VDB-335031 · CVE-2023-53839 · Nessus 281815

Linux Kernel up to 6.4.10 dccp dccp_sendmsg race condition

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4.4	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel up to 6.4.10. This issue affects the function dccp_sendmsg of the component dccp. Performing a manipulation results in race condition. This vulnerability is identified as CVE-2023-53839. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.4.10. It has been classified as critical. This affects the function dccp_sendmsg of the component dccp. The manipulation with an unknown input leads to a race condition vulnerability. CWE is classifying the issue as CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: dccp: fix data-race around dp->dccps_mss_cache dccp_sendmsg() reads dp->dccps_mss_cache before locking the socket. Same thing in do_dccp_getsockopt(). Add READ_ONCE()/WRITE_ONCE() annotations, and change dccp_sendmsg() to check again dccps_mss_cache after socket is locked.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2023-53839 since 12/09/2025. The exploitability is told to be difficult. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 281815 (Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2025-116 (ALASKERNEL-5.4-2025-116)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.14.323, 4.19.292, 5.4.254, 5.10.191, 5.15.127, 6.1.46 or 6.4.11 eliminates this vulnerability. Applying the patch 162fa1e3cfb62aa780d7c40c8cccb6c2f8bef7c1/2bdc7f272b3a110a4e1fdee6c47c8d20f9b20817/67eebc7a9217f999b779d46fba5312a716f0dc1d/6d701c95ee6463abcbb6da543060d6e444554135/f239c9e1d98b313435481b4926e8bdd06197e4d8/a6ddc1c774874dc704f96a99d015dc759627bba7/d1f38d313bdfc52fb2f662e66d0c60dd1cfe2384/a47e598fbd8617967e49d85c49c22f9fc642704c 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 databases at Tenable (281815) and CERT Bund (WID-SEC-2025-2765). Be aware that VulDB is the high quality source for vulnerability data.

Affected

Debian Linux
Amazon Linux 2
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
SUSE openSUSE
Open Source Linux Kernel
RESF Rocky Linux

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.4

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 281815
Nessus Name: Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2025-116 (ALASKERNEL-5.4-2025-116)

Threat Intelligenceinfo

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

Countermeasuresinfo

Timelineinfo

12/09/2025 Advisory disclosed
12/09/2025 +0 days CVE reserved
12/09/2025 +0 days VulDB entry created
03/30/2026 +111 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53839 (🔒)
GCVE (CVE): GCVE-0-2023-53839
GCVE (VulDB): GCVE-100-335031
CERT Bund: WID-SEC-2025-2765 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 12/09/2025 11:11
Updated: 03/30/2026 02:12
Changes: 12/09/2025 11:11 (59), 01/06/2026 12:59 (2), 03/30/2026 02:12 (7)
Complete: 🔍
Cache ID: 216::103