major vulnerability· requires attention

Affects the Linux kernel NFS/RDMA server path — core OS component used widely; enables remote kernel crash or potential code execution across enterprise systems.

Systems

CVE-2026-13087

8.8

High

EPSS 0.47%Patch available

Remote heap overflow in Linux RPC-over-RDMA NFS reply path

exploited

No known exploitation not in CISA KEV as of our last sync

fix

Patch available see the advisory in the references

likelihood

EPSS 0.47%

Published 22 Sept 2026Analysed here 23 Sept 2026

common questions

Is CVE-2026-13087 being exploited?

Not confirmed. CVE-2026-13087 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.47% probability of exploitation in the next 30 days.

How severe is CVE-2026-13087?

CVE-2026-13087 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2026-13087?

Yes. A fix has been recorded for CVE-2026-13087. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.

What does CVE-2026-13087 affect?

CVE-2026-13087 affects Linux kernel (net/sunrpc/xprtrdma), NFS servers using RPC-over-RDMA (RDMA-enabled), Affected Linux distributions (e.g., RHEL). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

What should I do about CVE-2026-13087?

Apply vendor kernel updates; block RDMA/NFS or disable RPC-over-RDMA until patched.

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

executive summary

technical analysis

affected

Linux kernel (net/sunrpc/xprtrdma)NFS servers using RPC-over-RDMA (RDMA-enabled)Affected Linux distributions (e.g., RHEL)

impact

Remote heap OOB write via crafted RPC-over-RDMA NFS request causing kernel crash (DoS) or potential kernel code execution/privilege escalation.

action required

Immediate action required

timeline

22 Sept 2026Published
23 Sept 2026Analysed by vulneraibility.com · 1 day later
30 Sept 2026CVE record last updated · 7 days later

how to fix

Remediation steps are tailored for users whose stack is affected. Add this technology to your stack to see the fix checklist.

references

NVD CVE.org CVE Details Source

sources

CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
NVD: CVSS and CPE data
FIRST EPSS: exploit probability and percentile
Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.

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