CVE-2025-40356

Memory disclosure and corruption via invalid DMA mapping

Published Dec 16, 2025 · Updated Dec 16, 2025

Memory corruption in the Rockchip SFC driver in Linux 6.14 through 6.17.5 allows local users to read or corrupt kernel memory via flash I/O. rockchip_sfc_probe() derives a DMA address with virt_to_phys() instead of mapping its transfer buffer through dma_map_single(), so later synchronization and transfers operate on an address the DMA layer never allocated or translated. An affected Rockchip board with the SFC driver and SPI-NOR storage is required; ordinary local flash reads can expose stale kernel data, corrupt unrelated memory, or panic the system.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the Rockchip SFC driver in Linux 6.14 through 6.17.5 allows local users to read or corrupt kernel memory via flash I/O. rockchip_sfc_probe() derives a DMA address with virt_to_phys() instead of mapping its transfer buffer through dma_map_single(), so later synchronization and transfers operate on an address the DMA layer never allocated or translated. An affected Rockchip board with the SFC driver and SPI-NOR storage is required; ordinary local flash reads can expose stale kernel data, corrupt unrelated memory, or panic the system.

The record

CVE
CVE-2025-40356
Published
Dec 16, 2025
Updated
Dec 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 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=6.14
  2. Affected versionversion=b69386fcbc6066fb4885667743ab4d4967d561b8 <22810d4cb0e8a7d51b24527e73beac60afc1c693
  3. Affected versionversion=b69386fcbc6066fb4885667743ab4d4967d561b8 <ee795e82e10197c070efd380dc9615c73dffad6c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.14; version=b69386fcbc6066fb4885667743ab4d4967d561b8 <22810d4cb0e8a7d51b24527e73beac60afc1c693; version=b69386fcbc6066fb4885667743ab4d4967d561b8 <ee795e82e10197c070efd380dc9615c73dffad6c

Published CVSS scores

7.8Linux Kernel CVE teamCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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