CVE-2025-38024

Kernel use-after-free via duplicate CQ cleanup

Published Jun 18, 2025 · Updated Aug 5, 2026

Use-after-free in the Linux kernel RDMA/rxe subsystem allows local users to trigger an invalid kernel-memory read during CQ creation. When rxe_cq_from_init fails, it frees memory before rxe_create_cq invokes rxe_cleanup, causing rxe_queue_cleanup to access the same freed resources. Access to RDMA user verbs and a failing completion-queue initialization path is required; the documented result is a KASAN-detected invalid read.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel RDMA/rxe subsystem allows local users to trigger an invalid kernel-memory read during CQ creation. When rxe_cq_from_init fails, it frees memory before rxe_create_cq invokes rxe_cleanup, causing rxe_queue_cleanup to access the same freed resources. Access to RDMA user verbs and a failing completion-queue initialization path is required; the documented result is a KASAN-detected invalid read.

The record

CVE
CVE-2025-38024
Published
Jun 18, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=4.8
  2. Affected versionversion=8700e3e7c4857d28ebaa824509934556da0b3e76 <16c45ced0b3839d3eee72a86bb172bef6cf58980
  3. Affected versionversion=8700e3e7c4857d28ebaa824509934556da0b3e76 <336edd6b0f5b7fbffc3e065285610624f59e88df
  4. Affected versionversion=8700e3e7c4857d28ebaa824509934556da0b3e76 <3a3b73e135e3bd18423d0baa72571319c7feb759
  5. Affected versionversion=8700e3e7c4857d28ebaa824509934556da0b3e76 <52daccfc3fa68ee1902d52124921453d7a335591
  6. Affected versionversion=8700e3e7c4857d28ebaa824509934556da0b3e76 <7c7c80c32e00665234e373ab03fe82f5c5c2c230
  7. Affected versionversion=8700e3e7c4857d28ebaa824509934556da0b3e76 <ee4c5a2a38596d548566560c0c022ab797e6f71a
  8. Affected versionversion=8700e3e7c4857d28ebaa824509934556da0b3e76 <f81b33582f9339d2dc17c69b92040d3650bb4bae
  9. Affected versionversion=8700e3e7c4857d28ebaa824509934556da0b3e76 <f8f470e3a757425a8f98fb9a5991e3cf62fc7134

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=8700e3e7c4857d28ebaa824509934556da0b3e76 <16c45ced0b3839d3eee72a86bb172bef6cf58980; version=8700e3e7c4857d28ebaa824509934556da0b3e76 <336edd6b0f5b7fbffc3e065285610624f59e88df; version=8700e3e7c4857d28ebaa824509934556da0b3e76 <3a3b73e135e3bd18423d0baa72571319c7feb759; version=8700e3e7c4857d28ebaa824509934556da0b3e76 <52daccfc3fa68ee1902d52124921453d7a335591; version=8700e3e7c4857d28ebaa824509934556da0b3e76 <7c7c80c32e00665234e373ab03fe82f5c5c2c230; version=8700e3e7c4857d28ebaa824509934556da0b3e76 <ee4c5a2a38596d548566560c0c022ab797e6f71a; version=8700e3e7c4857d28ebaa824509934556da0b3e76 <f81b33582f9339d2dc17c69b92040d3650bb4bae; version=8700e3e7c4857d28ebaa824509934556da0b3e76 <f8f470e3a757425a8f98fb9a5991e3cf62fc7134

Published CVSS scores

7.8GitHub Advisory DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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