CVE-2024-0641

Local denial of service via interrupt-unsafe locking

Published Jan 17, 2024 · Updated Nov 20, 2025

Deadlock in the Linux Kernel TIPC subsystem before 6.6-rc5 allows local users to hang or crash the host during key revocation. tipc_crypto_key_revoke() acquires tx->lock without disabling bottom halves, allowing a timer or receive softirq callback to enter the same path and spin on the already-held lock. Reachability requires local low-privilege access and an active TIPC encryption or authentication key-revocation path; the bounded consequence is host unavailability.

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

What happened

Deadlock in the Linux Kernel TIPC subsystem before 6.6-rc5 allows local users to hang or crash the host during key revocation. tipc_crypto_key_revoke() acquires tx->lock without disabling bottom halves, allowing a timer or receive softirq callback to enter the same path and spin on the already-held lock. Reachability requires local low-privilege access and an active TIPC encryption or authentication key-revocation path; the bounded consequence is host unavailability.

The record

CVE
CVE-2024-0641
Published
Jan 17, 2024
Updated
Nov 20, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-667, CWE-833, CAPEC-25, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 20, 2025Record 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=0 <6.6-rc5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0 <6.6-rc5

Published CVSS scores

5.5Red Hat, Inc.CVSS: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
CWE-833Deadlock
CAPEC-25Forced Deadlock
T1499Endpoint Denial of Service

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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