CVE-2023-31081Public exploit

Local kernel crash via cleared mux pointer

Published Apr 24, 2023 · Updated Feb 4, 2025

NULL pointer dereference in the Linux kernel 6.2 vidtv test driver allows local users to crash the kernel through DVB feed teardown. vidtv_stop_streaming clears dvb->mux and then passes that NULL value to vidtv_mux_stop_thread, which dereferences the missing mux object. The flaw is reachable when the vidtv test driver is enabled and a local user can exercise its DVB device interface; the demonstrated result is a kernel oops and service interruption.

CVSS severity5.5
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel 6.2 vidtv test driver allows local users to crash the kernel through DVB feed teardown. vidtv_stop_streaming clears dvb->mux and then passes that NULL value to vidtv_mux_stop_thread, which dereferences the missing mux object. The flaw is reachable when the vidtv test driver is enabled and a local user can exercise its DVB device interface; the demonstrated result is a kernel oops and service interruption.

The record

CVE
CVE-2023-31081
Published
Apr 24, 2023
Updated
Feb 4, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/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 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 exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

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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