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CVE-2026-74345: RDMA/siw: Fix endpoint/socket association handling

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Fix endpoint/socket association handling Disassociating a socket from an endpoint via siw_socket_disassoc() may release the last reference on that endpoint and free it. Therefore, don't clear the endpoints socket pointer after calling that function, but within. This fixes a: BUG: KASAN: slab-use-after-free in siw_cm_work_handler (drivers/infiniband/sw/siw/siw_cm.c:1053 drivers/infiniband/sw/siw/siw_cm.c:1075) which occurred after processing a malformed MPA request during connection establishment, causing the new endpoint to be closed.

Affected products

• Linux: 5.3 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/b28d513393f81e2de00f82970487a9d001557e4e
• https://git.kernel.org/stable/c/b6cf763eee0a932792bef64ceaca568d324192fc
• https://git.kernel.org/stable/c/ea4f6f6c53577fb3f05dbd78b15e586772d49831
• https://git.kernel.org/stable/c/f27da1192118fb6a7e73a85cfe4b02ccf8298619
• https://git.kernel.org/stable/c/f6183983ce1ff254d629a333739082b39d7c5eb6
• https://git.kernel.org/stable/c/ff584d3735b13a1d7f8cd072f98fea40b6062518

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