CVE-2023-53860Public exploit

Local privilege escalation via dm table use-after-free

Published Dec 9, 2025 · Updated Aug 5, 2026

Use-after-free in the Linux kernel device mapper allows local users to execute code in kernel context through crafted REQ_NOWAIT I/O. The dm_submit_bio path performs a bio allocation that can sleep while an RCU-protected table remains in use, allowing the table to be freed and later dereferenced. An ordinary unprivileged account can reach the path with io_uring IOPOLL direct I/O over an LVM volume, leading to kernel compromise or a crash.

CVSS severity7.8
High
EPSS probability0.18%
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 Linux kernel device mapper allows local users to execute code in kernel context through crafted REQ_NOWAIT I/O. The dm_submit_bio path performs a bio allocation that can sleep while an RCU-protected table remains in use, allowing the table to be freed and later dereferenced. An ordinary unprivileged account can reach the path with io_uring IOPOLL direct I/O over an LVM volume, leading to kernel compromise or a crash.

The record

CVE
CVE-2023-53860
Published
Dec 9, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-663, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.19
  2. Affected versionversion=563a225c9fd207326c2a2af9d59b4097cb31ce70 <699775e9338adcd4eaedea000d32c60250c3114d
  3. Affected versionversion=563a225c9fd207326c2a2af9d59b4097cb31ce70 <a9ce385344f916cd1c36a33905e564f5581beae9
  4. Affected versionversion=563a225c9fd207326c2a2af9d59b4097cb31ce70 <d7b2abd87d1fcdb47811f90090a363e7ca15cb14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=563a225c9fd207326c2a2af9d59b4097cb31ce70 <699775e9338adcd4eaedea000d32c60250c3114d; version=563a225c9fd207326c2a2af9d59b4097cb31ce70 <a9ce385344f916cd1c36a33905e564f5581beae9; version=563a225c9fd207326c2a2af9d59b4097cb31ce70 <d7b2abd87d1fcdb47811f90090a363e7ca15cb14

Published CVSS scores

7.8Linux kernel CNACVSS: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 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-663Use of a Non-reentrant Function in a Concurrent Context
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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