CVE-2026-93151Network attack vector

Kernel memory exhaustion via unreclaimed RDMA responses

Published Sep 17, 2026 · Updated Sep 18, 2026

Resource exhaustion in Linux allows remote authenticated users to exhaust kernel memory through crafted NVMe-over-RDMA traffic. During queue teardown with I/O in flight, a posted response can lose its send completion, so nvmet_rdma_send_done() and nvmet_rdma_release_rsp() never free its RDMA context and request SGLs. Repeated RDMA connects, queue-depth reads, and disconnects can accumulate these allocations until an out-of-memory condition terminates the NVMe target.

CVSS severity3.1
Low
EPSS probability0.67%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Linux allows remote authenticated users to exhaust kernel memory through crafted NVMe-over-RDMA traffic. During queue teardown with I/O in flight, a posted response can lose its send completion, so nvmet_rdma_send_done() and nvmet_rdma_release_rsp() never free its RDMA context and request SGLs. Repeated RDMA connects, queue-depth reads, and disconnects can accumulate these allocations until an out-of-memory condition terminates the NVMe target.

The record

CVE
CVE-2026-93151
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.8
  2. Affected versionversion=8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <0114dd303b373522dea06053aabae34bdd33a7c4
  3. Affected versionversion=8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <156ec10a8be2c33b0c279d8b2f4fe8e16fa89ef7
  4. Affected versionversion=8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <5cc3b21729d45b5af8f79891f9dedb7e6b6dbd08
  5. Affected versionversion=8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <91cfa74f1f3772e8c3662c064a45d8633e00c78e
  6. Affected versionversion=8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <9584b3c30e4ee8ca315bdc12249cc6c47cf1a482
  7. Affected versionversion=8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <ca795fc1d8a1a4ab0e6bd1d27c9adb78d4ed1a1c
  8. Affected versionversion=8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <d553a9dc1c45666e76d8d2ac9a4f8ff0cbf53a50

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <0114dd303b373522dea06053aabae34bdd33a7c4; version=8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <156ec10a8be2c33b0c279d8b2f4fe8e16fa89ef7; version=8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <5cc3b21729d45b5af8f79891f9dedb7e6b6dbd08; version=8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <91cfa74f1f3772e8c3662c064a45d8633e00c78e; version=8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <9584b3c30e4ee8ca315bdc12249cc6c47cf1a482; version=8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <ca795fc1d8a1a4ab0e6bd1d27c9adb78d4ed1a1c; version=8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <d553a9dc1c45666e76d8d2ac9a4f8ff0cbf53a50

Published CVSS scores

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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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