CVE-2026-45889

Katalog CVE

CVSS 5.5 · Medium EPSS 0,16%

Kerentanan Divide By Zero pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: mptcp: do not account for OoO in mptcp_rcvbuf_grow() MPTCP-level OoOs are physiological when multiple subflows are active concurrently and will not cause retransmissions nor are caused by drops. Accounting for them in mptcp_rcvbuf_grow() causes the rcvbuf slowly drifting towards tcp_rmem[2]. Remove such accounting. Note that subflows will still account for TCP-level OoO when the MPTCP-level rcvbuf is propagated. This also closes a subtle and very unlikely race condition with rcvspace init; active sockets with user-space holding the msk-level socket lock, could complete such initialization in the receive callback, after that the first OoO data reaches the rcvbuf and potentially triggering a divide by zero Oops.

Rincian

Terbit di NVD

27 Mei 2026

Terakhir diubah

25 Juni 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-369: Divide By Zero

EPSS (30 hari)

0,16% peluang dieksploitasi; lebih tinggi dari 4,6% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/400ee4854adef1e4983812a3decf6717ea020136 patch
• https://git.kernel.org/stable/c/6b329393502e5857662b851a13f947209c588587 patch
• https://git.kernel.org/stable/c/fb7bf00b04a6b48859f52035d4e745848c2b4c79 patch