{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64087", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.032Z", "datePublished": "2026-07-19T15:39:57.371Z", "dateUpdated": "2026-07-19T15:39:57.371Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T15:39:57.371Z"}, "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."}], "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": "15609d1893020436e1e8ccfd9ded774a96dd17a2", "lessThan": "adcb163ad7cacca317872fc62bd8885e842e45e3", "status": "affected", "versionType": "git"}, {"version": "15609d1893020436e1e8ccfd9ded774a96dd17a2", "lessThan": "c2c56092710fe8a893b67b5a3d7e62808d02d84d", "status": "affected", "versionType": "git"}, {"version": "15609d1893020436e1e8ccfd9ded774a96dd17a2", "lessThan": "5469e1e7c411acc15fdd8262c99c3ebd9defd594", "status": "affected", "versionType": "git"}, {"version": "15609d1893020436e1e8ccfd9ded774a96dd17a2", "lessThan": "f85c81e93dbd6915970bd5f3bffcf62633c4c54c", "status": "affected", "versionType": "git"}, {"version": "15609d1893020436e1e8ccfd9ded774a96dd17a2", "lessThan": "0e791cd0140fb136083565aadfbe0f705aa260d0", "status": "affected", "versionType": "git"}, {"version": "15609d1893020436e1e8ccfd9ded774a96dd17a2", "lessThan": "75c862adf3d3caab4f49bb3530723c215376e37c", "status": "affected", "versionType": "git"}, {"version": "15609d1893020436e1e8ccfd9ded774a96dd17a2", "lessThan": "231db52a5b64d0a9769e298dadc148e1f79b26a6", "status": "affected", "versionType": "git"}, {"version": "15609d1893020436e1e8ccfd9ded774a96dd17a2", "lessThan": "4afca954622d672ea65ed961bed01cf91caa034e", "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": 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{"bugzilla": {"description": "kernel: hwmon: (pmbus/adm1266) reject implausible blackbox record_count", "id": "2502515", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502515"}, "csaw": false, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nhwmon: (pmbus/adm1266) reject implausible blackbox record_count\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.\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.", "A flaw was found in the Linux kernel's `pmbus/adm1266` driver. A malformed response from a hardware monitoring device could cause the driver to read beyond the allocated memory buffer. This out-of-bounds read can lead to system instability or denial of service."], "name": "CVE-2026-64087", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64087\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64087\nhttps://lore.kernel.org/linux-cve-announce/2026071916-CVE-2026-64087-8589@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15609d1893020436e1e8ccfd9ded774a96dd17a2,adcb163ad7cacca317872fc62bd8885e842e45e3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15609d1893020436e1e8ccfd9ded774a96dd17a2,c2c56092710fe8a893b67b5a3d7e62808d02d84d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15609d1893020436e1e8ccfd9ded774a96dd17a2,5469e1e7c411acc15fdd8262c99c3ebd9defd594)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15609d1893020436e1e8ccfd9ded774a96dd17a2,f85c81e93dbd6915970bd5f3bffcf62633c4c54c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15609d1893020436e1e8ccfd9ded774a96dd17a2,0e791cd0140fb136083565aadfbe0f705aa260d0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15609d1893020436e1e8ccfd9ded774a96dd17a2,75c862adf3d3caab4f49bb3530723c215376e37c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15609d1893020436e1e8ccfd9ded774a96dd17a2,231db52a5b64d0a9769e298dadc148e1f79b26a6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15609d1893020436e1e8ccfd9ded774a96dd17a2,4afca954622d672ea65ed961bed01cf91caa034e)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.10"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.10)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.258,5.11.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.209,5.16.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.175,6.2.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.142,6.7.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.92,6.13.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.34,6.19.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.11,7.1.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-21T17:30:09.609837+00:00", "updated": "2026-07-25T00:30:17.301737+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}