CVE-2024-56585

System startup interruption via sleeping RT spinlock

Published Dec 27, 2024 · Updated May 11, 2026

Improper locking in Linux beginning with 5.19 can interrupt startup on LoongArch PREEMPT_RT systems when a secondary CPU initializes. In setup_tlb_handler(), alloc_pages_node() enters the PREEMPT_RT page allocator with interrupts disabled, where rt_spin_lock() sleeps in atomic context. NVD assesses local low-privileged reachability, while the published trace demonstrates the fault during secondary-CPU startup rather than a user-controlled trigger.

CVSS severity5.5
Medium
EPSS probability0.18%
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 Linux beginning with 5.19 can interrupt startup on LoongArch PREEMPT_RT systems when a secondary CPU initializes. In setup_tlb_handler(), alloc_pages_node() enters the PREEMPT_RT page allocator with interrupts disabled, where rt_spin_lock() sleeps in atomic context. NVD assesses local low-privileged reachability, while the published trace demonstrates the fault during secondary-CPU startup rather than a user-controlled trigger.

The record

CVE
CVE-2024-56585
Published
Dec 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 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

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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=5.19
  2. Affected versionversion=fa96b57c149061f71a70bd6582d995f6424fbbf4 <08715b741f9b2a925d6485491e4907f3b29bac70
  3. Affected versionversion=fa96b57c149061f71a70bd6582d995f6424fbbf4 <6575e0867bd478a5d7ef1783ca1e73160807d238
  4. Affected versionversion=fa96b57c149061f71a70bd6582d995f6424fbbf4 <88fd2b70120d52c1010257d36776876941375490
  5. Affected versionversion=fa96b57c149061f71a70bd6582d995f6424fbbf4 <c5f89458a2ea0800866b9fc690d3fa8367dc8f8d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=fa96b57c149061f71a70bd6582d995f6424fbbf4 <08715b741f9b2a925d6485491e4907f3b29bac70; version=fa96b57c149061f71a70bd6582d995f6424fbbf4 <6575e0867bd478a5d7ef1783ca1e73160807d238; version=fa96b57c149061f71a70bd6582d995f6424fbbf4 <88fd2b70120d52c1010257d36776876941375490; version=fa96b57c149061f71a70bd6582d995f6424fbbf4 <c5f89458a2ea0800866b9fc690d3fa8367dc8f8d

Published CVSS scores

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)
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.

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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