CVE-2026-80946

Kernel panic via direct slab header usercopy

Published Sep 11, 2026 · Updated Sep 11, 2026

Denial of service in Linux 6.14 allows local users to panic the kernel through FUSE requests transported over io_uring. The FUSE io_uring path copies request headers directly between userspace and a fuse_request slab object whose cache has no usercopy whitelist. Reachability requires the FUSE io_uring transport and CONFIG_HARDENED_USERCOPY; a qualifying header copy aborts usercopy validation and crashes the host.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux 6.14 allows local users to panic the kernel through FUSE requests transported over io_uring. The FUSE io_uring path copies request headers directly between userspace and a fuse_request slab object whose cache has no usercopy whitelist. Reachability requires the FUSE io_uring transport and CONFIG_HARDENED_USERCOPY; a qualifying header copy aborts usercopy validation and crashes the host.

The record

CVE
CVE-2026-80946
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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=6.14
  2. Affected versionversion=c090c8abae4b6b77a1bee116aa6c385456ebef96 <194d0fb0ea4720535ff3168c9d04c7632cec7071
  3. Affected versionversion=c090c8abae4b6b77a1bee116aa6c385456ebef96 <a47a416ff68d706dc3327ab583f86b9ee757358b
  4. Affected versionversion=c090c8abae4b6b77a1bee116aa6c385456ebef96 <fd10f40af314f07b6d6e028b1ca25c8b49903aab

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.14; version=c090c8abae4b6b77a1bee116aa6c385456ebef96 <194d0fb0ea4720535ff3168c9d04c7632cec7071; version=c090c8abae4b6b77a1bee116aa6c385456ebef96 <a47a416ff68d706dc3327ab583f86b9ee757358b; version=c090c8abae4b6b77a1bee116aa6c385456ebef96 <fd10f40af314f07b6d6e028b1ca25c8b49903aab

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.

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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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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