CVE-2026-80685Hinoki check available

Kernel crash via nonexistent third folio page read

Published Aug 28, 2026 · Updated Aug 28, 2026

Out-of-bounds read in Linux 6.15 allows local users to crash the kernel during memory removal when an order-1 folio borders a vmemmap hole. snapshot_page() treats a two-page folio as though it had a third struct page and copies __page_2 from the adjacent, potentially unmapped section. Triggering requires administrative memory-hot-remove activity and specific folio placement; the observed consequence is a kernel oops on the page-isolation path.

CVSS severityUnavailable
Unscored
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Out-of-bounds read in Linux 6.15 allows local users to crash the kernel during memory removal when an order-1 folio borders a vmemmap hole. snapshot_page() treats a two-page folio as though it had a third struct page and copies __page_2 from the adjacent, potentially unmapped section. Triggering requires administrative memory-hot-remove activity and specific folio placement; the observed consequence is a kernel oops on the page-isolation path.

The record

CVE
CVE-2026-80685
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=31a31da8a6187f1e5448ec73222e01d7d3fed4aa <7441d6348c70738e9ed307510db171c7a9b3f4bf
  2. Affected versionversion=31a31da8a6187f1e5448ec73222e01d7d3fed4aa <9668ffe0e2a5e2399dce281620198a2e415871fc
  3. Affected versionversion=31a31da8a6187f1e5448ec73222e01d7d3fed4aa <c649324571206a30949765320b91ccdb4c1722dc
  4. Affected versionversion=6.15

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=31a31da8a6187f1e5448ec73222e01d7d3fed4aa <7441d6348c70738e9ed307510db171c7a9b3f4bf; version=31a31da8a6187f1e5448ec73222e01d7d3fed4aa <9668ffe0e2a5e2399dce281620198a2e415871fc; version=31a31da8a6187f1e5448ec73222e01d7d3fed4aa <c649324571206a30949765320b91ccdb4c1722dc; version=6.15

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

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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