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CVE-2026-13087

📛 CVE Title

Kernel: heap out-of-bounds write in the linux kernel rpc-over-rdma server reply path...

Description

A heap out-of-bounds write vulnerability was found in the Linux kernel's RPC-over-RDMA server reply path in net/sunrpc/xprtrdma/svc_rdma_sendto.c. When a crafted RPC-over-RDMA client sends a large NFS READ request with an empty Write list and no Reply chunk, the server linearizes the entire multi-page reply into a fixed-size 4096-byte heap buffer without bounds checking, resulting in a kernel heap overflow. This can lead to denial of service via kernel crash or potential code execution through corruption of adjacent kernel heap objects.

Overview

State
PUBLISHED
Assigner (CNA)
redhat
CVSS severity
HIGH
CVSS score
CVSS 8.8 / 10 8.8 8.8 / 10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Effective score
8.8 / 10 HIGH source: CNA overview
CWE(s)
CWE-787
Reserved
2026-06-23
Published
2026-09-22 16:51 UTC
Last updated
2026-09-22 17:58 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/13xxx/CVE-2026-13087.json
Linked Threat
CVE-2026-13087 — Kernel: heap out-of-bounds write in the linux kernel rpc-over-rdma server reply path...

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-09-22 17:17:23 UTC
NVD last modified
2026-09-22 19:37:36 UTC
NVD CVSS v3.1
CVSS 8.8 / 10 8.8 8.8 / 10 HIGH source: secalert@redhat.com
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore
2.8 / 10
Impact subscore
5.9 / 10

NVD / KEV / EPSS data refreshed 2026-09-23 01:43 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-84560
Assigner
redhat
Published
Sep 22, 2026, 4:51:42 PM
Updated
Sep 22, 2026, 5:58:28 PM
EUVD base score (CVSS 3.1)
8.8 / 10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EUVD-reported EPSS
0.0000
Aliases
GHSA-pcc4-cf48-99jw

ENISA description: A heap out-of-bounds write vulnerability was found in the Linux kernel's RPC-over-RDMA server reply path in net/sunrpc/xprtrdma/svc_rdma_sendto.c. When a crafted RPC-over-RDMA client sends a large NFS READ request with an empty Write list and no Reply chunk, the server linearizes the entire multi-page reply into a fixed-size 4096-byte heap buffer without bounds checking, resulting in a kernel heap overflow. This can lead to denial of service via kernel crash or potential code execution through corruption of adjacent kernel heap objects.

EUVD references (2)

Affected products (9)

VendorProductVersionsPlatforms
Red Hat Red Hat Enterprise Linux 10 — —
Red Hat Red Hat Enterprise Linux 6 — —
Red Hat Red Hat Enterprise Linux 7 — —
Red Hat Red Hat Enterprise Linux 7 — —
Red Hat Red Hat Enterprise Linux 8 — —
Red Hat Red Hat Enterprise Linux 8 — —
Red Hat Red Hat Enterprise Linux 9 — —
Red Hat Red Hat Enterprise Linux 9 — —
Red Hat Red Hat Enterprise Linux for NVIDIA 26 — —

Vendor references (2)

References embedded in the original CVE record by the assigning CNA.

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (3)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

  • web:access.redhat.com

    Security Updates

    2026-09-23 15:20 UTC
  • web:cvebrief.com

    Remediation Immediate Action: Monitor the Red Hat Security Advisory portal for the release of kernel patches addressing CVE-2026-13087 and deploy them to all affected systems immediately upon availability.

    2026-09-23 15:20 UTC
  • web:itknowledgebases.com

    Export to CSV for reporting, ticketing, or patch prioritization workflows. What Is a CVE Advisory? A CVE (Common Vulnerabilities and Exposures) advisory is a public disclosure of a security vulnerability assigned a unique identifier by MITRE. Advisories include severity scores (CVSS), affected versions, and remediation guidance.

    2026-09-23 15:20 UTC
  • web:msrc.microsoft.com

    The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

    2026-09-23 15:20 UTC
  • web:msrc.microsoft.com

    Security Update Guide - Microsoft Security Response Center

    2026-09-23 15:20 UTC
  • web:senserva.com

    Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

    2026-09-23 15:20 UTC
  • web:support.microsoft.com

    Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2016. It doesn't apply to the Office 2016 Click-to-Run editions, such as Microsoft Office 365 Home. (See What version of Office am I using?) How to get and install the update Method 1: Microsoft Update This update is available from Microsoft Update. When you turn on ...

    2026-09-23 15:20 UTC
  • web:support.servicenow.com

    Due to additional analysis provided by the security researcher who discovered CVE - 2026 -6876, we have upgraded the severity rating of CVE - 2026 -6876 from High to Critical. This change affects only the severity

    2026-09-23 15:20 UTC
  • web:vulmon.com

    Vulnerability Summary A heap out-of-bounds write vulnerability exists in the Linux kernel's RPC-over-RDMA server reply path. Crafted RPC-over-RDMA client requests with an empty Write list and no Reply chunk can cause the server to write data beyond a 4096-byte heap buffer without checking boundaries. This kernel heap overflow may lead to denial of service through a kernel crash or potential ...

    2026-09-23 15:20 UTC
  • web:www.veeam.com

    When a vulnerability is identified, our team promptly develops a patch to address and mitigate the risk. In line with our dedication to transparency, we publicly disclose the vulnerability and provide detailed mitigation information.

    2026-09-23 15:20 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-13087.json.

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