069e357c76ac42f0ffbc"},{"url":"https://git.kernel.org/stable/c/bd5be3fa5de6dbf61f1b3cec6b79c2c2f8065694"},{"url":"https://git.kernel.org/stable/c/2279c342d94eca225bf9f301c8806a05a1c81619"},{"url":"https://git.kernel.org/stable/c/a6c802145a8de0830bca803c6d415f7e9e683624"},{"url":"https://git.kernel.org/stable/c/487566cb1ccdf3756fdd7bf8d875e612ff3169bb"}],"title":"hwmon: (pmbus/adm1266) include PEC byte in pmbus_block_xfer read buffer","x_generator":{"engine":"bippy-1.2.0"}}}}