CVE-2026-53183

Katalog CVE

CVSS 7.5 · High EPSS 0,48%

Kerentanan pada linux kernel. Skor CVSS 3.1 7.5 (High) menurut CNA.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: mptcp: allow subflow rcv wnd to shrink In MPTCP connection, the `window` field in the TCP header refers to the MPTCP-level rcv_nxt and it's right edge should not move backward. Such constraint is enforced at DSS option generation time. At the same time, the TCP stack ensures independently that the TCP-level rcv wnd right's edge does not move backward. That in turn causes artificial inflating of the MPTCP rcv window when the incoming data is acked at the TCP level and is OoO in the MPTCP sequence space (or lands in the backlog). As a consequence, the incoming traffic can exceed the receiver rcvbuf size even when the sender is not misbehaving. Prevent such scenario forcibly allowing the TCP subflow to shrink the TCP-level rcv wnd regardless of the current netns setting.

Rincian

Terbit di NVD

25 Juni 2026

Terakhir diubah

6 Juli 2026

Status NVD

Analyzed

CVSS 3.1

7.5 (High), sumber CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

EPSS (30 hari)

0,48% peluang dieksploitasi; lebih tinggi dari 39,5% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/653245266913f03fcf21cbca68eed5c197a33e52 patch
• https://git.kernel.org/stable/c/aa3861f40ac32706d9e97bfac76984613e278788 patch
• https://git.kernel.org/stable/c/b1fd13074f22105deec45aa02283e322733e0c2d patch
• https://git.kernel.org/stable/c/bf364b0f10b27679140699821f88af7f01e2a6e3 patch
• https://git.kernel.org/stable/c/c297a4e65c50a2b807d9309b22615080faffa8f3 patch
• https://git.kernel.org/stable/c/da23be77e1292cd611e736c3aa17da633d7ddce7 patch