CVE-2024-41041

Local kernel crash via UDP socket race

Published Jul 29, 2024 · Updated Aug 5, 2026

Race condition in the Linux kernel allows local users to crash the system through concurrent UDP socket lookup and binding. udp_lib_get_port() inserts a bound socket into the UDP hash table before setting SOCK_RCU_FREE, while early-demultiplexing lookup code checks that flag too soon and can access the socket during the resulting RCU race window. Exploitation requires low-privileged local access and successful race timing; the documented consequence is an availability-only kernel failure.

CVSS severity5.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux kernel allows local users to crash the system through concurrent UDP socket lookup and binding. udp_lib_get_port() inserts a bound socket into the UDP hash table before setting SOCK_RCU_FREE, while early-demultiplexing lookup code checks that flag too soon and can access the socket during the resulting RCU race window. Exploitation requires low-privileged local access and successful race timing; the documented consequence is an availability-only kernel failure.

The record

CVE
CVE-2024-41041
Published
Jul 29, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=4.20
  2. Affected versionversion=6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 <20ceae10623c3b29fdf7609690849475bcdebdb0
  3. Affected versionversion=6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 <5c0b485a8c6116516f33925b9ce5b6104a6eadfd
  4. Affected versionversion=6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 <7a67c4e47626e6daccda62888f8b096abb5d3940
  5. Affected versionversion=6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 <9f965684c57c3117cfd2f754dd3270383c529fba
  6. Affected versionversion=6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 <a6db0d3ea6536e7120871e5448b3032570152ec6
  7. Affected versionversion=6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 <c5fd77ca13d657c6e99bf04f0917445e6a80231e
  8. Affected versionversion=6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 <ddf516e50bf8a7bc9b3bd8a9831f9c7a8131a32a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.20; version=6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 <20ceae10623c3b29fdf7609690849475bcdebdb0; version=6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 <5c0b485a8c6116516f33925b9ce5b6104a6eadfd; version=6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 <7a67c4e47626e6daccda62888f8b096abb5d3940; version=6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 <9f965684c57c3117cfd2f754dd3270383c529fba; version=6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 <a6db0d3ea6536e7120871e5448b3032570152ec6; version=6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 <c5fd77ca13d657c6e99bf04f0917445e6a80231e; version=6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 <ddf516e50bf8a7bc9b3bd8a9831f9c7a8131a32a

Published CVSS scores

5.5CanonicalCVSS: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.

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Technologies

Your stack

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Your stack

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