CVE-2023-53839

dccp: fix data-race around dp->dccps_mss_cache

N/A

Published: December 9, 2025 at 01:29 AM UTC

Updated: June 17, 2026 at 06:46 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

N/A

Exploit prediction

EPSS 0.3%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

2.6.14 ≤ v < 4.14.3232.6.14 ≤ v < 4.19.2922.6.14 ≤ v < 5.10.1912.6.14 ≤ v < 5.15.1272.6.14 ≤ v < 5.4.2542.6.14 ≤ v < 6.1.462.6.14 ≤ v < 6.4.112.6.14 ≤ v < 6.52.6.147c657876b63cb1d8a2ec06f8fc6c37bb8412e66c

Vendor states this is fixed in 162fa1e3cfb62aa780d7c40c8cccb6c2f8bef7c1 (fixed)

Vendor states this is fixed in 2bdc7f272b3a110a4e1fdee6c47c8d20f9b20817 (fixed)

Vendor states this is fixed in 67eebc7a9217f999b779d46fba5312a716f0dc1d (fixed)

Vendor states this is fixed in 6d701c95ee6463abcbb6da543060d6e444554135 (fixed)

Vendor states this is fixed in a47e598fbd8617967e49d85c49c22f9fc642704c (fixed)

Vendor states this is fixed in a6ddc1c774874dc704f96a99d015dc759627bba7 (fixed)

Vendor states this is fixed in d1f38d313bdfc52fb2f662e66d0c60dd1cfe2384 (fixed)

Vendor states this is fixed in f239c9e1d98b313435481b4926e8bdd06197e4d8 (fixed)

Vendor states this is fixed in 2.6.14 (unaffected)

Vendor states this is fixed in 4.14.323 (unaffected)

Vendor states this is fixed in 4.19.292 (unaffected)

Vendor states this is fixed in 5.10.191 (unaffected)