CVE-2026-98361
kernel: RDMA/rxe: Restore HMM_PFN_WRITE check in ODP write paths
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 6, 2026
Updated · October 7, 2026
Description
A flaw was found in the Linux kernel's RDMA over Converged Ethernet (rxe) driver. This flaw allows a local attacker to achieve privilege escalation by overwriting arbitrary read-only files. Missing write permission checks during On-Demand Paging (ODP) operations allow an unprivileged user to map memory over read-only file mappings. Incoming Remote Direct Memory Access (RDMA) write traffic can then modify cached file pages without breaking copy-on-write protections.
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 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-281 · Improper Preservation of Permissions