RDMA/siw: Fix endpoint/socket association handling (CVE-2026-74345) | HOL Guard CVE

Critical · CVSS 9.8CVE-2026-74345

RDMA/siw: Fix endpoint/socket association handling

Answer in brief

CVE-2026-74345 records a Critical severity (CVSS 9.8) vulnerability in RDMA/siw: Fix endpoint/socket association handling. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 15, 2026Updated Aug 17, 2026Source checked Sep 29, 2026First seen by HOL Aug 15, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <b28d513393f81e2de00f82970487a9d001557e4e \|\| >=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <f6183983ce1ff254d629a333739082b39d7c5eb6 \|\| >=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <b6cf763eee0a932792bef64ceaca568d324192fc \|\| >=6c52fdc244b5ccc468006fd65a504d4ee33743c7 <ea4f6f6c53577fb3f05dbd78b15e586772d49831	b28d513393f81e2de00f82970487a9d001557e4e, f6183983ce1ff254d629a333739082b39d7c5eb6, b6cf763eee0a932792bef64ceaca568d324192fc, ea4f6f6c53577fb3f05dbd78b15e586772d49831
Linux/Linuxgeneric	5.3	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to b28d513393f81e2de00f82970487a9d001557e4e if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 15, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.