Description
A NULL pointer dereference in the AP4_AtomSampleTable::GetSample() function of Aleksoid1978 MPC-BE before commit 4341cb3 allows attackers to cause a Denial of Service (DoS) via a crafted MP4 file.
Published: 2026-07-01
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A NULL pointer dereference occurs in the AP4_AtomSampleTable::GetSample() function of the MPC‑BE media player. The missing null check triggers a crash when parsing a malformed MP4 file, leading to a denial of service. The weakness is classified as CWE‑476 and results only in playback interruption.

Affected Systems

The issue affects all releases of MPC‑BE built before commit 4341cb3. Users running those builds who encounter or intentionally process maliciously crafted MP4 files are vulnerable. No other vendors or product families are known to be impacted.

Risk and Exploitability

The EPSS score is below 1 % and the CVSS score is 7.5, indicating a high severity but low likelihood of exploitation. The likely attack vector is local file handling: attackers need to supply a crafted MP4 file; no privileged escalation or data exposure is required. Because the vulnerability can only cause service interruption, the overall risk is moderate and it is not listed in CISA’s KEV catalog.

Generated by OpenCVE AI on July 31, 2026 at 15:43 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade MPC‑BE to a build that includes commit 4341cb3 or later.
  • Disable MP4 playback in MPC‑BE if you play MP4 files from untrusted or unknown sources.
  • Run MPC‑BE in a sandboxed environment.

Generated by OpenCVE AI on July 31, 2026 at 15:43 UTC.

Tracking

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Advisories

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History

Fri, 31 Jul 2026 16:00:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference in MPC‑BE Causing Denial of Service

Wed, 29 Jul 2026 16:15:00 +0000

Type Values Removed Values Added
First Time appeared Aleksoid1978
Aleksoid1978 mpc-be
Vendors & Products Aleksoid1978
Aleksoid1978 mpc-be

Mon, 27 Jul 2026 02:15:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference in MPC-BE MP4 Parser Causes Denial of Service

Wed, 22 Jul 2026 15:00:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference in MPC-BE MP4 Parser Causes Denial of Service

Fri, 17 Jul 2026 13:45:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference in MPC‑BE Causing Denial of Service

Wed, 15 Jul 2026 23:15:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference in MPC‑BE Causing Denial of Service

Tue, 14 Jul 2026 00:45:00 +0000

Type Values Removed Values Added
Title Null Pointer Dereference in MPC‑BE Causes MP4 File Denial of Service

Sun, 12 Jul 2026 21:00:00 +0000

Type Values Removed Values Added
Title Null Pointer Dereference in MPC‑BE Causes MP4 File Denial of Service

Sun, 12 Jul 2026 02:15:00 +0000

Type Values Removed Values Added
Title MP4 Parser Null Dereference in MPC‑BE Causes DoS

Sat, 11 Jul 2026 02:15:00 +0000

Type Values Removed Values Added
Title MP4 Parser Null Dereference in MPC‑BE Causes DoS

Thu, 09 Jul 2026 21:00:00 +0000

Type Values Removed Values Added
Title NULL pointer dereference in MP4 playback causes DoS

Thu, 09 Jul 2026 07:15:00 +0000

Type Values Removed Values Added
Title NULL pointer dereference in MP4 playback causes DoS

Wed, 08 Jul 2026 19:15:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference in MPC‑BE's MP4 Parsing Causes Denial of Service

Wed, 08 Jul 2026 03:00:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference in MPC‑BE's MP4 Parsing Causes Denial of Service

Tue, 07 Jul 2026 15:30:00 +0000

Type Values Removed Values Added
Title Null Pointer Dereference in MP4 Sample Table Causes Denial of Service

Tue, 07 Jul 2026 03:30:00 +0000

Type Values Removed Values Added
Title Null Pointer Dereference in MP4 Sample Table Causes Denial of Service

Mon, 06 Jul 2026 15:45:00 +0000

Type Values Removed Values Added
Title Null Pointer Dereference in MPC‑BE MP4 Parsing Causes DoS

Mon, 06 Jul 2026 03:15:00 +0000

Type Values Removed Values Added
Title Null Pointer Dereference in MPC‑BE MP4 Parsing Causes DoS

Sun, 05 Jul 2026 19:15:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference Leading to Denial of Service in MPC‑BE Media Player

Sun, 05 Jul 2026 11:15:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference Leading to Denial of Service in MPC‑BE Media Player

Sat, 04 Jul 2026 22:45:00 +0000

Type Values Removed Values Added
Title Null Pointer Dereference in MPC‑BE Leading to Denial of Service via Malicious MP4

Sat, 04 Jul 2026 11:30:00 +0000

Type Values Removed Values Added
Title Null Pointer Dereference in MPC‑BE Leading to Denial of Service via Malicious MP4

Sat, 04 Jul 2026 07:15:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference Resulting in DoS via Crafted MP4 File in MPC-BE

Fri, 03 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference Resulting in DoS via Crafted MP4 File in MPC-BE

Fri, 03 Jul 2026 05:00:00 +0000

Type Values Removed Values Added
Title Null Pointer Dereference in MP4 Parsing Causing Denial of Service

Thu, 02 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
Title Null Pointer Dereference in MP4 Parsing Causing Denial of Service

Thu, 02 Jul 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-476
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 02 Jul 2026 11:00:00 +0000

Type Values Removed Values Added
Title Null Pointer Dereference in MPC‑BE Causing Denial of Service via Malformed MP4
Weaknesses CWE-476

Thu, 02 Jul 2026 04:15:00 +0000

Type Values Removed Values Added
Title Null Pointer Dereference in MPC‑BE Causing Denial of Service via Malformed MP4
Weaknesses CWE-476

Wed, 01 Jul 2026 21:45:00 +0000

Type Values Removed Values Added
Description A NULL pointer dereference in the AP4_AtomSampleTable::GetSample() function of Aleksoid1978 MPC-BE before commit 4341cb3 allows attackers to cause a Denial of Service (DoS) via a crafted MP4 file.
References

Subscriptions

Aleksoid1978 Mpc-be
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-07-02T13:02:22.870Z

Reserved: 2026-04-06T00:00:00.000Z

Link: CVE-2026-36912

cve-icon Vulnrichment

Updated: 2026-07-02T13:02:17.662Z

cve-icon NVD

Status : Deferred

Published: 2026-07-01T22:16:48.827

Modified: 2026-07-02T17:42:23.640

Link: CVE-2026-36912

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-31T15:45:10Z

Weaknesses