What is the CVSS score of CVE-2022-1924?

CVE-2022-1924 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Is there a public PoC exploit available for CVE-2022-1924?

Yes, a public proof-of-concept exploit is available for CVE-2022-1924. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2022-1924?

Within 7 days: Identify all affected systems and apply vendor patches promptly. If patching is delayed, consider network segmentation to limit exposure.

Debian Linux CVE-2022-1924

HIGH

Heap-based Buffer Overflow (CWE-122)

2022-07-19 secalert@redhat.com

Buffer Overflow Debian Debian Linux Gstreamer

7.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-122 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Heap buffer bounds checking MITRE ATT&CK 1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	Despite the high CVSS score of 7.8, the real-world risk profile is more nuanced. The CVSS vector (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) indicates local attack vector with required user interaction, meaning an attacker must trick a user into opening a malicious MKV file. The EPSS score of 0.06% (17th percentile) suggests relatively low exploitation likelihood in the wild. However, the availability of public proof-of-concept code on the GStreamer GitLab issue tracker increases the practical risk. The vulnerability is not listed in CISA's Known Exploited Vulnerabilities catalog, indicating no confirmed active exploitation. For organizations using GStreamer in automated media processing pipelines or untrusted content scenarios, this represents a higher priority issue due to potential for automated exploitation, while desktop users face lower risk assuming they only open trusted media files.
Exploit ScenarioDerived	An attacker creates a malicious MKV video file with specially crafted LZO-compressed data that triggers the integer overflow when processed by vulnerable GStreamer versions. When a user opens this file in a media player or an application processes it automatically, the overflow occurs during decompression, potentially causing application crash or memory corruption. Public proof-of-concept code is available on the GStreamer GitLab tracker, lowering the barrier for exploitation.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 17, 2026

A critical integer overflow vulnerability in the GStreamer multimedia framework's Matroska (MKV) demuxer can cause denial of service or potentially enable heap memory corruption when processing specially crafted MKV files with LZO compression. The vulnerability affects GStreamer versions prior to the patched releases and has been assigned a high CVSS score of 7.8, with proof-of-concept code publicly available. While the EPSS score indicates relatively low exploitation probability at 0.06%, the availability of public exploit code and the widespread use of GStreamer in multimedia applications makes this a significant concern for affected systems.

RemediationAI

Apply the available security patches immediately by upgrading GStreamer to the latest patched version as documented in the GitLab issue at https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1225. Debian users should install the security updates provided in DSA-5204 (https://www.debian.org/security/2022/dsa-5204) for Debian 11, or the corresponding LTS updates (https://lists.debian.org/debian-lts-announce/2022/08/msg00001.html) for Debian 10. As a temporary mitigation until patching is complete, consider implementing input validation to reject or quarantine MKV files using LZO compression, or process untrusted media files in isolated sandboxed environments to limit potential impact.

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Technical ContextAI · show details

The vulnerability resides in the matroskademux element of GStreamer, specifically in the LZO decompression function used when processing MKV container files. GStreamer is a widely-used open-source multimedia framework that provides a pipeline-based architecture for handling audio and video streams. The root cause is an integer overflow (CWE-122: Heap-based Buffer Overflow) that occurs during memory allocation calculations in the decompression routine. The impact varies depending on the underlying libc implementation and operating system capabilities - on systems where libc uses mmap for large memory allocations, the vulnerability typically results in a segmentation fault as the code attempts to write to unmapped memory. However, on systems without mmap support or using alternative libc implementations, the integer overflow can lead to heap memory corruption, potentially allowing attackers to overwrite adjacent heap structures.

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Severity by source

NVD PRIMARY 7.8 HIGH

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

PoC Detected

Mar 17, 2026 - 15:52 vuln.today

Public exploit code

CVE Published

Jul 19, 2022 - 20:15 nvd

HIGH 7.8

DescriptionCVE.org

DOS / potential heap overwrite in mkv demuxing using lzo decompression. Integer overflow in matroskademux element in lzo decompression function which causes a segfault, or could cause a heap overwrite, depending on libc and OS. Depending on the libc used, and the underlying OS capabilities, it could be just a segfault or a heap overwrite. If the libc uses mmap for large chunks, and the OS supports mmap, then it is just a segfault (because the realloc before the integer overflow will use mremap to reduce the size of the chunk, and it will start to write to unmapped memory). However, if using a libc implementation that does not use mmap, or if the OS does not support mmap while using libc, then this could result in a heap overwrite.

Executive ViewAI

Why It Matters

CVE-2022-1924 presents notable security risk, a heap-based buffer overflow vulnerability rated CVSS 7.8. Exploitation could allow attackers to corrupt memory, crash the application, or potentially execute arbitrary code. Proof-of-concept code is publicly available, increasing the risk of exploitation. Organizations should apply vendor updates when available and consider compensating controls in the interim.

Business Impact: High

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Enable ASLR and DEP where available; (2) Implement network segmentation; (3) Monitor for exploitation indicators.

Threat Intelligence Overview

EPSS Score

0.1%

Top 83% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC Yes

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

Poc

System Exposure· derived

Small

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +39

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.