CVE-2026-45889: Linux

Описание

Оригинално описание

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.

Засегнати продукти

• Linux Linux: e118cdc34dd109562b64f6a397f68cd33b041d5b преди fb7bf00b04a6b48859f52035d4e745848c2b4c79; e118cdc34dd109562b64f6a397f68cd33b041d5b преди 400ee4854adef1e4983812a3decf6717ea020136; e118cdc34dd109562b64f6a397f68cd33b041d5b преди 6b329393502e5857662b851a13f947209c588587
• Linux Linux: 6.18; преди 6.18; 6.18.14 до 6.18.*; 6.19.4 до 6.19.*; от 7.0 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-45889
• https://nvd.nist.gov/vuln/detail/CVE-2026-45889
• https://git.kernel.org/stable/c/fb7bf00b04a6b48859f52035d4e745848c2b4c79
• https://git.kernel.org/stable/c/400ee4854adef1e4983812a3decf6717ea020136
• https://git.kernel.org/stable/c/6b329393502e5857662b851a13f947209c588587