CVE-2024-53089

Scheduling fault via soft-IRQ timer expiry

Published Nov 21, 2024 · Updated May 11, 2026

Availability flaw in LoongArch KVM in Linux 5.19 through 6.11.8 allows local users to trigger a scheduling-while-atomic fault. arch/loongarch/kvm/timer.c starts the virtual CPU software timer without hard-expiry mode, so PREEMPT_RT moves expiry to soft-IRQ context before kvm_restore_timer cancels it with preemption disabled. Reachability requires a LoongArch host running KVM with PREEMPT_RT and a local user permitted to exercise a virtual CPU; the demonstrated consequence is a kernel scheduling fault.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Availability flaw in LoongArch KVM in Linux 5.19 through 6.11.8 allows local users to trigger a scheduling-while-atomic fault. arch/loongarch/kvm/timer.c starts the virtual CPU software timer without hard-expiry mode, so PREEMPT_RT moves expiry to soft-IRQ context before kvm_restore_timer cancels it with preemption disabled. Reachability requires a LoongArch host running KVM with PREEMPT_RT and a local user permitted to exercise a virtual CPU; the demonstrated consequence is a kernel scheduling fault.

The record

CVE
CVE-2024-53089
Published
Nov 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 21, 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 <1e4c384a4be9ed1e069e24f388ab2ee9951b77b5
  3. Affected versionversion=fa96b57c149061f71a70bd6582d995f6424fbbf4 <73adbd92f3223dc0c3506822b71c6b259d5d537b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=fa96b57c149061f71a70bd6582d995f6424fbbf4 <1e4c384a4be9ed1e069e24f388ab2ee9951b77b5; version=fa96b57c149061f71a70bd6582d995f6424fbbf4 <73adbd92f3223dc0c3506822b71c6b259d5d537b

Published CVSS scores

5.5CISA-ADPCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

T1499Endpoint Denial of Service

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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