{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64085", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.032Z", "datePublished": "2026-07-19T15:39:56.067Z", "dateUpdated": "2026-07-19T15:39:56.067Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T15:39:56.067Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus/adm1266) bounce blackbox records through a protocol-sized buffer\n\nadm1266_pmbus_block_xfer() copies the device-supplied block payload\ninto the caller-provided buffer using the device-supplied length:\n\n\tmemcpy(data_r, &msgs[1].buf[1], msgs[1].buf[0]);\n\nThe helper does not know how large data_r is and trusts the device to\nreturn at most one record's worth of bytes. adm1266_nvmem_read_blackbox()\nviolates that contract: it advances read_buff inside data->dev_mem in\nADM1266_BLACKBOX_SIZE (64-byte) strides while the helper is willing to\nwrite up to ADM1266_PMBUS_BLOCK_MAX (255) bytes. A device that returns\nmore than 64 bytes on the trailing record (read_buff offset 1984 in\nthe 2048-byte dev_mem allocation) overflows dev_mem by up to 191 bytes\nbefore the post-call\n\n\tif (ret != ADM1266_BLACKBOX_SIZE)\n\t\treturn -EIO;\n\ncan reject the response.\n\nContain the fix in the caller without changing the helper signature:\nread each record into a 255-byte local bounce buffer that matches the\nhelper's maximum output, validate the returned length, and only then\ncopy exactly ADM1266_BLACKBOX_SIZE bytes into the dev_mem slot."}], "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": "7896d87cbb05e097efc113243d4e38f9f8cea16c", "status": "affected", "versionType": "git"}, {"version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56", "lessThan": "9d5309500b4607b7198e19f0a3fa13eb864cd5fb", "status": "affected", "versionType": "git"}, {"version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56", "lessThan": "6098634cfa711f11a8d65368dc51ec8f7c8241ba", "status": "affected", "versionType": "git"}, {"version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56", "lessThan": "60c4b9fe1a3dd012014b1f561a6928a0b5db1126", "status": "affected", "versionType": "git"}, {"version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56", "lessThan": "83e039f0a43e0708515b0479cb7690fb93faaaa0", "status": "affected", "versionType": "git"}, {"version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56", "lessThan": "97a9cf2a8217ca1cdaf48cb9ab26e471632c7e7f", "status": "affected", "versionType": "git"}, {"version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56", "lessThan": "dd47b8c4a0a8ced442da3f008db28fbbd31feaf0", "status": "affected", "versionType": "git"}, {"version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56", "lessThan": "43cae21424ff8e33894a0f86c6b80b840c049fd7", "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/7896d87cbb05e097efc113243d4e38f9f8cea16c"}, {"url": "https://git.kernel.org/stable/c/9d5309500b4607b7198e19f0a3fa13eb864cd5fb"}, {"url": "https://git.kernel.org/stable/c/6098634cfa711f11a8d65368dc51ec8f7c8241ba"}, {"url": "https://git.kernel.org/stable/c/60c4b9fe1a3dd012014b1f561a6928a0b5db1126"}, {"url": "https://git.kernel.org/stable/c/83e039f0a43e0708515b0479cb7690fb93faaaa0"}, {"url": "https://git.kernel.org/stable/c/97a9cf2a8217ca1cdaf48cb9ab26e471632c7e7f"}, {"url": "https://git.kernel.org/stable/c/dd47b8c4a0a8ced442da3f008db28fbbd31feaf0"}, {"url": "https://git.kernel.org/stable/c/43cae21424ff8e33894a0f86c6b80b840c049fd7"}], "title": "hwmon: (pmbus/adm1266) bounce blackbox records through a protocol-sized buffer", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{}

{"bugzilla": {"description": "kernel: hwmon: (pmbus/adm1266) bounce blackbox records through a protocol-sized buffer", "id": "2502582", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502582"}, "csaw": false, "cwe": "CWE-120", "details": ["A flaw was found in the Linux kernel's pmbus/adm1266 driver, which is responsible for hardware monitoring. This vulnerability occurs because the driver does not properly handle data sizes when reading blackbox records from a device. A malicious or malformed device could send more data than expected, causing a buffer overflow. This could lead to memory corruption within the kernel, potentially allowing a local attacker to escalate privileges or cause a system crash (Denial of Service)."], "name": "CVE-2026-64085", "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": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "impact": "moderate", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64085\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64085\nhttps://lore.kernel.org/linux-cve-announce/2026071916-CVE-2026-64085-d28f@gregkh/T"]}

{}