CVE-2026-74471

Local denial of service via stale trace event

Published Aug 15, 2026 · Updated Aug 15, 2026

Use-after-free in Linux kernel tracing 3.10 and later allows local users to crash the system through failed trace-event registration. trace_module_add_events() ignores an __register_event() failure and still creates a trace_event_file that retains a pointer into subsequently freed module memory. The trigger requires failed event initialization, failed module loading, and a later tracefs or tracing operation that dereferences the stale pointer.

CVSS severity7.8
High
EPSS probability0.13%
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 Linux kernel tracing 3.10 and later allows local users to crash the system through failed trace-event registration. trace_module_add_events() ignores an __register_event() failure and still creates a trace_event_file that retains a pointer into subsequently freed module memory. The trigger requires failed event initialization, failed module loading, and a later tracefs or tracing operation that dereferences the stale pointer.

The record

CVE
CVE-2026-74471
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-825, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=3.10
  2. Affected versionversion=ae63b31e4d0e2ec09c569306ea46f664508ef717 <000765dcdc3edf128990762790543adc4b868f6c
  3. Affected versionversion=ae63b31e4d0e2ec09c569306ea46f664508ef717 <22f954f7a8afe975e85517aff41b35defe05144b
  4. Affected versionversion=ae63b31e4d0e2ec09c569306ea46f664508ef717 <ac8719969e6c3c54e939834df812bc41f25453cf
  5. Affected versionversion=ae63b31e4d0e2ec09c569306ea46f664508ef717 <cbb5ed3be9cae70e1c12b1991009b4e12bf4a4ca
  6. Affected versionversion=ae63b31e4d0e2ec09c569306ea46f664508ef717 <d61ee2a27dfd5eb43ddc18af40168f5b9eb1cea5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.10; version=ae63b31e4d0e2ec09c569306ea46f664508ef717 <000765dcdc3edf128990762790543adc4b868f6c; version=ae63b31e4d0e2ec09c569306ea46f664508ef717 <22f954f7a8afe975e85517aff41b35defe05144b; version=ae63b31e4d0e2ec09c569306ea46f664508ef717 <ac8719969e6c3c54e939834df812bc41f25453cf; version=ae63b31e4d0e2ec09c569306ea46f664508ef717 <cbb5ed3be9cae70e1c12b1991009b4e12bf4a4ca; version=ae63b31e4d0e2ec09c569306ea46f664508ef717 <d61ee2a27dfd5eb43ddc18af40168f5b9eb1cea5

Published CVSS scores

7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8cve.orgCVSS: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-825Expired Pointer Dereference
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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