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NVD / CVE Program· CNA Linux

CVE-2025-38401: mtk-sd: Prevent memory corruption from DMA map failure

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.20% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 3419bc6a7b65cbbb91417bb9970208478e034c79, 48bf4f3dfcdab02b22581d8e350a2d23130b72c0, 5ac9e9e2e9cd6247d8c2d99780eae4556049e1cc; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1.

Low priority for now. Upgrade to Linux Linux 3419bc6a7b65cbbb91417bb9970208478e034c79, 48bf4f3dfcdab02b22581d8e350a2d23130b72c0, 5ac9e9e2e9cd6247d8c2d99780eae4556049e1cc; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: mtk-sd: Prevent memory corruption from DMA map failure If msdc_prepare_data() fails to map the DMA region, the request is not prepared for data receiving, but msdc_start_data() proceeds the DMA with previous setting. Since this will lead a memory corruption, we have to stop the request operation soon after the msdc_prepare_data() fails to prepare it.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Jul 25, 2025
Updated
Aug 5, 2026
EPSS
0.2% · 10th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CNA vs NVD score

NVD
7.8
CNA · Linux
7.8
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-38401

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux11.0
  • linux linux kernel5.5 and later · before 5.10.240
  • linux linux kernel5.11 and later · before 5.15.187
  • linux linux kernel5.16 and later · before 6.1.144
  • linux linux kernel4.2 and later · before 5.4.296
  • linux linux kernel6.7 and later · before 6.12.37
  • linux linux kernel6.13 and later · before 6.15.6
  • linux linux kernel6.2 and later · before 6.6.97
  • linux linux kernel6.16

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.2affected
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before 5ac9e9e2e9cd6247d8c2d99780eae4556049e1ccaffected · git
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before d54771571f74a82c59830a32e76af78a8e57ac69affected · git
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before 48bf4f3dfcdab02b22581d8e350a2d23130b72c0affected · git
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before 63e8953f16acdcb23e2d4dd8a566d3c34df3e200affected · git
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before 61cdd663564674ea21ceb50aa9d3697cbe9e45f9affected · git
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before 3419bc6a7b65cbbb91417bb9970208478e034c79affected · git
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before a5f5f67b284d81776d4a3eb1f8607e4b7f91f11caffected · git
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before f5de469990f19569627ea0dd56536ff5a13beaa3affected · git
    • before 4.2not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.147-16.1.147-1
Debian:13linuxbefore 6.12.37-16.12.37-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-38397Jul 25, 2025 · nvme-multipath: fix suspicious RCU usage warning
    22Monitor
  • ← EarlierCVE-2025-38398Jul 25, 2025 · spi: spi-qpic-snand: reallocate BAM transactions
    22Monitor
  • Later →CVE-2025-38403Jul 25, 2025 · vsock/vmci: Clear the vmci transport packet properly when initializing it
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux3419bc6a7b65cbbb91417bb9970208478e034c79Vendor (CNA)
Linux Linux48bf4f3dfcdab02b22581d8e350a2d23130b72c0Vendor (CNA)
Linux Linux5ac9e9e2e9cd6247d8c2d99780eae4556049e1ccVendor (CNA)
Linux Linux61cdd663564674ea21ceb50aa9d3697cbe9e45f9Vendor (CNA)
Linux Linux63e8953f16acdcb23e2d4dd8a566d3c34df3e200Vendor (CNA)
Linux Linuxa5f5f67b284d81776d4a3eb1f8607e4b7f91f11cVendor (CNA)
Linux Linuxd54771571f74a82c59830a32e76af78a8e57ac69Vendor (CNA)
Linux Linuxf5de469990f19569627ea0dd56536ff5a13beaa3Vendor (CNA)
azl3 kernel 6.6.96.2-2 on Azure Linux 3.06.6.104.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.05.15.200.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.147-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (9 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records