Heap Out-of-Bounds Write Vulnerability in Linux Kernel's RPC-over-RDMA Server
CVE-2026-13087

8.8HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
22 September 2026

What is CVE-2026-13087?

A heap out-of-bounds write vulnerability exists in the Linux kernel's RPC-over-RDMA server reply path. This vulnerability allows an attacker to send a specially crafted NFS READ request, which can induce the server to linearize multiple pages of reply data into a fixed-size heap buffer without performing proper bounds checking. Consequently, this improper handling can lead to a kernel heap overflow, potentially causing a denial of service through a system crash or allowing an attacker to execute arbitrary code via the corruption of nearby kernel heap objects.

References

https://access.redhat.com/security/cve/CVE-2026-13087
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2470788
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank AISLE Research for reporting this issue.
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