CVE-2026-90292

RDMA/siw: Fix use-after-free in siw_accept()

State: Published
Severity: 7.8 High
Published: Sep 17, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

RDMA/siw: Fix use-after-free in siw_accept()

siw_accept() looks up the QP supplied by userspace. If that QP is already in RTS, the function jumps to error cleanup before associating the incoming CEP with it.

The cleanup tests whether qp->cep is non-NULL and assumes the current call installed the association. However, qp->cep can point to the CEP of an existing connection. The cleanup then drops a reference from the incoming cep, not qp->cep. Once the incoming endpoint loses its remaining references, this can free it before the subsequent cep->qp store, causing a use-after-free. It also clears the existing QP association.

Only release the association reference when qp->cep is the incoming CEP. This preserves an existing association and avoids accessing the freed endpoint.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before d57db36e74cca4763e1c2c0c6eb9f84d19813879Affected 6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before 59de5502f32895ffe9c45530327ed997b90fdf06Affected 6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before a89d120615e711ce8fce551fd291c2f387666735Affected 6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before b9e7d3d9fdb2bfcfb25d93529fdf766536b37c78Affected 6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before 8f286a8094ee32c415f9ecd2c20765beb8a18c79Affected 6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before de603f01d9ccf823e575b013ffd86ebedca9a8c5Affected 6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before 561651d6a15588cee2040755f253faca2463415cAffected 6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before a9394971825933074032794a5feee5211509c774Affected
LinuxLinux	5.3Affected before 5.3Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before d57db36e74cca4763e1c2c0c6eb9f84d19813879Affected
6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before 59de5502f32895ffe9c45530327ed997b90fdf06Affected
6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before a89d120615e711ce8fce551fd291c2f387666735Affected
6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before b9e7d3d9fdb2bfcfb25d93529fdf766536b37c78Affected
6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before 8f286a8094ee32c415f9ecd2c20765beb8a18c79Affected
6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before de603f01d9ccf823e575b013ffd86ebedca9a8c5Affected
6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before 561651d6a15588cee2040755f253faca2463415cAffected
6c52fdc244b5ccc468006fd65a504d4ee33743c7 to before a9394971825933074032794a5feee5211509c774Affected

LinuxLinux

5.3Affected
before 5.3Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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