CVE-2025-39995

Kernel use-after-free via orphaned probe timer

Published Oct 15, 2025 · Updated Oct 15, 2025

Use-after-free in the Linux tc358743 media driver from 4.3 allows local users to trigger stale kernel memory access after probe failure. The probe cleanup path uses timer_delete() and cancel_delayed_work(), which can leave callbacks running against a freed tc358743_state object. Triggering requires a probe failure after timer initialization; published reproduction used device emulation and debugfs fault injection.

CVSS severity0.0
None
EPSS probability0.23%
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 tc358743 media driver from 4.3 allows local users to trigger stale kernel memory access after probe failure. The probe cleanup path uses timer_delete() and cancel_delayed_work(), which can leave callbacks running against a freed tc358743_state object. Triggering requires a probe failure after timer initialization; published reproduction used device emulation and debugfs fault injection.

The record

CVE
CVE-2025-39995
Published
Oct 15, 2025
Updated
Oct 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.3
  2. Affected versionversion=d32d98642de66048f9534a05f3641558e811bbc9 <228d06c4cbfc750f1216a3fd91b4693b0766d2f6
  3. Affected versionversion=d32d98642de66048f9534a05f3641558e811bbc9 <2610617effb4454d2f1c434c011ccb5cc7140711
  4. Affected versionversion=d32d98642de66048f9534a05f3641558e811bbc9 <3d17701c156579969470e58b3a906511f8bc018d
  5. Affected versionversion=d32d98642de66048f9534a05f3641558e811bbc9 <79d10f4f21a92e459b2276a77be62c59c1502c9d
  6. Affected versionversion=d32d98642de66048f9534a05f3641558e811bbc9 <f3f3f00bcabbd2ce0a77a2ac7a6797b8646bfd8b
  7. Affected versionversion=d32d98642de66048f9534a05f3641558e811bbc9 <f92181c0e13cad9671d07b15be695a97fc2534a3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.3; version=d32d98642de66048f9534a05f3641558e811bbc9 <228d06c4cbfc750f1216a3fd91b4693b0766d2f6; version=d32d98642de66048f9534a05f3641558e811bbc9 <2610617effb4454d2f1c434c011ccb5cc7140711; version=d32d98642de66048f9534a05f3641558e811bbc9 <3d17701c156579969470e58b3a906511f8bc018d; version=d32d98642de66048f9534a05f3641558e811bbc9 <79d10f4f21a92e459b2276a77be62c59c1502c9d; version=d32d98642de66048f9534a05f3641558e811bbc9 <f3f3f00bcabbd2ce0a77a2ac7a6797b8646bfd8b; version=d32d98642de66048f9534a05f3641558e811bbc9 <f92181c0e13cad9671d07b15be695a97fc2534a3

Published CVSS scores

0.0Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:N

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

No sourced classifications are available.

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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