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CVE-2026-90294

kernel: IB/isert: delay the final Login Response until the session is registered

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · September 17, 2026

Updated · October 30, 2026

Description

A flaw was found in the Linux kernel. The iSER (iSCSI Extensions for RDMA) protocol implementation incorrectly sends a login response before the session is fully registered. A remote attacker could exploit this by sending a SCSI command immediately after receiving the premature login response. This could lead to a null pointer dereference, causing a system crash and 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-476 · NULL Pointer Dereference