CVE-2024-53148

Local privilege escalation via stale Comedi mappings

Published Dec 24, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux kernel Comedi mmap path allows local users to read or write reused kernel memory and escalate privileges. If remap_pfn_range partially succeeds, comedi_mmap drops the buffer reference before its VMA mappings are flushed, leaving writable page-table entries to freed pages. An attached Comedi driver and access to /dev/comediN are required; racing mmap failure with buffer release enables kernel-memory disclosure, corruption, panic, or root escalation.

CVSS severity7.8
High
EPSS probability0.25%
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 Comedi mmap path allows local users to read or write reused kernel memory and escalate privileges. If remap_pfn_range partially succeeds, comedi_mmap drops the buffer reference before its VMA mappings are flushed, leaving writable page-table entries to freed pages. An attached Comedi driver and access to /dev/comediN are required; racing mmap failure with buffer release enables kernel-memory disclosure, corruption, panic, or root escalation.

The record

CVE
CVE-2024-53148
Published
Dec 24, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2024CVE 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

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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=2.6.29
  2. Affected versionversion=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <16c507df509113c037cdc0ba642b9ab3389bd26c
  3. Affected versionversion=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <297f14fbb81895f4ccdb0ad25d196786d6461e00
  4. Affected versionversion=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <57f048c2d205b85e34282a9b0b0ae177e84c2f44
  5. Affected versionversion=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <8797b7712de704dc231f9e821d8eb3b9aeb3a032
  6. Affected versionversion=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <9b07fb464eb69a752406e78e62ab3a60bfa7b00d
  7. Affected versionversion=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <b9322408d83accc8b96322bc7356593206288c56
  8. Affected versionversion=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <c6963a06ce5c61d3238751ada04ee1569663a828
  9. Affected versionversion=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <ce8f9fb651fac95dd41f69afe54d935420b945bd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.29; version=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <16c507df509113c037cdc0ba642b9ab3389bd26c; version=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <297f14fbb81895f4ccdb0ad25d196786d6461e00; version=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <57f048c2d205b85e34282a9b0b0ae177e84c2f44; version=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <8797b7712de704dc231f9e821d8eb3b9aeb3a032; version=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <9b07fb464eb69a752406e78e62ab3a60bfa7b00d; version=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <b9322408d83accc8b96322bc7356593206288c56; version=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <c6963a06ce5c61d3238751ada04ee1569663a828; version=ed9eccbe8970f6eedc1b978c157caf1251a896d4 <ce8f9fb651fac95dd41f69afe54d935420b945bd

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 exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

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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