{"cve":"CVE-2026-46001","nvd":{"published":"2026-05-27T14:17:17.760","modified":"2026-06-17T10:52:52.667","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-787"],"references":["https://git.kernel.org/stable/c/24c73e93d6a756e1b8626bb259d2e07c5b89b370","https://git.kernel.org/stable/c/7eccabff1c9ec15e4b6fe186d5c147b13a9cdb4e","https://git.kernel.org/stable/c/95d48e37a1304d6148406c799479c0fb505aefa7","https://git.kernel.org/stable/c/a11aa9c5fd9dfe62be7cfec1f2a7546afb77254c"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-46001","score":0.00129,"percentile":0.02479,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}