CVE-2026-98834Hinoki check available

Memory corruption via repeated OTP device unregistration

Published Oct 18, 2026 · Updated Oct 18, 2026

Double-free in Linux MTD OTP setup allows attackers to cause memory corruption when factory OTP registration fails after user OTP setup. In mtd_otp_nvmem_add(), error cleanup unregisters the user OTP NVMEM device without clearing mtd->otp_user_nvmem, so caller cleanup or normal teardown unregisters it again. The path requires MTD OTP support and a factory OTP setup failure; the published report does not establish attacker control or a specific crash outcome.

CVSS severityUnavailable
Unscored
EPSS probability0.15%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Double-free in Linux MTD OTP setup allows attackers to cause memory corruption when factory OTP registration fails after user OTP setup. In mtd_otp_nvmem_add(), error cleanup unregisters the user OTP NVMEM device without clearing mtd->otp_user_nvmem, so caller cleanup or normal teardown unregisters it again. The path requires MTD OTP support and a factory OTP setup failure; the published report does not establish attacker control or a specific crash outcome.

The record

CVE
CVE-2026-98834
Published
Oct 18, 2026
Updated
Oct 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 18, 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=5.15.111 <5.16
  2. Affected versionversion=6.1.28 <6.2
  3. Affected versionversion=6.2.15 <6.3
  4. Affected versionversion=6.3.2 <6.4
  5. Affected versionversion=6.4
  6. Affected versionversion=6d1af517817a760d7af3dee0fc4603645485495c
  7. Affected versionversion=949476b8601bde5459048eebdf457c9db20addd8
  8. Affected versionversion=dd6c85f98ff33b009b819090268cbf679dc208b9
  9. Affected versionversion=e0489f6e221f5ddee6cb3bd51b992b790c5fa4b9 <26300879cd8e4612dce66bb8f6ff7cd35fcf3e59
  10. Affected versionversion=e0489f6e221f5ddee6cb3bd51b992b790c5fa4b9 <cecf007418b93a2cbc94269e07fe2fb28f54d8fb
  11. Affected versionversion=f1b4affca1e13706ca2eb075bf6775421236d7d1

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.15.111 <5.16; version=6.1.28 <6.2; version=6.2.15 <6.3; version=6.3.2 <6.4; version=6.4; version=6d1af517817a760d7af3dee0fc4603645485495c; version=949476b8601bde5459048eebdf457c9db20addd8; version=dd6c85f98ff33b009b819090268cbf679dc208b9; version=e0489f6e221f5ddee6cb3bd51b992b790c5fa4b9 <26300879cd8e4612dce66bb8f6ff7cd35fcf3e59; version=e0489f6e221f5ddee6cb3bd51b992b790c5fa4b9 <cecf007418b93a2cbc94269e07fe2fb28f54d8fb; version=f1b4affca1e13706ca2eb075bf6775421236d7d1

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
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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