Affects the Linux kernel NFS/RDMA server path — core OS component used widely; enables remote kernel crash or potential code execution across enterprise systems.
CVE-2026-13087
Remote heap overflow in Linux RPC-over-RDMA NFS reply path
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 0.68% 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.
Remote heap OOB write via crafted RPC-over-RDMA NFS request causing kernel crash (DoS) or potential kernel code execution/privilege escalation.
Immediate action required