What is CVE-2026-13087?

CVE-2026-13087 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10, classified as a Out-of-bounds Write flaw (CWE-787). CVE-2026-13087 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-13087?

CVE-2026-13087 has a CVSS score of 8.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-13087?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2026-13087 patch availability.

Is CVE-2026-13087 actively exploited?

CVE-2026-13087 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Out-of-bounds Write (CWE-787)?

The product writes data past the end or before the beginning of the intended buffer. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/787.html

CVE-2026-13087

High

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.

Package Linux Kernel

Published 2026-09-22

Last modified 2026-09-22

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

8.8

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-787

CVE-2026-13087 is a Out-of-bounds Write vulnerability

What is Out-of-bounds Write?

The product writes data past the end or before the beginning of the intended buffer. Learn more on MITRE CWE

References

2 total

Details

CVE ID CVE-2026-13087

Severity High

CVSS score 8.8 / 10

CVSS version 3.1

Published 2026-09-22

Modified 2026-09-22

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2026-13087?

CVE-2026-13087 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 , classified as an Out-of-bounds Write flaw (CWE-787) . CVE-2026-13087 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-13087?

CVE-2026-13087 has a CVSS score of 8.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-13087?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2026-13087 patch availability.
Is CVE-2026-13087 actively exploited?

No. CVE-2026-13087 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.