{"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"}}}}