CVE-2023-53839 - Vulnerability Details

- dccp: fix data-race around dp->dccps_mss_cache

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.

Published: 2025-12-09

Score: 7.0 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c`	affected	< 162fa1e3cfb62aa780d7c40c8cccb6c2f8bef7c1
`7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c`	affected	< 2bdc7f272b3a110a4e1fdee6c47c8d20f9b20817
`7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c`	affected	< 67eebc7a9217f999b779d46fba5312a716f0dc1d
`7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c`	affected	< 6d701c95ee6463abcbb6da543060d6e444554135
`7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c`	affected	< f239c9e1d98b313435481b4926e8bdd06197e4d8
`7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c`	affected	< a6ddc1c774874dc704f96a99d015dc759627bba7
`7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c`	affected	< d1f38d313bdfc52fb2f662e66d0c60dd1cfe2384
`7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c`	affected	< a47e598fbd8617967e49d85c49c22f9fc642704c

Linux

affected

Version	Status	Constraints
`2.6.14`	affected	—
`0`	unaffected	< 2.6.14
`4.14.323`	unaffected	≤ 4.14.*
`4.19.292`	unaffected	≤ 4.19.*
`5.4.254`	unaffected	≤ 5.4.*
`5.10.191`	unaffected	≤ 5.10.*
`5.15.127`	unaffected	≤ 5.15.*
`6.1.46`	unaffected	≤ 6.1.*
`6.4.11`	unaffected	≤ 6.4.*
`6.5`	unaffected	≤ *

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00029.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/162fa1e3cfb62aa780d7c40c8cccb6c2f8bef7c1
https://git.kernel.org/stable/c/2bdc7f272b3a110a4e1fdee6c47c8d20f9b20817
https://git.kernel.org/stable/c/67eebc7a9217f999b779d46fba5312a716f0dc1d
https://git.kernel.org/stable/c/6d701c95ee6463abcbb6da543060d6e444554135
https://git.kernel.org/stable/c/a47e598fbd8617967e49d85c49c22f9fc642704c
https://git.kernel.org/stable/c/a6ddc1c774874dc704f96a99d015dc759627bba7
https://git.kernel.org/stable/c/d1f38d313bdfc52fb2f662e66d0c60dd1cfe2384
https://git.kernel.org/stable/c/f239c9e1d98b313435481b4926e8bdd06197e4d8
https://lore.kernel.org/linux-cve-announce/2025120956-CVE-2023-53839-5f7e@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2023-53839
https://www.cve.org/CVERecord?id=CVE-2023-53839

History

Wed, 10 Dec 2025 12:15:00 +0000

Type	Values Removed	Values Added
References		https://lore.kernel.org/linux-cve-announce/2025120956-CVE-2023-53839-5f7e@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2023-53839 https://www.cve.org/CVERecord?id=CVE-2023-53839
Metrics	threat_severity `None`	cvssV3_1 `{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}` threat_severity `Moderate`

Tue, 09 Dec 2025 02:00:00 +0000

Type	Values Removed	Values Added
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.
Title		dccp: fix data-race around dp->dccps_mss_cache
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/162fa1e3cfb62aa780d7c40c8cccb6c2f8bef7c1 https://git.kernel.org/stable/c/2bdc7f272b3a110a4e1fdee6c47c8d20f9b20817 https://git.kernel.org/stable/c/67eebc7a9217f999b779d46fba5312a716f0dc1d https://git.kernel.org/stable/c/6d701c95ee6463abcbb6da543060d6e444554135 https://git.kernel.org/stable/c/a47e598fbd8617967e49d85c49c22f9fc642704c https://git.kernel.org/stable/c/a6ddc1c774874dc704f96a99d015dc759627bba7 https://git.kernel.org/stable/c/d1f38d313bdfc52fb2f662e66d0c60dd1cfe2384 https://git.kernel.org/stable/c/f239c9e1d98b313435481b4926e8bdd06197e4d8

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-12-09T01:29:55.540Z

Updated: 2026-05-11T19:52:30.888Z

Reserved: 2025-12-09T01:27:17.826Z

Link: CVE-2023-53839

Vulnrichment

No data.

NVD

Status : Deferred

Published: 2025-12-09T16:17:23.527

Modified: 2026-04-15T00:35:42.020

Link: CVE-2023-53839

Redhat

Severity : Moderate

Publid Date: 2025-12-09T00:00:00Z

Links: CVE-2023-53839 - Bugzilla

OpenCVE Enrichment

No data.

Weaknesses

No weakness.

Tracking

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Subscriptions

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