{"api_version":"1","generated_at":"2026-07-21T17:50:08+00:00","cve":"CVE-2026-64087","urls":{"html":"https://cve.report/CVE-2026-64087","api":"https://cve.report/api/cve/CVE-2026-64087.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64087","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64087"},"summary":{"title":"hwmon: (pmbus/adm1266) reject implausible blackbox record_count","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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:49","updated_at":"2026-07-19 16:17:49"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/4afca954622d672ea65ed961bed01cf91caa034e","name":"https://git.kernel.org/stable/c/4afca954622d672ea65ed961bed01cf91caa034e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/231db52a5b64d0a9769e298dadc148e1f79b26a6","name":"https://git.kernel.org/stable/c/231db52a5b64d0a9769e298dadc148e1f79b26a6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/adcb163ad7cacca317872fc62bd8885e842e45e3","name":"https://git.kernel.org/stable/c/adcb163ad7cacca317872fc62bd8885e842e45e3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0e791cd0140fb136083565aadfbe0f705aa260d0","name":"https://git.kernel.org/stable/c/0e791cd0140fb136083565aadfbe0f705aa260d0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c2c56092710fe8a893b67b5a3d7e62808d02d84d","name":"https://git.kernel.org/stable/c/c2c56092710fe8a893b67b5a3d7e62808d02d84d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5469e1e7c411acc15fdd8262c99c3ebd9defd594","name":"https://git.kernel.org/stable/c/5469e1e7c411acc15fdd8262c99c3ebd9defd594","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/75c862adf3d3caab4f49bb3530723c215376e37c","name":"https://git.kernel.org/stable/c/75c862adf3d3caab4f49bb3530723c215376e37c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f85c81e93dbd6915970bd5f3bffcf62633c4c54c","name":"https://git.kernel.org/stable/c/f85c81e93dbd6915970bd5f3bffcf62633c4c54c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64087","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64087","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 adcb163ad7cacca317872fc62bd8885e842e45e3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 c2c56092710fe8a893b67b5a3d7e62808d02d84d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 5469e1e7c411acc15fdd8262c99c3ebd9defd594 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 f85c81e93dbd6915970bd5f3bffcf62633c4c54c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.209 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.175 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.142 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.92 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.34 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.11 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64087","cve":"CVE-2026-64087","epss":"0.001840000","percentile":"0.082500000","score_date":"2026-07-20","updated_at":"2026-07-21 00:13:14"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/hwmon/pmbus/adm1266.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"adcb163ad7cacca317872fc62bd8885e842e45e3","status":"affected","version":"15609d1893020436e1e8ccfd9ded774a96dd17a2","versionType":"git"},{"lessThan":"c2c56092710fe8a893b67b5a3d7e62808d02d84d","status":"affected","version":"15609d1893020436e1e8ccfd9ded774a96dd17a2","versionType":"git"},{"lessThan":"5469e1e7c411acc15fdd8262c99c3ebd9defd594","status":"affected","version":"15609d1893020436e1e8ccfd9ded774a96dd17a2","versionType":"git"},{"lessThan":"f85c81e93dbd6915970bd5f3bffcf62633c4c54c","status":"affected","version":"15609d1893020436e1e8ccfd9ded774a96dd17a2","versionType":"git"},{"lessThan":"0e791cd0140fb136083565aadfbe0f705aa260d0","status":"affected","version":"15609d1893020436e1e8ccfd9ded774a96dd17a2","versionType":"git"},{"lessThan":"75c862adf3d3caab4f49bb3530723c215376e37c","status":"affected","version":"15609d1893020436e1e8ccfd9ded774a96dd17a2","versionType":"git"},{"lessThan":"231db52a5b64d0a9769e298dadc148e1f79b26a6","status":"affected","version":"15609d1893020436e1e8ccfd9ded774a96dd17a2","versionType":"git"},{"lessThan":"4afca954622d672ea65ed961bed01cf91caa034e","status":"affected","version":"15609d1893020436e1e8ccfd9ded774a96dd17a2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/hwmon/pmbus/adm1266.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.10"},{"lessThan":"5.10","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.142","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.92","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.34","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.258","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.209","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.175","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.142","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.92","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.34","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.11","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"5.10","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-07-19T15:39:57.371Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/adcb163ad7cacca317872fc62bd8885e842e45e3"},{"url":"https://git.kernel.org/stable/c/c2c56092710fe8a893b67b5a3d7e62808d02d84d"},{"url":"https://git.kernel.org/stable/c/5469e1e7c411acc15fdd8262c99c3ebd9defd594"},{"url":"https://git.kernel.org/stable/c/f85c81e93dbd6915970bd5f3bffcf62633c4c54c"},{"url":"https://git.kernel.org/stable/c/0e791cd0140fb136083565aadfbe0f705aa260d0"},{"url":"https://git.kernel.org/stable/c/75c862adf3d3caab4f49bb3530723c215376e37c"},{"url":"https://git.kernel.org/stable/c/231db52a5b64d0a9769e298dadc148e1f79b26a6"},{"url":"https://git.kernel.org/stable/c/4afca954622d672ea65ed961bed01cf91caa034e"}],"title":"hwmon: (pmbus/adm1266) reject implausible blackbox record_count","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64087","datePublished":"2026-07-19T15:39:57.371Z","dateReserved":"2026-07-19T07:54:57.032Z","dateUpdated":"2026-07-19T15:39:57.371Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:49","lastModifiedDate":"2026-07-19 16:17:49","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64087","Ordinal":"1","Title":"hwmon: (pmbus/adm1266) reject implausible blackbox record_count","CVE":"CVE-2026-64087","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64087","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"hwmon: (pmbus/adm1266) reject implausible blackbox record_count"}]}}}