LiveActive security incident?Get immediate response
CVE Record

CVE-2026-2922: GStreamer RealMedia Demuxer Out-Of-Bounds Write Remote Code Execution Vulnerability

GStreamer RealMedia Demuxer Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the processing of video packets. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28845.

HighCVSS 7.8Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A flaw in GStreamer's RealMedia demuxer can let a crafted media file corrupt memory and run code inside the app that processes it. It requires a user or service to process attacker-controlled media. Treat as high for systems that ingest media from untrusted sources; no provided source confirms active exploitation.

Executive priority

Prioritize patching on systems that process files from users, partners, email, web uploads, or shared storage. Business urgency is high for media ingestion and desktop fleets; lower where GStreamer is absent or cannot process untrusted media.

Technical view

CVE-2026-2922 is a CWE-787 out-of-bounds write in GStreamer RealMedia video packet processing. The issue comes from missing validation of user-supplied data and may write past an allocated buffer, enabling code execution in the current process. CVSS is 7.8, with user interaction required.

Likely exposure

Exposure is most likely where GStreamer processes RealMedia or attacker-supplied media files, including desktop media players, transcoding services, thumbnailers, or backend ingestion workflows. The provided affected-version data is incomplete and lists a commit-like identifier with unknown default status.

Exploitation context

The source bundle says interaction with the library is required and attack vectors vary by implementation. Exploitation requires processing crafted media through the vulnerable demuxer. CISA KEV is false in the bundle, and no cited source states active exploitation.

Researcher notes

Key uncertainty is exact affected version range. The bundle identifies the vulnerable area and a vendor commit, but does not provide full package mapping across ecosystems. Avoid claiming internet-remote exploitation unless a specific application exposes automated GStreamer processing to untrusted input.

Mitigation direction

  • Apply GStreamer or distribution updates that include the vendor fix commit.
  • Review applicable Red Hat RHSA advisories for package-specific fixes.
  • Reduce or sandbox processing of untrusted RealMedia files until patched.
  • Disable unnecessary media ingestion paths where operationally feasible.
  • Monitor vendor guidance for clarified affected versions and backports.

Validation and detection

  • Inventory systems and applications that include or bundle GStreamer.
  • Confirm whether RealMedia demuxing is installed, enabled, or reachable.
  • Compare installed package versions against GStreamer and Red Hat advisories.
  • Verify updates include the referenced GStreamer fix commit or vendor backport.
  • Check media ingestion services for sandboxing and least-privilege execution.
Prepared
Confidence
medium
Sources
12

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-787: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-2922 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
High
CVSS
7.8 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
5Timeline events
2ADP providers
12Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: total

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.8CVSS 3.0HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9zdi
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2026-2922Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. ADP timelineredhat-SADP

    Made public.

  3. CVE publishedCVE Program

    The CVE record was published.

  4. ADP timelineredhat-SADP

    Reported to Red Hat.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
redhat-SADPgstreamer-plugins-ugly: GStreamer: Remote Code Execution via out-of-bounds write in RealMedia Demuxer
other:Red Hat severity ratingcvssV3_1
  • 2026-03-13T21:02:17.101Z: Reported to Red Hat.
  • 2026-03-13T20:38:49.124Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
GStreamerGStreamer1c6e163aa33962f5ee4a87d29319ccdd5cb67612unknown
Weakness

CWE details

CWE-787

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-787 · source CWE mapping

Out-of-bounds Write

Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs