CVE-2023-52831

Kernel panic via empty scheduler-domain CPU mask

Published May 21, 2024 · Updated May 23, 2026

Reachable assertion in Linux 6.1.53 through 6.1.63, 6.4.16, 6.5.3 through 6.5.12, and 6.6 allows local users to crash the kernel. During CPU hotplug, generate_sched_domains intersects the top cpuset with the housekeeping mask and passes an empty CPU set to partition_sched_domains_locked. Exploitation requires low-privileged local access, an isolcpus configuration, and an attempt to offline the final housekeeping CPU; the result is a kernel panic and service interruption.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reachable assertion in Linux 6.1.53 through 6.1.63, 6.4.16, 6.5.3 through 6.5.12, and 6.6 allows local users to crash the kernel. During CPU hotplug, generate_sched_domains intersects the top cpuset with the housekeeping mask and passes an empty CPU set to partition_sched_domains_locked. Exploitation requires low-privileged local access, an isolcpus configuration, and an attempt to offline the final housekeeping CPU; the result is a kernel panic and service interruption.

The record

CVE
CVE-2023-52831
Published
May 21, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-617, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=07f9e0c9987bf1c4ef57611ad2f789ba68978102 <335a47ed71e332c82339d1aec0c7f6caccfcda13
  2. Affected versionversion=2b8272ff4a70b866106ae13c36be7ecbef5d5da2 <3073f6df783d9d75f7f69f73e16c7ef85d6cfb63
  3. Affected versionversion=2b8272ff4a70b866106ae13c36be7ecbef5d5da2 <38685e2a0476127db766f81b1c06019ddc4c9ffa
  4. Affected versionversion=6.1.53 <6.1.64
  5. Affected versionversion=6.4.16 <6.5
  6. Affected versionversion=6.5.3 <6.5.13
  7. Affected versionversion=6.6
  8. Affected versionversion=9734e4c0c470258c32b6aa5ea7ef8a86506c0909
  9. Affected versionversion=fea9dd8653ff39ce383c54e747bde4c39289b4ad <3410b702354702b500bde10e3cc1f9db8731d908

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=07f9e0c9987bf1c4ef57611ad2f789ba68978102 <335a47ed71e332c82339d1aec0c7f6caccfcda13; version=2b8272ff4a70b866106ae13c36be7ecbef5d5da2 <3073f6df783d9d75f7f69f73e16c7ef85d6cfb63; version=2b8272ff4a70b866106ae13c36be7ecbef5d5da2 <38685e2a0476127db766f81b1c06019ddc4c9ffa; version=6.1.53 <6.1.64; version=6.4.16 <6.5; version=6.5.3 <6.5.13; version=6.6; version=9734e4c0c470258c32b6aa5ea7ef8a86506c0909; version=fea9dd8653ff39ce383c54e747bde4c39289b4ad <3410b702354702b500bde10e3cc1f9db8731d908

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS: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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion
T1499.004Application or System Exploitation

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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