CVE-2026-97523— mptcp: close race between scheduler and state change
Quick assessment
Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 Linux 内核中，已修复以下漏洞： MPTCP（多路径 TCP）：调度器与状态变更之间存在竞争条件 MPTCP 调度器可能与子流套接字的状态变更发生竞争：在选定的套接字上可能发生数据传输失败，且后续的释放操作可能尝试使用 mss_now 重置为 0 的除数进行除法运算。 通过显式检查该关键场景来解决此问题。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 19
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | fb9c73ef2ac2ec816efdc8b9267bc04e1369c20b< d74b2e26b54a7dae1d87c1f19ae0d6db500e5e03 |
affected |
c886d70286bf3ad411eb3d689328a67f7102c6ae< 5883ae880f51edc4b1484e787473b865b6159ead |
affected | ||
c886d70286bf3ad411eb3d689328a67f7102c6ae< 0a926b5df8efdfbac07e2fb7fafb21849a2ad9c0 |
affected | ||
c886d70286bf3ad411eb3d689328a67f7102c6ae< 8f11430d51ff8365bc51b670bc3002b65ae4c6b7 |
affected | ||
c886d70286bf3ad411eb3d689328a67f7102c6ae< a09c87abf10a0a7e203137c75b5381aa63d9b31d |
affected | ||
c886d70286bf3ad411eb3d689328a67f7102c6ae< 4c856f3c151a2f3fa237caa651c44015916ca584 |
affected | ||
c886d70286bf3ad411eb3d689328a67f7102c6ae< 42064de57fb83231fcc89663a94885f228a1ee53 |
affected | ||
8caf5c15b5288d52d9c89374d6c10fa32ee84ec5 |
affected | ||
| … +11 more rows | |||
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I. Basic Information for CVE-2026-97523
Vulnerability Information
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Vulnerability Title
mptcp: close race between scheduler and state change
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
mptcp: close race between scheduler and state change
The mptcp scheduler may race with subflow sockets state change: data
transmission on the selected socket may fail and a later release could
try to use mss_now reset to 0 for a divide operation.
Address the issue by explicitly checking for the critical scenario.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-97523
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Patches & Fixes for CVE-2026-97523 (7)
Same Patch Batch · Linux · 2026-09-25 · 372 CVEs total
| CVE-2026-100075 | 9.8 CRITICAL | RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters |
| CVE-2026-97957 | 8.8 HIGH | net: hinic: fix mailbox segment buffer overflow |
| CVE-2026-97527 | 8.8 HIGH | scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock |
| CVE-2026-97528 | 8.8 HIGH | scsi: qla2xxx: Unlink NVMe unsol ctx before freeing on LS reject error |
| CVE-2026-97555 | 8.8 HIGH | smb: client: fix heap overflow in DACL owner/group rewrite |
| CVE-2026-98115 | 8.8 HIGH | ksmbd: safely drain sessions during logoff |
| CVE-2026-97525 | 8.2 HIGH | x86/mm/pat: Allocate split page tables as kernel page tables |
| CVE-2026-97573 | 8.1 HIGH | bnxt_en: Handle buffer allocation failure in bnxt_rx_ring_reset() |
| CVE-2026-97570 | 8.1 HIGH | bnxt_en: Bound SW TPA IDs to prevent crashes |
| CVE-2026-98070 | 8.1 HIGH | net/rds: acquire RDS_IN_XMIT in rds_tcp_reset_callbacks() |
| CVE-2026-98069 | 8.1 HIGH | net/rds: acquire the fastpath locks in rds_conn_shutdown() |
| CVE-2026-98130 | 8.1 HIGH | sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START |
| CVE-2026-97578 | 7.8 HIGH | media: verisilicon: rockchip: guard VPU981 AV1 divisor and tile buffer |
| CVE-2026-97548 | 7.8 HIGH | xfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions |
| CVE-2026-98052 | 7.8 HIGH | net: bcmasp: clear txcb->last before writing each descriptor |
| CVE-2026-97611 | 7.8 HIGH | net: openvswitch: fix use-after-free of the flow table mask array |
| CVE-2026-97612 | 7.8 HIGH | net: mpls: clear inner_protocol when the last label is popped |
| CVE-2026-98073 | 7.8 HIGH | net: Remove conflicting altnames for dying netns in __dev_change_net_namespace(). |
| CVE-2026-97602 | 7.8 HIGH | inet: frags: invalidate queues before flushing them |
| CVE-2026-98112 | 7.8 HIGH | ksmbd: fix listener task lifetime on netdev events |
Showing top 20 of 372 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions
Same vendor: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions
V. Comments for CVE-2026-97523
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