CVE intelligence

CVE-2026-74394

Vulnerability intelligence

Published Aug 15, 2026Sources checked Nov 10, 2026

9.8CRITICALCVSS out of 10

What this means

Review the available evidence

CVE-2026-74394 and is rated Critical severity with a CVSS score of 9.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Ubuntu Security Notices guidance

Vendor revision: Nov 10, 2026

Vendor remediation details

This update corrects flaws in the following subsystems: - HID subsystem; - InfiniBand drivers; - Network drivers; - PCI subsystem; - SCSI subsystem; - JFS file system; - Network file system (NFS) client; - OCFS2 file system; (CVE-2022-49082, CVE-2025-39730, CVE-2025-39743, CVE-2025-39783, CVE-2025-39810, CVE-2025-39824, CVE-2026-74350, CVE-2026-74394)

Ubuntu Security Notices guidance

Vendor revision: Nov 10, 2026

This update corrects flaws in the following subsystems: - HID subsystem; - InfiniBand drivers; - Network drivers; - PCI subsystem; - JFS file system; - OCFS2 file system; (CVE-2025-39743, CVE-2025-39783, CVE-2025-39810, CVE-2025-39824, CVE-2026-74350, CVE-2026-74394)

Ubuntu Security Notices guidance

Vendor revision: Oct 2, 2026

Vendor remediation details

This update corrects flaws in the following subsystems: - ARM64 architecture; - S390 architecture; - x86 architecture; - DRBD Distributed Replicated Block Device drivers; - InfiniBand drivers; - IOMMU subsystem; - Multiple devices driver; - Network drivers; - Microsoft Azure Network Adapter (MANA) driver; - NVME drivers; - TCM subsystem; - Virtio Host (VHOST) subsystem; - Xen hypervisor drivers; - AFS file system; - File systems infrastructure; - Network file systems library; - Network file system (NFS) client; - NTFS3 file system; - OCFS2 file system; - OrangeFS file system; - SMB network file system; - IPv4 networking; - Sun RPC protocol; - IPv6 networking; - IP tunnels definitions; - Netfilter; - TCP network protocol; - Locking primitives; - 9P file system network protocol; - B.A.T.M.A.

CISA KEVNot listedBased on the latest collected catalog

EPSS0.5%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-74394?

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

RDMA/srpt: fix integer overflow in immediate data length check

imm_buf->len is a user-controlled uint32_t received from the network. Adding it to imm_data_offset without overflow checking allows a malicious initiator to send len=0xFFFFFFFF, causing req_size to wrap around to a small value, bypassing the bounds check, and subsequently passing a ~4GB length to sg_init_one().

Use check_add_overflow() to detect wrapping before the comparison.

Source: NVD