CVE-2025-68352

Kernel memory corruption via oversized CH341 copy

Published Dec 24, 2025 · Updated Dec 24, 2025

Out-of-bounds memory access in the Linux CH341 SPI driver allows local users to corrupt kernel memory through crafted SPI transfers. ch341_transfer_one adds a one-byte command header to len, then copies len bytes from trans->tx_buf into ch341->tx_buf + 1, reading one byte past the source and potentially writing past the 32-byte destination. Reaching the flaw requires local low-privileged access and use of the CH341 USB-to-SPI driver; the documented bounds errors expose kernel confidentiality, integrity, and availability.

CVSS severity7.8
High
EPSS probability0.15%
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 memory access in the Linux CH341 SPI driver allows local users to corrupt kernel memory through crafted SPI transfers. ch341_transfer_one adds a one-byte command header to len, then copies len bytes from trans->tx_buf into ch341->tx_buf + 1, reading one byte past the source and potentially writing past the 32-byte destination. Reaching the flaw requires local low-privileged access and use of the CH341 USB-to-SPI driver; the documented bounds errors expose kernel confidentiality, integrity, and availability.

The record

CVE
CVE-2025-68352
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 2025Record 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=6.11
  2. Affected versionversion=8846739f52afa07e63395c80227dc544f54bd7b1 <545d1287e40a55242f6ab68bcc1ba3b74088b1bc
  3. Affected versionversion=8846739f52afa07e63395c80227dc544f54bd7b1 <81841da1f30f66a850cc8796d99ba330aad9d696
  4. Affected versionversion=8846739f52afa07e63395c80227dc544f54bd7b1 <cad6c0fd6f3c0e76a1f75df4bce3b08a13f08974
  5. Affected versionversion=8846739f52afa07e63395c80227dc544f54bd7b1 <ea1e43966cd03098fcd5f0d72e6c2901d45fa08d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=8846739f52afa07e63395c80227dc544f54bd7b1 <545d1287e40a55242f6ab68bcc1ba3b74088b1bc; version=8846739f52afa07e63395c80227dc544f54bd7b1 <81841da1f30f66a850cc8796d99ba330aad9d696; version=8846739f52afa07e63395c80227dc544f54bd7b1 <cad6c0fd6f3c0e76a1f75df4bce3b08a13f08974; version=8846739f52afa07e63395c80227dc544f54bd7b1 <ea1e43966cd03098fcd5f0d72e6c2901d45fa08d

Published CVSS scores

7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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

T1068Exploitation for Privilege Escalation

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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