CVE-2023-53839
dccp: fix data-race around dp->dccps_mss_cache
Vexday Risk Score
3Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
09 Dec 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/162fa1e3cfb62aa780d7c40c8cccb6c2f8bef7c1https://git.kernel.org/stable/c/2bdc7f272b3a110a4e1fdee6c47c8d20f9b20817https://git.kernel.org/stable/c/67eebc7a9217f999b779d46fba5312a716f0dc1dhttps://git.kernel.org/stable/c/6d701c95ee6463abcbb6da543060d6e444554135https://git.kernel.org/stable/c/a47e598fbd8617967e49d85c49c22f9fc642704chttps://git.kernel.org/stable/c/a6ddc1c774874dc704f96a99d015dc759627bba7https://git.kernel.org/stable/c/d1f38d313bdfc52fb2f662e66d0c60dd1cfe2384https://git.kernel.org/stable/c/f239c9e1d98b313435481b4926e8bdd06197e4d8