CVE-2023-54085

Published: Dec 24, 2025

Modified: May 11, 2026

PUBLISHED

Description

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	Product	Versions
Linux	Linux	affected `36b122baf6a8bd46b4a591f12f4ed17b22257408 - < 95135835519b0ab931c39908b2c99e9fb3c9068b` affected `36b122baf6a8bd46b4a591f12f4ed17b22257408 - < c0ff6f6da66a7791a32c0234388b1bdc00244917`
Linux	Linux	affected `6.2` unaffected `0 - < 6.2` unaffected `6.2.12 - <= 6.2.` unaffected `6.3 - <= `

References

https://git.kernel.org/stable/c/95135835519b0ab931c39908b2c99e9fb3c9068b

https://git.kernel.org/stable/c/c0ff6f6da66a7791a32c0234388b1bdc00244917

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CVE-2023-54085

Description

Affected Products

References