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CVE-2026-23384

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: RDMA/ionic: Fix kernel stack leak in ionic_create_cq() struct ionic_cq_resp resp { __u32 cqid[2]; // offset 0 - PAR…

Published Mar 25, 2026CWE-401EPSS 0.11%

Overview

CVE-2026-23384 is a medium-severity vulnerability. It was published on March 25, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

RDMA/ionic: Fix kernel stack leak in ionic_create_cq()

struct ionic_cq_resp resp {

__u32 cqid[2]; // offset 0 - PARTIALLY SET (see below)

__u8 udma_mask; // offset 8 - SET (resp.udma_mask = vcq->udma_mask)

__u8 rsvd[7]; // offset 9 - NEVER SET <- LEAK

};

rsvd[7]: 7 bytes of stack memory leaked unconditionally.

cqid[2]: The loop at line 1256 iterates over udma_idx but skips indices

where !(vcq->udma_mask & BIT(udma_idx)). The array has 2 entries but

udma_count could be 1, meaning cqid[1] might never be written via

ionic_create_cq_common(). If udma_mask only has bit 0 set, cqid[1] (4

bytes) is also leaked. So potentially 11 bytes leaked.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/547d0b07ad73915b323bc21f85c5d3252bebbbcfRefgit.kernel.org/stable/c/a6f3e0fa8e862f220c26c2f27e5ddc42eb82ad3eRefgit.kernel.org/stable/c/faa72102b178c7ae6c6afea23879e7c84fc59b4e

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23384?

CVE-2026-23384 is a medium-severity vulnerability. It was published on March 25, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-23384?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-23384?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-23384?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23384 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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