{"id":"CVE-2026-46001","summary":"hwmon: (pt5161l) Fix bugs in pt5161l_read_block_data()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pt5161l) Fix bugs in pt5161l_read_block_data()\n\nFix two bugs in pt5161l_read_block_data():\n\n1. Buffer overrun: The local buffer rbuf is declared as u8 rbuf[24],\n   but i2c_smbus_read_block_data() can return up to\n   I2C_SMBUS_BLOCK_MAX (32) bytes. The i2c-core copies the data into\n   the caller's buffer before the return value can be checked, so\n   the post-read length validation does not prevent a stack overrun\n   if a device returns more than 24 bytes. Resize the buffer to\n   I2C_SMBUS_BLOCK_MAX.\n\n2. Unexpected positive return on length mismatch: When all three\n   retries are exhausted because the device returns data with an\n   unexpected length, i2c_smbus_read_block_data() returns a positive\n   byte count. The function returns this directly, and callers treat\n   any non-negative return as success, processing stale or incomplete\n   buffer contents. Return -EIO when retries are exhausted with a\n   positive return value, preserving the negative error code on I2C\n   failure.","modified":"2026-06-18T03:56:32.539087190Z","published":"2026-05-27T12:55:56.128Z","related":["openSUSE-SU-2026:10954-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46001.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/24c73e93d6a756e1b8626bb259d2e07c5b89b370"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7eccabff1c9ec15e4b6fe186d5c147b13a9cdb4e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/95d48e37a1304d6148406c799479c0fb505aefa7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a11aa9c5fd9dfe62be7cfec1f2a7546afb77254c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46001.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46001"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4"},{"fixed":"7eccabff1c9ec15e4b6fe186d5c147b13a9cdb4e"},{"fixed":"95d48e37a1304d6148406c799479c0fb505aefa7"},{"fixed":"a11aa9c5fd9dfe62be7cfec1f2a7546afb77254c"},{"fixed":"24c73e93d6a756e1b8626bb259d2e07c5b89b370"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-46001.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.9.0"},{"fixed":"6.12.86"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.27"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-46001.json"}}],"schema_version":"1.7.5"}