CVE-2024-36936

Local service interruption via unfed soft-lockup watchdog

Published May 30, 2024 · Updated May 23, 2026

Denial of service in the Linux kernel allows local users to trigger a soft lockup during TD guest memory acceptance. The accept_memory() path leaves local interrupts disabled during time-consuming acceptance and fails to feed the soft-lockup watchdog before IRQ restoration. The condition requires a large TD guest and a one-second soft-lockup timeout, and the resulting CPU stall interrupts guest service.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel allows local users to trigger a soft lockup during TD guest memory acceptance. The accept_memory() path leaves local interrupts disabled during time-consuming acceptance and fails to feed the soft-lockup watchdog before IRQ restoration. The condition requires a large TD guest and a one-second soft-lockup timeout, and the resulting CPU stall interrupts guest service.

The record

CVE
CVE-2024-36936
Published
May 30, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 30, 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=50e782a86c980d4f8292ef82ed8139282ca07a98 <1c5a1627f48105cbab81d25ec2f72232bfaa8185
  2. Affected versionversion=50e782a86c980d4f8292ef82ed8139282ca07a98 <781e34b736014188ba9e46a71535237313dcda81
  3. Affected versionversion=50e782a86c980d4f8292ef82ed8139282ca07a98 <e115c1b5de55a105c75aba8eb08301c075fa4ef4
  4. Affected versionversion=6.5.9 <6.6
  5. Affected versionversion=6.6
  6. Affected versionversion=b583bfcc5a36dbd1db1984dbfcfd23ba64d23604

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=50e782a86c980d4f8292ef82ed8139282ca07a98 <1c5a1627f48105cbab81d25ec2f72232bfaa8185; version=50e782a86c980d4f8292ef82ed8139282ca07a98 <781e34b736014188ba9e46a71535237313dcda81; version=50e782a86c980d4f8292ef82ed8139282ca07a98 <e115c1b5de55a105c75aba8eb08301c075fa4ef4; version=6.5.9 <6.6; version=6.6; version=b583bfcc5a36dbd1db1984dbfcfd23ba64d23604

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

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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