CVE-2025-38398

Kernel memory corruption via undersized BAM arrays

Published Jul 25, 2025 · Updated Aug 5, 2026

Out-of-bounds access in the Linux QPIC SPI-NAND driver 6.15 through 6.15.5 allows local users to corrupt kernel memory via flash I/O. The qcom_nandc_alloc() probe path sizes BAM transaction arrays for one codeword before the NAND page size is known, then later flash operations index beyond those allocations when a page requires more transactions. Reachability requires affected Qualcomm QPIC SPI-NAND hardware and local access capable of NAND-backed file or MTD I/O; observed outcomes include kernel panics after reboot.

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

Out-of-bounds access in the Linux QPIC SPI-NAND driver 6.15 through 6.15.5 allows local users to corrupt kernel memory via flash I/O. The qcom_nandc_alloc() probe path sizes BAM transaction arrays for one codeword before the NAND page size is known, then later flash operations index beyond those allocations when a page requires more transactions. Reachability requires affected Qualcomm QPIC SPI-NAND hardware and local access capable of NAND-backed file or MTD I/O; observed outcomes include kernel panics after reboot.

The record

CVE
CVE-2025-38398
Published
Jul 25, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=6.15
  2. Affected versionversion=7304d1909080ef0c9da703500a97f46c98393fcd <86fb36de1132b560f9305f0c78fa69f459fa0980
  3. Affected versionversion=7304d1909080ef0c9da703500a97f46c98393fcd <d85d0380292a7e618915069c3579ae23c7c80339

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.15; version=7304d1909080ef0c9da703500a97f46c98393fcd <86fb36de1132b560f9305f0c78fa69f459fa0980; version=7304d1909080ef0c9da703500a97f46c98393fcd <d85d0380292a7e618915069c3579ae23c7c80339

Published CVSS scores

7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NISTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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 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

CWE-476NULL Pointer Dereference
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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