What is CVE-2023-53839?

CVE-2023-53839 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 2.6.14 onward and patched in 4.14.323, 4.19.292, 5.4.254 and others. CVE-2023-53839 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53839?

CVE-2023-53839 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2023-53839?

Yes, CVE-2023-53839 has been patched. Fixed versions include 4.14.323, 4.19.292, 5.4.254 and others. If you are running Linux kernel 2.6.14 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53839 actively exploited?

CVE-2023-53839 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53839

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.

Package Linux Kernel

Published 2025-12-09

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 2.6.14 and later are affected. Fixed in 4.14.323, 4.19.292, 5.4.254, 5.10.191, 5.15.127, 6.1.46, 6.4.11, 6.5 and their respective stable series.

Affected from

≥ 2.6.14

Fixed in

✓ 4.14.323 4.14.x ✓ 4.19.292 4.19.x ✓ 5.4.254 5.4.x ✓ 5.10.191 5.10.x ✓ 5.15.127 5.15.x ✓ 6.1.46 6.1.x ✓ 6.4.11 6.4.x ✓ 6.5

References

8 total

Showing 5 of 8 references View all on NVD

Frequently asked questions

What is CVE-2023-53839?

CVE-2023-53839 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.14 onward and has been patched in 4.14.323, 4.19.292, 5.4.254 and others. CVE-2023-53839 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2023-53839?

Yes. CVE-2023-53839 has been patched. Fixed versions include 4.14.323, 4.19.292, 5.4.254 and others. If you are running Linux kernel 2.6.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53839 actively exploited?

No. CVE-2023-53839 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.