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CVE-2026-89528

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: svcrdma: Reject Read lists that exceed the page budget Individual Read segment lengths are validated at decode time, but nothin…

Published Sep 11, 2026EPSS 0.71%

Overview

CVE-2026-89528 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

svcrdma: Reject Read lists that exceed the page budget

Individual Read segment lengths are validated at decode time, but

nothing prevents a requester from sending multiple segments whose

cumulative length exceeds the rq_pages array budget. When one

segment fills the page array exactly, the runtime guard in

svc_rdma_build_read_segment() is bypassed because len reaches zero.

A subsequent segment then accesses the NULL sentinel slot at

rq_pages[rq_maxpages], resulting in a NULL pointer dereference during

DMA mapping.

Accumulate pages across all Read segments and reject the message at

decode time when the total would overflow the page budget.

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/08aa4162df91880a79be744aaa9570b04d4875c4Refgit.kernel.org/stable/c/0ca487abb3bdf581851664b5db21f364caf57682Refgit.kernel.org/stable/c/1a3af2262cb384112ef38632de4690682be528b4Refgit.kernel.org/stable/c/465f511f59a0fa7a80d5d1073c4b24f28ea38f58Refgit.kernel.org/stable/c/beb4e9801f6362436102acc4cc5304b7324f9365Refgit.kernel.org/stable/c/e70fdb121171c3eb0ac34eb545721828cd737717

How CyberStrike helps

Frequently asked questions

What is CVE-2026-89528?

CVE-2026-89528 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-89528?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-89528?

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-2026-89528?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-89528 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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