CVE-2026-46285

Freed kernel memory access via stale docg3 dereference

Published Jun 8, 2026 · Updated Jun 8, 2026

Use-after-free in the docg3 MTD driver in Linux Kernel releases starting at 5.8 allows local users to access freed kernel memory. In docg3_release(), doc_release_device() frees the cached docg3 structure inside the floor-removal loop before docg3->cascade->bch reads through that stale pointer. Reachability requires CAP_SYS_ADMIN to unbind the platform device through sysfs or CAP_SYS_MODULE to unload the driver, and published sources establish no consequence beyond the freed-memory access.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the docg3 MTD driver in Linux Kernel releases starting at 5.8 allows local users to access freed kernel memory. In docg3_release(), doc_release_device() frees the cached docg3 structure inside the floor-removal loop before docg3->cascade->bch reads through that stale pointer. Reachability requires CAP_SYS_ADMIN to unbind the platform device through sysfs or CAP_SYS_MODULE to unload the driver, and published sources establish no consequence beyond the freed-memory access.

The record

CVE
CVE-2026-46285
Published
Jun 8, 2026
Updated
Jun 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 8, 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=5.8
  2. Affected versionversion=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <16f6588a3b7a2a20d10ad9b766be74c60ba347cc
  3. Affected versionversion=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <2bf706fe7831b319f23a85b9728f961cfed40c3e
  4. Affected versionversion=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <8408655ec8344511667b61d8257dc59c80ee3391
  5. Affected versionversion=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <ca19808bc6fac7e29420d8508df569b346b3e339
  6. Affected versionversion=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <d26f8c361f751c188b7ebaf8189aa0258968fd98
  7. Affected versionversion=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <d49628d63d4e6bbc8a1621afb88e5fc901611bee
  8. Affected versionversion=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <d89044889ecd11b0c2f86663597246e9bdd25679
  9. Affected versionversion=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <f5d2ed4ed47d3906e2495a3537a48b127f497a17

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.8; version=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <16f6588a3b7a2a20d10ad9b766be74c60ba347cc; version=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <2bf706fe7831b319f23a85b9728f961cfed40c3e; version=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <8408655ec8344511667b61d8257dc59c80ee3391; version=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <ca19808bc6fac7e29420d8508df569b346b3e339; version=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <d26f8c361f751c188b7ebaf8189aa0258968fd98; version=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <d49628d63d4e6bbc8a1621afb88e5fc901611bee; version=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <d89044889ecd11b0c2f86663597246e9bdd25679; version=c8ae3f744ddca0da164bcacee42d1d4b6fe7027d <f5d2ed4ed47d3906e2495a3537a48b127f497a17

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/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.

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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

CWE-416Use After Free

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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