CVE-2026-13087 (GCVE-0-2026-13087)

Vulnerability from cvelistv5 – Published: 2026-09-22 16:51 – Updated: 2026-09-22 17:58
VLAI
Title
Kernel: heap out-of-bounds write in the linux kernel rpc-over-rdma server reply path...
Summary
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.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 17:58 UTC
CWE
Assigner
References
URL Tags
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
Impacted products
Date Public
2026-09-22 15:00
Credits
Red Hat would like to thank AISLE Research for reporting this issue.
Show details on NVD website
To clipboard 

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              "value": "This vulnerability requires the NFS/RDMA server to be running with CONFIG_SUNRPC_XPRT_RDMA enabled, which requires RDMA hardware (InfiniBand or RoCE). Systems that do not have RDMA hardware or do not export NFS over RDMA are not affected. If NFS/RDMA is not required, disabling or not loading the svcrdma kernel module prevents exploitation."
            }
          ],
          "x_generator": {
            "engine": "cvelib 1.8.0"
          },
          "x_redhatCweChain": "CWE-787: Out-of-bounds Write"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "assignerShortName": "redhat",
        "cveId": "CVE-2026-13087",
        "datePublished": "2026-09-22T16:51:42.042Z",
        "dateReserved": "2026-06-23T18:49:07.981Z",
        "dateUpdated": "2026-09-22T17:58:28.314Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.