CVE-2026-46001
📛 CVE Title
hwmon: (pt5161l) Fix bugs in pt5161l_read_block_data()
Description
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.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- Linux
- CVSS severity
- high
- CVSS score
- 7.1 / 10
- CVSS vector
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H- Effective score
- 7.1 / 10 HIGH source: CNA overview
- CWE(s)
- —
- Reserved
- 2026-05-13
- Published
- 2026-05-27 12:55 UTC
- Last updated
- 2026-05-27 12:55 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/46xxx/CVE-2026-46001.json
- Linked Threat
- CVE-2026-46001 — CVE-2026-46001
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-27 14:17:17 UTC
- NVD last modified
- 2026-06-17 10:52:52 UTC
- NVD CVSS v3.1
- 7.8 / 10 HIGH source: nvd@nist.gov
- NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Exploitability subscore
- 1.8 / 10
- Impact subscore
- 5.9 / 10
- EPSS score
- 0.0013 (probability of exploitation in next 30 days)
- EPSS percentile
- 2.89% vs all CVEs — higher = more likely to be exploited, as of 2026-07-16
NVD-assigned CWE(s):
CWE-787
(differs from the CNA list above)
NVD / KEV / EPSS data refreshed 2026-07-17 00:22 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-32297 - Assigner
- Linux
- Published
- May 27, 2026, 12:55:56 PM
- Updated
- Jun 14, 2026, 5:47:16 PM
- EUVD base score
- 0.0 / 10
- EUVD-reported EPSS
- 0.1300
- Vendors
- Linux
- Products
-
Linux (patch: 6.18.27)Linux (patch: 0)Linux (patch: 6.12.86)Linux (6.9)Linux (1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 <7eccabff1c9ec15e4b6fe186d5c147b13a9cdb4e)Linux (1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 <95d48e37a1304d6148406c799479c0fb505aefa7)Linux (1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 <a11aa9c5fd9dfe62be7cfec1f2a7546afb77254c)Linux (1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 <24c73e93d6a756e1b8626bb259d2e07c5b89b370)Linux (patch: 7.1-rc1)Linux (patch: 7.1)Linux (patch: 7.0.4)
- Aliases
-
GHSA-j98c-q2pf-9m22
ENISA description: 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.
EUVD references (4)
Affected products (2)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Linux | Linux |
1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 (affected),
1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 (affected),
1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 (affected),
1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4 (affected)
|
— |
| Linux | Linux |
6.9 (affected),
0 (unaffected),
6.12.86 (unaffected),
6.18.27 (unaffected),
7.0.4 (unaffected),
7.1-rc1 (unaffected)
|
— |
Affected products — CPE 2.3 (1) NVD
NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendor references (4)
References embedded in the original CVE record by the assigning CNA.
Web references (7)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://git.kernel.org/stable/c/24c73e93d6a756e1b8626bb259d2e07c5b89b370 tenable:git.kernel.org
- https://git.kernel.org/stable/c/7eccabff1c9ec15e4b6fe186d5c147b13a9cdb4e tenable:git.kernel.org
- https://git.kernel.org/stable/c/95d48e37a1304d6148406c799479c0fb505aefa7 tenable:git.kernel.org
- https://git.kernel.org/stable/c/a11aa9c5fd9dfe62be7cfec1f2a7546afb77254c tenable:git.kernel.org
- https://nvd.nist.gov/vuln/detail/CVE-2026-46001 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-46001 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
NVD-tagged references (4)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://git.kernel.org/stable/c/24c73e93d6a756e1b8626bb259d2e07c5b89b370 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
- https://git.kernel.org/stable/c/7eccabff1c9ec15e4b6fe186d5c147b13a9cdb4e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
- https://git.kernel.org/stable/c/95d48e37a1304d6148406c799479c0fb505aefa7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
- https://git.kernel.org/stable/c/a11aa9c5fd9dfe62be7cfec1f2a7546afb77254c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Patch
Remediations (18)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:blog.qualys.com
May 2026's Patch Tuesday arrives with Microsoft addressing a fresh set of vulnerabilities across its ecosystem, reinforcing the ongoing need for timely patching in an increasingly threat-heavy…
2026-06-04 00:11 UTC -
web:cybersecuritynews.com
Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.
