CVE-2026-92504

Kernel memory disclosure via leftover ODVP sysfs files

Published Sep 17, 2026 · Updated Sep 18, 2026

Use-after-free in Linux 5.8 and later allows local users to disclose or corrupt kernel memory by reading leftover ODVP sysfs files. The int3400 probe unwind leaves ODVP files and storage referencing freed private data when a failure occurs after evaluate_odvp(), while cleanup_odvp() also retains dangling cached pointers. Exploitation requires a rare INT3400 probe-resource failure that attackers cannot force; subsequent ODVP access can disclose or overwrite kernel memory, double-free storage, or panic the host.

CVSS severity7.0
High
EPSS probability0.15%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux 5.8 and later allows local users to disclose or corrupt kernel memory by reading leftover ODVP sysfs files. The int3400 probe unwind leaves ODVP files and storage referencing freed private data when a failure occurs after evaluate_odvp(), while cleanup_odvp() also retains dangling cached pointers. Exploitation requires a rare INT3400 probe-resource failure that attackers cannot force; subsequent ODVP access can disclose or overwrite kernel memory, double-free storage, or panic the host.

The record

CVE
CVE-2026-92504
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 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=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <08df725b927512fa9672b146a00766da478b6c2e
  2. Affected versionversion=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <169772cd2147c517be5cfda2710d17f8c90d6f10
  3. Affected versionversion=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <5798c714fccf1b4939a98a812b9073da365172c8
  4. Affected versionversion=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <ad13e550ce51c66560bafd315eb5d09f2ee7c4ce
  5. Affected versionversion=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <bc0e96267a6715fcc4b81cf980034a5e65703780
  6. Affected versionversion=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <bfd6df12ce6781e4bf1c7177dab42a8780177960
  7. Affected versionversion=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <d7b025d3fdf3cf8b726ce1d13f434f57477972bb
  8. Affected versionversion=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <d83dc9ce57a746a6dca28439bcc0575d26fa6986
  9. Affected versionversion=5.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <08df725b927512fa9672b146a00766da478b6c2e; version=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <169772cd2147c517be5cfda2710d17f8c90d6f10; version=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <5798c714fccf1b4939a98a812b9073da365172c8; version=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <ad13e550ce51c66560bafd315eb5d09f2ee7c4ce; version=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <bc0e96267a6715fcc4b81cf980034a5e65703780; version=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <bfd6df12ce6781e4bf1c7177dab42a8780177960; version=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <d7b025d3fdf3cf8b726ce1d13f434f57477972bb; version=006f006f1e5c48e5ddd6515eab2c9a7b27ce1144 <d83dc9ce57a746a6dca28439bcc0575d26fa6986; version=5.8

Published CVSS scores

7.0Linux CNACVSS:3.1/AV:L/AC:H/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.

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)
Vectorlocal
Privilegesauthenticated
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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