CVE-2023-54085
mptcp: fix NULL pointer dereference on fastopen early fallback
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix NULL pointer dereference on fastopen early fallback In case of early fallback to TCP, subflow_syn_recv_sock() deletes the subflow context before returning the newly allocated sock to the caller. The fastopen path does not cope with the above unconditionally dereferencing the subflow context.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Dec 24, 2025 |
| Last Updated | Aug 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
36b122baf6a8bd46b4a591f12f4ed17b22257408 < 95135835519b0ab931c39908b2c99e9fb3c9068b 36b122baf6a8bd46b4a591f12f4ed17b22257408 < c0ff6f6da66a7791a32c0234388b1bdc00244917
Linux / Linux
6.2