Linux Kernel up to 6.9.4 __xsk_flush denial of service

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.9.4. This impacts the function __xsk_flush. This manipulation causes denial of service. This vulnerability is handled as CVE-2024-39293. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.9.4. Affected by this vulnerability is the function __xsk_flush. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: Revert "xsk: Support redirect to any socket bound to the same umem" This reverts commit 2863d665ea41282379f108e4da6c8a2366ba66db. This patch introduced a potential kernel crash when multiple napi instances redirect to the same AF_XDP socket. By removing the queue_index check, it is possible for multiple napi instances to access the Rx ring at the same time, which will result in a corrupted ring state which can lead to a crash when flushing the rings in __xsk_flush(). This can happen when the linked list of sockets to flush gets corrupted by concurrent accesses. A quick and small fix is not possible, so let us revert this for now.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2024-39293 since 06/24/2024. The exploitation appears to be difficult. Technical details are known, but no exploit is available.

Upgrading to version 6.9.5 eliminates this vulnerability. Applying the patch 19cb40b10645/7fcf26b315bb is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2024-1451). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • RESF Rocky Linux
  • Open Source Linux Kernel
  • IBM QRadar SIEM
  • Dell PowerProtect Data Domain
  • Dell PowerProtect Data Domain Management Center
  • Dell PowerProtect Data Domain OS

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.9.5
Patch: 19cb40b10645/7fcf26b315bb

Timelineinfo

06/24/2024 🔍
06/25/2024 +1 days 🔍
06/25/2024 +0 days 🔍
04/07/2026 +650 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2024-39293 (🔍)
GCVE (CVE): GCVE-0-2024-39293
GCVE (VulDB): GCVE-100-269641
CERT Bund: WID-SEC-2024-1451 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 06/25/2024 17:11
Updated: 04/07/2026 00:28
Changes: 06/25/2024 17:11 (57), 09/17/2025 18:34 (11), 04/07/2026 00:28 (7)
Complete: 🔍
Cache ID: 216:D11:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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