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.

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 0.00036.

Key SSVC decision points have not yet been added.

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 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 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.

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

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

Type Values Removed Values Added
References
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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

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

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

Link: CVE-2023-53839

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

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

Modified: 2025-12-09T18:37:13.640

Link: CVE-2023-53839

cve-icon Redhat

Severity : Moderate

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

Links: CVE-2023-53839 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.