CVE-2024-0582Public exploit

Local privilege escalation via mapped buffer-ring reuse

Published Jan 16, 2024 · Updated Nov 20, 2025

Use-after-free in Linux Kernel 6.4 through 6.6.4 allows local users to escalate privileges or crash the system through io_uring. The io_uring/kbuf unregister path frees a provided buffer ring while its VM_PFNMAP mapping still exposes those pages to user space. A low-privileged local account must register, map, and unregister the ring; the dangling mapping permits reuse of freed kernel pages.

CVSS severity7.8
High
EPSS probability12.84%
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 Linux Kernel 6.4 through 6.6.4 allows local users to escalate privileges or crash the system through io_uring. The io_uring/kbuf unregister path frees a provided buffer ring while its VM_PFNMAP mapping still exposes those pages to user space. A low-privileged local account must register, map, and unregister the ring; the dangling mapping permits reuse of freed kernel pages.

The record

CVE
CVE-2024-0582
Published
Jan 16, 2024
Updated
Nov 20, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 20, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux KernelAffected versions are unavailable in this record.

Published CVSS scores

7.8Red Hat, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.

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

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

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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