CVE-2025-38287Network attack vector

Remote system crash via IB/cm message race

Published Jul 10, 2025 · Updated Aug 5, 2026

A race in Linux kernel IB/cm 6.13 through 6.15.2 allows remote attackers to trigger a kernel warning through RDMA CM traffic. The send completion handler can free an older private message after cm_id has advanced, while cm_free_priv_msg() checks the current message and emits WARN. Exposure requires a reachable in-kernel RDMA listener; the warning becomes a system crash when panic_on_warn is enabled, with no reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race in Linux kernel IB/cm 6.13 through 6.15.2 allows remote attackers to trigger a kernel warning through RDMA CM traffic. The send completion handler can free an older private message after cm_id has advanced, while cm_free_priv_msg() checks the current message and emits WARN. Exposure requires a reachable in-kernel RDMA listener; the warning becomes a system crash when panic_on_warn is enabled, with no reported data disclosure or modification.

The record

CVE
CVE-2025-38287
Published
Jul 10, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=1e5159219076ddb2e44338c667c83fd1bd43dfef <7590649ee7af381a9d1153143026dec124c5798e
  2. Affected versionversion=1e5159219076ddb2e44338c667c83fd1bd43dfef <fc096a0cd2017cb0aa1e7fb83131410af9283910
  3. Affected versionversion=6.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1e5159219076ddb2e44338c667c83fd1bd43dfef <7590649ee7af381a9d1153143026dec124c5798e; version=1e5159219076ddb2e44338c667c83fd1bd43dfef <fc096a0cd2017cb0aa1e7fb83131410af9283910; version=6.13

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.7UbuntuCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5Linux CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application 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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