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CVE-2023-54085

mptcp: fix NULL pointer dereference on fastopen early fallback

High7.5EPSS 0.43%
Published
Updated
Reserved
Assigned by
Linux

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.

Scores

CVSS scores of CVE-2023-54085, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1High7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Deferred3.1High7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.43% · top 63% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: yes · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Affected products

  • Linux · Linux

    • affected 36b122baf6a8bd46b4a591f12f4ed17b22257408 – < 95135835519b0ab931c39908b2c99e9fb3c9068b
    • affected 36b122baf6a8bd46b4a591f12f4ed17b22257408 – < c0ff6f6da66a7791a32c0234388b1bdc00244917

  • Linux · Linux

    • affected 6.2
    • unaffected < 6.2
    • unaffected 6.2.12 – ≤ 6.2.*
    • unaffected 6.3 – ≤ *

References (2)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .