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CVE-2026-46001 (GCVE-0-2026-46001)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:55 – Updated: 2026-06-14 17:47
VLAI
Title
hwmon: (pt5161l) Fix bugs in pt5161l_read_block_data()
Summary
In the Linux kernel, the following vulnerability has been resolved: hwmon: (pt5161l) Fix bugs in pt5161l_read_block_data() Fix two bugs in pt5161l_read_block_data(): 1. Buffer overrun: The local buffer rbuf is declared as u8 rbuf[24], but i2c_smbus_read_block_data() can return up to I2C_SMBUS_BLOCK_MAX (32) bytes. The i2c-core copies the data into the caller's buffer before the return value can be checked, so the post-read length validation does not prevent a stack overrun if a device returns more than 24 bytes. Resize the buffer to I2C_SMBUS_BLOCK_MAX. 2. Unexpected positive return on length mismatch: When all three retries are exhausted because the device returns data with an unexpected length, i2c_smbus_read_block_data() returns a positive byte count. The function returns this directly, and callers treat any non-negative return as success, processing stale or incomplete buffer contents. Return -EIO when retries are exhausted with a positive return value, preserving the negative error code on I2C failure.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 , < 7eccabff1c9ec15e4b6fe186d5c147b13a9cdb4e (git)
Affected: 1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 , < 95d48e37a1304d6148406c799479c0fb505aefa7 (git)
Affected: 1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 , < a11aa9c5fd9dfe62be7cfec1f2a7546afb77254c (git)
Affected: 1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 , < 24c73e93d6a756e1b8626bb259d2e07c5b89b370 (git)
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Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.12.86 , ≤ 6.12.* (semver)
Unaffected: 6.18.27 , ≤ 6.18.* (semver)
Unaffected: 7.0.4 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T06:44:36+00:00",
      "cve": "CVE-2026-46001",
      "id": "CVE-2026-46001",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: hwmon: (pt5161l) Fix bugs in pt5161l_read_block_data()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46001.json",
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      "cve": "CVE-2026-46001",
      "id": "CVE-2026-46001",
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      "title": "SUSE CVE CVE-2026-46001",
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}