CVE-2023-53030

Availability loss via sleeping allocation in atomic context

Published Mar 27, 2025 · Updated May 23, 2026

Improper locking in affected Linux kernel releases allows local users to cause availability loss during OcteonTX2 interface initialization. The otx2_open path disables preemption before otx2_sq_aura_pool_init performs a GFP_KERNEL allocation that can sleep, placing a blocking allocation in atomic context. Reachability requires local low-privileged access and Marvell OcteonTX2 or CN10K hardware; published sources do not specify whether the interruption is a hang or crash.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in affected Linux kernel releases allows local users to cause availability loss during OcteonTX2 interface initialization. The otx2_open path disables preemption before otx2_sq_aura_pool_init performs a GFP_KERNEL allocation that can sleep, placing a blocking allocation in atomic context. Reachability requires local low-privileged access and Marvell OcteonTX2 or CN10K hardware; published sources do not specify whether the interruption is a hang or crash.

The record

CVE
CVE-2023-53030
Published
Mar 27, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 27, 2025CVE 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=4af1b64f80fbe1275fb02c5f1c0cef099a4a231f <87b93b678e95c7d93fe6a55b0e0fbda26d8c7760
  2. Affected versionversion=5.15.87 <5.15.91
  3. Affected versionversion=6.0.19 <6.1
  4. Affected versionversion=6.1.5 <6.1.8
  5. Affected versionversion=667ce030bdfb62a86266444b2c3fd6ab98b9df9b <1eb57b87f106c90cee6b2a56a10f2e29c7a25f3e
  6. Affected versionversion=6ea5273c71dd2d07c0a2459594eb34bc087939f7 <2827c4eb429db64befdca11362e2b1c5f524f6ba
  7. Affected versionversion=b754dc7c933dd9464223f64b10d33d68ab086cc6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4af1b64f80fbe1275fb02c5f1c0cef099a4a231f <87b93b678e95c7d93fe6a55b0e0fbda26d8c7760; version=5.15.87 <5.15.91; version=6.0.19 <6.1; version=6.1.5 <6.1.8; version=667ce030bdfb62a86266444b2c3fd6ab98b9df9b <1eb57b87f106c90cee6b2a56a10f2e29c7a25f3e; version=6ea5273c71dd2d07c0a2459594eb34bc087939f7 <2827c4eb429db64befdca11362e2b1c5f524f6ba; version=b754dc7c933dd9464223f64b10d33d68ab086cc6

Published CVSS scores

5.5UbuntuCVSS: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-667Improper Locking
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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