CVE-2026-93107Network attack vector

Kernel crash and stream corruption via packet replay

Published Sep 17, 2026 · Updated Sep 18, 2026

Race condition in Linux kernel RDMA/rxe allows remote attackers to corrupt application streams and crash the host via RoCE traffic. In do_complete(), an error-state return sends an already completed packet back through check_resource() and send_data_in(), duplicating completions until a null receive work queue entry is dereferenced. Exploitation requires an established RoCEv2 reliable-connected queue pair and a disconnect or negative acknowledgment racing with receive completion; the result is repeated application delivery, stream corruption, and a kernel crash.

CVSS severity8.2
High
EPSS probability0.54%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Linux kernel RDMA/rxe allows remote attackers to corrupt application streams and crash the host via RoCE traffic. In do_complete(), an error-state return sends an already completed packet back through check_resource() and send_data_in(), duplicating completions until a null receive work queue entry is dereferenced. Exploitation requires an established RoCEv2 reliable-connected queue pair and a disconnect or negative acknowledgment racing with receive completion; the result is repeated application delivery, stream corruption, and a kernel crash.

The record

CVE
CVE-2026-93107
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

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=49dc9c1f0c7e396654a31a480328fffd902fa494 <0d37e2503efd1069a74be740eadf63ea17c96810
  2. Affected versionversion=49dc9c1f0c7e396654a31a480328fffd902fa494 <15ae32c4a3551c4c9da457370bdfdd65d171e512
  3. Affected versionversion=49dc9c1f0c7e396654a31a480328fffd902fa494 <399713f1f0eac641351c8ceaec0ab8244ddcf78c
  4. Affected versionversion=49dc9c1f0c7e396654a31a480328fffd902fa494 <62a4b48767e06fdd64548450fae2b1ffc6ff5d69
  5. Affected versionversion=49dc9c1f0c7e396654a31a480328fffd902fa494 <c319b986a88cedf600c4497cd7814a891b2f9e7c
  6. Affected versionversion=6.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=49dc9c1f0c7e396654a31a480328fffd902fa494 <0d37e2503efd1069a74be740eadf63ea17c96810; version=49dc9c1f0c7e396654a31a480328fffd902fa494 <15ae32c4a3551c4c9da457370bdfdd65d171e512; version=49dc9c1f0c7e396654a31a480328fffd902fa494 <399713f1f0eac641351c8ceaec0ab8244ddcf78c; version=49dc9c1f0c7e396654a31a480328fffd902fa494 <62a4b48767e06fdd64548450fae2b1ffc6ff5d69; version=49dc9c1f0c7e396654a31a480328fffd902fa494 <c319b986a88cedf600c4497cd7814a891b2f9e7c; version=6.4

Published CVSS scores

8.2Linux CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

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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