CVE-2023-53839
Unknown Unknown - Not Provided

BaseFortify

Publication date: 2025-12-09

Last updated on: 2025-12-09

Assigner: kernel.org

Description
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.

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Meta Information

Published
2025-12-09
Last Modified
2025-12-09
Generated
2026-07-06
AI Q&A
2025-12-09
EPSS Evaluated
2026-07-05
NVD
CVE-2023-53839
EUVD
EUVD-2023-60157

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is a data-race condition in the Linux kernel's DCCP (Datagram Congestion Control Protocol) implementation. Specifically, the function dccp_sendmsg() reads the dp->dccps_mss_cache variable before the socket is locked, which can lead to inconsistent or incorrect behavior. The same issue occurs in do_dccp_getsockopt(). The fix involved adding READ_ONCE()/WRITE_ONCE() annotations to ensure proper memory access ordering and modifying dccp_sendmsg() to re-check dp->dccps_mss_cache after acquiring the socket lock.

Impact Analysis

This vulnerability could lead to race conditions causing inconsistent or incorrect behavior in the DCCP protocol handling within the Linux kernel. This might result in unexpected application behavior, potential crashes, or security issues related to improper handling of network data. However, specific impacts are not detailed in the provided information.

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