CVE-2023-52656

No security impact from unreachable SCM_RIGHTS cleanup

Published May 13, 2024 · Updated Aug 5, 2026

Dead-code removal in Linux was assigned as a vulnerability, but upstream maintainers state that the change has no security impact. The change deletes unreachable io_uring SCM_RIGHTS bookkeeping left after support for passing io_uring file descriptors over Unix sockets was removed. The io_uring maintainer states that the code is not user-triggerable and that the actual vulnerability is tracked separately.

CVSS severity7.8
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Dead-code removal in Linux was assigned as a vulnerability, but upstream maintainers state that the change has no security impact. The change deletes unreachable io_uring SCM_RIGHTS bookkeeping left after support for passing io_uring file descriptors over Unix sockets was removed. The io_uring maintainer states that the code is not user-triggerable and that the actual vulnerability is tracked separately.

The record

CVE
CVE-2023-52656
Published
May 13, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. May 13, 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=2b188cc1bb857a9d4701ae59aa7768b5124e262e <6e5e6d274956305f1fc0340522b38f5f5be74bdb
  2. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <6fc19b3d8a45ff0e5d50ec8184cee1d5eac1a8ba
  3. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <88c49d9c896143cdc0f77197c4dcf24140375e89
  4. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <a3812a47a32022ca76bf46ddacdd823dc2aabf8b
  5. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <a6771f343af90a25f3a14911634562bb5621df02
  6. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <cfb24022bb2c31f1f555dc6bc3cc5e2547446fb3
  7. Affected versionversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <d909d381c3152393421403be4b6435f17a2378b4
  8. Affected versionversion=5.1

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2b188cc1bb857a9d4701ae59aa7768b5124e262e <6e5e6d274956305f1fc0340522b38f5f5be74bdb; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <6fc19b3d8a45ff0e5d50ec8184cee1d5eac1a8ba; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <88c49d9c896143cdc0f77197c4dcf24140375e89; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <a3812a47a32022ca76bf46ddacdd823dc2aabf8b; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <a6771f343af90a25f3a14911634562bb5621df02; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <cfb24022bb2c31f1f555dc6bc3cc5e2547446fb3; version=2b188cc1bb857a9d4701ae59aa7768b5124e262e <d909d381c3152393421403be4b6435f17a2378b4; version=5.1

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
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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