2026-06-04 00:11 UTC -
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-06-04 00:11 UTC -
web:support.esri.com
The C version of this patch also includes additional bug fixes not related to security, refer to the updated Issues Addressed with this Patch section for the latest details. April 20, 2026 : The 11.4 version of the Portal for ArcGIS Security 2026 Update 1 Patch is now available.
2026-06-04 00:11 UTC -
web:www.cisecurity.org
<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...
2026-06-04 00:11 UTC -
web:www.crowdstrike.com
Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.
2026-06-04 00:11 UTC -
web:www.lansweeper.com
Which vulnerabilities, issues, and other things did Microsoft update? Discover what's new using Lansweeper's Patch Tuesday May 2026 summary.
2026-06-04 00:11 UTC -
web:www.oracle.com
This Critical Security Patch Update contains 35 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Security Patch Update and other Oracle Software Security Assurance activities is located at May 2026 Critical Security Patch Update: Executive Summary and Analysis.
2026-06-04 00:11 UTC -
web:www.windowslatest.com
Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.
2026-06-04 00:11 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's June 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-06-04 00:11 UTC -
web:cybersecuritynews.com
Microsoft has officially acknowledged a critical zero-day vulnerability in Microsoft Defender, publicly dubbed "RoguePlanet," and confirmed it is actively developing a security patch to address the flaw.
2026-06-19 02:27 UTC -
web:msrc.microsoft.com
Security Update Guide - Microsoft Security Response Center
2026-06-19 02:27 UTC -
web:support.microsoft.com
Improvements This update includes new features and quality improvements that were part of the following update: May 12, 2026—KB5089549 (OS Builds 26200.8457 and 26100.8457) May 26, 2026—KB5089573 (OS Builds 26200.8524 and 26100.8524) This update addresses security vulnerabilities documented in the following guide: June 2026 Security Updates. The following summary outlines key quality ...
2026-06-19 02:27 UTC -
web:www.bleepingcomputer.com
Today is Microsoft's February 2026 Patch Tuesday with security updates for 58 flaws, including 6 actively exploited and three publicly disclosed zero-day vulnerabilities.
2026-06-19 02:27 UTC -
web:www.csoonline.com
Microsoft highlighted six new and actively exploited vulnerabilities among the 60 fixes issued in today's February Patch Tuesday releases.
2026-06-19 02:27 UTC -
web:www.malwarebytes.com
Microsoft says it's working on a fix for an unpatched Defender vulnerability that can give attackers the highest level of access on Windows.
2026-06-19 02:27 UTC -
web:www.rapid7.com
Microsoft is publishing 200 vulnerabilities on June 2026 Patch Tuesday, including an HTTP/2 denial of service vulnerability and an elevation of privilege vulnerability in PowerToys.
2026-06-19 02:27 UTC -
web:www.veeam.com
When a vulnerability is identified, our team promptly develops a patch to address and mitigate the risk. In line with our dedication to transparency, we publicly disclose the vulnerability and provide detailed mitigation information.
2026-06-19 02:27 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-46001.json.
{
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"cna": {
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{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/hwmon/pt5161l.c"
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{
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{
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{
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},
{
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"status": "unaffected",
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},
{
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"version": "7.0.4",
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},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.1-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
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"value": "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."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-27T12:55:56.128Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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},
{
"url": "https://git.kernel.org/stable/c/95d48e37a1304d6148406c799479c0fb505aefa7"
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{
"url": "https://git.kernel.org/stable/c/a11aa9c5fd9dfe62be7cfec1f2a7546afb77254c"
},
{
"url": "https://git.kernel.org/stable/c/24c73e93d6a756e1b8626bb259d2e07c5b89b370"
}
],
"title": "hwmon: (pt5161l) Fix bugs in pt5161l_read_block_data()",
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"cveId": "CVE-2026-46001",
"datePublished": "2026-05-27T12:55:56.128Z",
"dateReserved": "2026-05-13T15:03:33.091Z",
"dateUpdated": "2026-05-27T12:55:56.128Z",
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