8.2

CVE-2026-63867

mptcp: close TOCTOU race while computing rcv_wnd

In the Linux kernel, the following vulnerability has been resolved:

mptcp: close TOCTOU race while computing rcv_wnd

The MPTCP output path access locklessly the MPTCP-level ack_seq
in multiple times, using possibly different values for the data_ack
in the DSS option and to compute the announced rcv wnd for the same
packet.

Refactor the cote to avoid inconsistencies which may confuse the
peer. Also ensure that the MPTCP level rcv wnd is updated only when
the egress packet actually contains a DSS ack.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version fa3fe2b150316b294f2c662653501273ff25bba8
Version < 301a33fd590c408a05c5df800e0cc1e6a8a2f8f8
Status affected
Version fa3fe2b150316b294f2c662653501273ff25bba8
Version < 68364963e5baf03f16b4420292291f75c8f66497
Status affected
Version fa3fe2b150316b294f2c662653501273ff25bba8
Version < 907ac6b1658e0277f979fcdfae2a753b495c1510
Status affected
Version fa3fe2b150316b294f2c662653501273ff25bba8
Version < c4f4cf60797974873dbc8e100144682a6f2f861f
Status affected
Version fa3fe2b150316b294f2c662653501273ff25bba8
Version < 3b8cbba7c0ed31189c89f90be247b8973ffa79ef
Status affected
Version fa3fe2b150316b294f2c662653501273ff25bba8
Version < 8f4f0a157e8436a05bf8c3670b24dbc258911c43
Status affected
Version fa3fe2b150316b294f2c662653501273ff25bba8
Version < 8ab24fdebc369c0dfb90f82c1650b1e66662bb45
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 5.11
Status affected
Version 0
Version < 5.11
Status unaffected
Version <= 5.15.*
Version 5.15.210
Status unaffected
Version <= 6.1.*
Version 6.1.176
Status unaffected
Version <= 6.6.*
Version 6.6.143
Status unaffected
Version <= 6.12.*
Version 6.12.94
Status unaffected
Version <= 6.18.*
Version 6.18.36
Status unaffected
Version <= 7.0.*
Version 7.0.13
Status unaffected
Version <= *
Version 7.1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.32% 0.244
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 8.2 3.9 4.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/301a33fd590c408a05c5df800e0cc1e6a8a2f8f8
https://git.kernel.org/stable/c/68364963e5baf03f16b4420292291f75c8f66497
https://git.kernel.org/stable/c/907ac6b1658e0277f979fcdfae2a753b495c1510
https://git.kernel.org/stable/c/c4f4cf60797974873dbc8e100144682a6f2f861f
https://git.kernel.org/stable/c/3b8cbba7c0ed31189c89f90be247b8973ffa79ef
https://git.kernel.org/stable/c/8f4f0a157e8436a05bf8c3670b24dbc258911c43
https://git.kernel.org/stable/c/8ab24fdebc369c0dfb90f82c1650b1e66662bb45