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CVE-2026-64102

kernel: RDMA/siw: Reject MPA FPDU length underflow before signed receive math

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · July 19, 2026

Updated · October 13, 2026

Description

A flaw was found in the Linux kernel's Soft-iWARP (siw) component for Remote Direct Memory Access (RDMA). A remote attacker can send a specially crafted iWARP Fast Path Data Unit (FPDU) with a manipulated length field. This manipulation causes an integer underflow, leading to a use-after-free vulnerability. Successful exploitation of this flaw could result in a system crash, leading to a Denial of Service (DoS).

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-825 · Expired Pointer Dereference