CVE-2023-52642

Unauthorized BPF attachment via read-only LIRC descriptor

Published Apr 17, 2024 · Updated May 11, 2026

Missing authorization in the Linux media remote-control subsystem allows local users to modify LIRC BPF attachments. The LIRC BPF attach and detach paths accept a device file opened without write permission, so a read-only descriptor can change the device's program array. Exploitation still requires CAP_NET_ADMIN and an LIRC device with BPF mode support; the resulting access is limited to attaching or detaching LIRC-mode eBPF programs.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in the Linux media remote-control subsystem allows local users to modify LIRC BPF attachments. The LIRC BPF attach and detach paths accept a device file opened without write permission, so a read-only descriptor can change the device's program array. Exploitation still requires CAP_NET_ADMIN and an LIRC device with BPF mode support; the resulting access is limited to attaching or detaching LIRC-mode eBPF programs.

The record

CVE
CVE-2023-52642
Published
Apr 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-862
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Apr 17, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=4.18
  2. Affected versionversion=f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936 <6a9d552483d50953320b9d3b57abdee8d436f23f
  3. Affected versionversion=f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936 <93136132d1b5792bf44151e3494ae3691cd738e8
  4. Affected versionversion=f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936 <93d8109bf182510629bbefc8cd45296d2393987f
  5. Affected versionversion=f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936 <9f6087851ec6dce5b15f694aeaf3e8ec8243224e
  6. Affected versionversion=f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936 <caf2da1d4562de4e35eedec0be2b7f1ee25d83be
  7. Affected versionversion=f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936 <d98210108e7b2ff64b332b0a3541c8ad6a0617b0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.18; version=f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936 <6a9d552483d50953320b9d3b57abdee8d436f23f; version=f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936 <93136132d1b5792bf44151e3494ae3691cd738e8; version=f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936 <93d8109bf182510629bbefc8cd45296d2393987f; version=f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936 <9f6087851ec6dce5b15f694aeaf3e8ec8243224e; version=f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936 <caf2da1d4562de4e35eedec0be2b7f1ee25d83be; version=f4364dcfc86df7c1ca47b256eaf6b6d0cdd0d936 <d98210108e7b2ff64b332b0a3541c8ad6a0617b0

Published CVSS scores

7.8UbuntuCVSS: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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization

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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