Vulnerability in Linux

CVE-2023-54085

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.

EPSS: 0.002 (6.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

  • Linux — versions 36b122baf6a8bd46b4a591f12f4ed17b22257408, 6.2, 0

References

Frequently asked questions

What is CVE-2023-54085?
CVE-2023-54085 is a high-severity vulnerability in Linux. CVSS score: 7.5/10. Published 2025-12-24.
How severe is CVE-2023-54085?
High severity. CVSS v3 base score is 7.5 out of 10.