CVE-2025-37840

Kernel warning via uninitialized NAND operation

Published May 9, 2025 · Updated May 11, 2026

Use of an uninitialized resource in Linux's Broadcom raw NAND driver allows local users to trigger a kernel warning during PM resume. The brcmnand_resume path calls nand_reset_op with an uninitialized nand_operation, so its chip-select check reads an indeterminate cs field. Reaching the path requires CAP_SYS_ADMIN in the initial user namespace and compatible single-die Broadcom STB NAND hardware; the public record demonstrates a warning and kernel taint, not a crash or data corruption.

CVSS severity7.8
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of an uninitialized resource in Linux's Broadcom raw NAND driver allows local users to trigger a kernel warning during PM resume. The brcmnand_resume path calls nand_reset_op with an uninitialized nand_operation, so its chip-select check reads an indeterminate cs field. Reaching the path requires CAP_SYS_ADMIN in the initial user namespace and compatible single-die Broadcom STB NAND hardware; the public record demonstrates a warning and kernel taint, not a crash or data corruption.

The record

CVE
CVE-2025-37840
Published
May 9, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. May 9, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.16
  2. Affected versionversion=97d90da8a886949f09bb4754843fb0b504956ad2 <659b1f29f3e2fd5d751fdf35c5526d1f1c9b3dd2
  3. Affected versionversion=97d90da8a886949f09bb4754843fb0b504956ad2 <6f567c6a5250e3531cfd9c7ff254ecc2650464fa
  4. Affected versionversion=97d90da8a886949f09bb4754843fb0b504956ad2 <7266066b9469f04ed1d4c0fdddaea1425835eb55
  5. Affected versionversion=97d90da8a886949f09bb4754843fb0b504956ad2 <8775581e1c48e1bdd04a893d6f6bbe5128ad0ea7
  6. Affected versionversion=97d90da8a886949f09bb4754843fb0b504956ad2 <9bd51723ab51580e077c91d494c37e80703b8524
  7. Affected versionversion=97d90da8a886949f09bb4754843fb0b504956ad2 <9dd161f707ecb7db38e5f529e979a5b6eb565b2d
  8. Affected versionversion=97d90da8a886949f09bb4754843fb0b504956ad2 <c2eb3cffb0d972c5503e4d48921971c81def0fe5
  9. Affected versionversion=97d90da8a886949f09bb4754843fb0b504956ad2 <ddc210cf8b8a8be68051ad958bf3e2cef6b681c2
  10. Affected versionversion=97d90da8a886949f09bb4754843fb0b504956ad2 <fbcb584efa5cd912ff8a151d67b8fe22f4162a85

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4.16; version=97d90da8a886949f09bb4754843fb0b504956ad2 <659b1f29f3e2fd5d751fdf35c5526d1f1c9b3dd2; version=97d90da8a886949f09bb4754843fb0b504956ad2 <6f567c6a5250e3531cfd9c7ff254ecc2650464fa; version=97d90da8a886949f09bb4754843fb0b504956ad2 <7266066b9469f04ed1d4c0fdddaea1425835eb55; version=97d90da8a886949f09bb4754843fb0b504956ad2 <8775581e1c48e1bdd04a893d6f6bbe5128ad0ea7; version=97d90da8a886949f09bb4754843fb0b504956ad2 <9bd51723ab51580e077c91d494c37e80703b8524; version=97d90da8a886949f09bb4754843fb0b504956ad2 <9dd161f707ecb7db38e5f529e979a5b6eb565b2d; version=97d90da8a886949f09bb4754843fb0b504956ad2 <c2eb3cffb0d972c5503e4d48921971c81def0fe5; version=97d90da8a886949f09bb4754843fb0b504956ad2 <ddc210cf8b8a8be68051ad958bf3e2cef6b681c2; version=97d90da8a886949f09bb4754843fb0b504956ad2 <fbcb584efa5cd912ff8a151d67b8fe22f4162a85

Published CVSS scores

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

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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