Gstreamer CVE-2025-47807

MEDIUM

NULL Pointer Dereference (CWE-476)

2025-08-07 cve@mitre.org

Denial Of Service Red Hat Gstreamer Suse

5.5

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-476 OWASP Top 10:2025 A10:2025 - Mishandling of Exceptional Conditions ASVS 5.0 V16 - Security Logging and Error Handling Null pointer safety, defensive checks MITRE ATT&CK 1 technique across 1 tactic: Impact 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	While the CVSS score of 5.5 indicates a moderate vulnerability with high availability impact (CWE-476 crashes are denial-of-service), the broader risk context suggests lower real-world priority. The EPSS score of 0.03% (7th percentile) indicates minimal likelihood of exploitation in the wild, contradicting the availability of public proof-of-concept code. The attack vector is local (AV:L) and requires user interaction (UI:R), meaning remote attackers cannot exploit this directly—a user must be socially engineered or tricked into opening a malicious subtitle file. The low EPSS despite public POC availability suggests either very limited attacker interest or difficulty in weaponizing the vulnerability in practice. Using SSVC framing: exploitation is PoC-available (reducing uncertainty), technical impact is denial-of-service (not integrity/confidentiality), and automatable impact is low since interaction is required. This is a real but low-priority vulnerability suitable for routine patching cycles rather than emergency response.
Exploit ScenarioDerived	An attacker crafts a malicious SubRip subtitle file (.srt) with specially formatted escape sequences designed to trigger a NULL pointer dereference in the subrip_unescape_formatting function. The attacker distributes this file via email, a malicious website, or a third-party subtitle repository. A victim downloads the subtitle file and attempts to use it with a GStreamer-based media player (such as GNOME Videos, Totem, or Kodi), causing the application to crash when the subparse plugin attempts to parse the malicious formatting. While a public proof-of-concept exists demonstrating the crash, the low EPSS score and local attack vector limitation suggest this is primarily a nuisance denial-of-service rather than a vector for widespread automated exploitation.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 17, 2026

A NULL pointer dereference vulnerability exists in GStreamer's subparse plugin, specifically in the subrip_unescape_formatting function, which can crash applications when processing maliciously crafted or malformed subtitle files. GStreamer versions through 1.26.1 are affected, and the vulnerability is exploitable through local attack vectors requiring user interaction to open a subtitle file. A public proof-of-concept is available, though the low EPSS score of 0.03% (7th percentile) suggests limited real-world exploitation likelihood despite the availability of exploit code.

RemediationAI

Upgrade GStreamer to a version newer than 1.26.1 once a patched release is available from the GStreamer project. Check https://gstreamer.freedesktop.org/security/ and https://gstreamer.freedesktop.org/releases/ for the latest stable release that addresses CVE-2025-47807. As an interim measure before patches are deployed, restrict access to untrusted subtitle files by educating users not to open SubRip files from unknown sources, and consider using application sandboxing or containerization (such as Flatpak for GStreamer-based applications) to limit crash impact to isolated processes. For environments where GStreamer is embedded in servers or automated systems, implement file validation and integrity checks to reject malformed subtitle files before parsing.

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Technical ContextAI · show details

GStreamer (cpe:2.3:a:gstreamer:gstreamer:*:*:*:*:*:*:*:*) is a multimedia framework that processes various audio and video formats, including subtitle formats like SubRip. The subparse plugin specifically handles subtitle parsing and formatting. The vulnerability is classified as CWE-476 (NULL Pointer Dereference), a memory safety defect where the subrip_unescape_formatting function fails to validate pointer validity before dereferencing it during subtitle file parsing. This occurs when the function encounters unexpected input structures in SubRip subtitle files, causing it to attempt to access memory at a NULL address, resulting in a denial-of-service condition through application crash.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.5 MEDIUM

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

SUSE MEDIUM

Red Hat 5.6 MEDIUM

Primary rating from NVD.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

3

Patch released

Apr 06, 2026 - 08:30 nvd

Patch available

PoC Detected

Mar 17, 2026 - 15:52 vuln.today

Public exploit code

CVE Published

Aug 07, 2025 - 20:15 nvd

MEDIUM 5.5

DescriptionCVE.org

In GStreamer through 1.26.1, the subparse plugin's subrip_unescape_formatting function may dereference a NULL pointer while parsing a subtitle file, leading to a crash.

Executive ViewAI

Why It Matters

Organizations using GStreamer should be aware of moderate risk from CVE-2025-47807, a null pointer dereference vulnerability rated CVSS 5.5. Exploitation could compromise the security of affected deployments. Proof-of-concept code is publicly available. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low

Compensating Controls

Apply vendor patch. If patching is delayed: enable ASLR/DEP, apply network segmentation.

Threat Intelligence Overview

EPSS Score

0.0%

Top 93% exploitable

Exploit

POC

Public exploit code exists

Data Quality

5 sources

Confidence: Medium

CVE.org

EPSS Vendor

GitHub

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 MEDIUM

CISA KEV No

Public POC Yes

EPSS 0.0%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

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

Defer

Exploitation· derived

Poc

System Exposure· derived

Small

Automatable· derived

No

Human Impact

Low

Priority Score

48

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +28

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)CVE.org

cpe:2.3:a:gstreamer:gstreamer:*:*:*:*:*:*:*:*

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Same weakness CWE-476 – NULL Pointer Dereference

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CVE-2015-5119 CRITICAL POC

CVE-2011-2462 CRITICAL POC

CVE-2011-0611 HIGH POC

CVE-2012-1889 HIGH POC

CVE-2012-0507 CRITICAL POC

CVE-2014-1761 HIGH POC

CVE-2015-5122 CRITICAL POC

CVE-2011-0609 HIGH POC

Vendor StatusVendor

SUSE

Severity: Medium

Product	Status
Container suse/sl-micro/6.0/baremetal-os-container:latest	Affected
SUSE Enterprise Storage 7.1	Fixed
SUSE Linux Enterprise Desktop 15 SP6 SUSE Linux Enterprise High Performance Computing 15 SP6 SUSE Linux Enterprise Module for Basesystem 15 SP6 SUSE Linux Enterprise Server 15 SP6 SUSE Linux Enterprise Server for SAP Applications 15 SP6	Fixed
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS	Fixed

References

Advisories & patches

ADVISORY https://gstreamer.freedesktop.org/security/ ADVISORY https://vuldb.com/?id.319190 ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:02020/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:02302/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:02304/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:02472/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:02796/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:02919/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:20507/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:20751/

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