CVE-2026-43005

Local disclosure and crash via buffer under-read

Published May 1, 2026 · Updated May 1, 2026

Out-of-bounds read in the Linux Kernel tps53679 hwmon driver 6.17 allows local users to disclose stack data or crash the system. tps53679_identify_chip() accepts a zero return from i2c_smbus_read_block_data() and indexes buf[ret - 1], reading buf[-1] before the stack buffer. Exploitation requires low-privileged local access and a TPS53679 device response producing a zero-length SMBus block read; integrity is unaffected.

CVSS severity7.1
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the Linux Kernel tps53679 hwmon driver 6.17 allows local users to disclose stack data or crash the system. tps53679_identify_chip() accepts a zero return from i2c_smbus_read_block_data() and indexes buf[ret - 1], reading buf[-1] before the stack buffer. Exploitation requires low-privileged local access and a TPS53679 device response producing a zero-length SMBus block read; integrity is unaffected.

The record

CVE
CVE-2026-43005
Published
May 1, 2026
Updated
May 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-125, CAPEC-540, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2026CVE publishedPublication date reported by the CVE source.
  2. May 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.17
  2. Affected versionversion=75ca1e5875fe3f0b9d0e8615c69f49bc2c7fb65d <0e211f6aaa6a00fd0ee0c1eea5498f168c6725e6
  3. Affected versionversion=75ca1e5875fe3f0b9d0e8615c69f49bc2c7fb65d <6999b4769e2a61c463158927102e8c07e3f69ba2
  4. Affected versionversion=75ca1e5875fe3f0b9d0e8615c69f49bc2c7fb65d <79b7e588399bb55f4c10bea6ca41b6c3b944d2bb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.17; version=75ca1e5875fe3f0b9d0e8615c69f49bc2c7fb65d <0e211f6aaa6a00fd0ee0c1eea5498f168c6725e6; version=75ca1e5875fe3f0b9d0e8615c69f49bc2c7fb65d <6999b4769e2a61c463158927102e8c07e3f69ba2; version=75ca1e5875fe3f0b9d0e8615c69f49bc2c7fb65d <79b7e588399bb55f4c10bea6ca41b6c3b944d2bb

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.1UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CAPEC-540Overread Buffers
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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