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CVE-2026-46325

kernel: RDMA/rxe: Fix iova-to-va conversion for MR page sizes != PAGE_SIZE

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · June 9, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel's Remote Direct Memory Access (RDMA) subsystem, specifically within the rxe component. This vulnerability arises from an incorrect conversion of I/O Virtual Addresses (iova) to Virtual Addresses (va) when Memory Regions (MRs) have page sizes that differ from the system's PAGE_SIZE. An attacker could potentially exploit this flaw to cause incorrect memory access, which may lead to system instability or a kernel panic, resulting in 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-823 · Use of Out-of-range Pointer Offset