LiveActive security incident?Get immediate response
CVE Record

CVE-2026-2921: GStreamer RIFF Palette Integer Overflow Remote Code Execution Vulnerability

GStreamer RIFF Palette Integer Overflow 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 handling of palette data in AVI files. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28854.

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

Security readout for executives and security teams

Plain-English summary

CVE-2026-2921 is a high-severity GStreamer flaw in AVI palette handling. A malicious media file could cause memory corruption and let attacker-controlled code run in the process that opens or processes it. The main business concern is systems or applications that ingest untrusted media through GStreamer.

Executive priority

Prioritize remediation for internet-facing or automated media-processing workflows. Desktop-only exposure is still meaningful because user-opened media can trigger the issue, but urgency is highest where untrusted files are processed at scale.

Technical view

The flaw is an integer overflow in RIFF palette parsing for AVI files, caused by insufficient validation before memory writes. ZDI reports potential arbitrary code execution in the current process. The source bundle identifies GStreamer as affected and links a vendor commit, plus Debian and Red Hat advisories.

Likely exposure

Exposure is most likely where servers, desktops, or applications use GStreamer to parse AVI files or user-supplied media. Exact vulnerable release mapping is incomplete in the provided bundle, so package-level assessment should follow vendor and distribution advisories.

Exploitation context

The CVSS vector requires local interaction and user interaction, but ZDI describes remote attackers depending on the application path. The bundle does not show CISA KEV listing or confirmed active exploitation. Treat untrusted media parsing as the practical attack surface.

Researcher notes

The provided evidence supports a memory-safety issue in AVI palette handling, categorized as CWE-190. Public sources in the bundle do not provide exploit details, broad product impact mapping, or confirmed exploitation. Avoid assuming all GStreamer consumers are exploitable without validating parser reachability.

Mitigation direction

  • Apply GStreamer updates from the upstream vendor or Linux distribution advisories.
  • Prioritize Red Hat and Debian systems referenced by the published advisories.
  • Restrict processing of untrusted AVI files until affected systems are patched.
  • Reduce exposure in services that automatically ingest user-uploaded media.
  • Check vendor guidance for exact fixed package versions before declaring remediation complete.

Validation and detection

  • Inventory systems and applications that include or link against GStreamer.
  • Identify workflows that parse AVI or other RIFF media from untrusted sources.
  • Compare installed packages against Debian, Red Hat, or upstream advisory status.
  • Verify scanners or SBOM tooling flag CVE-2026-2921 where GStreamer is present.
  • Confirm patched builds include the referenced upstream fix or distribution backport.
Prepared
Confidence
medium
Sources
8

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-190: 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-2026-2921 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
3ADP providers
23Source 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-2026-2921Attack 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
CVECVE Program Container
redhat-SADPgstreamer-plugins-base: GStreamer: Arbitrary code execution via RIFF palette integer overflow in AVI file handling
other:Red Hat severity ratingcvssV3_1
  • 2026-03-13T21:02:05.060Z: Reported to Red Hat.
  • 2026-03-13T20:41:50.780Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
GStreamerGStreamer1c6e163aa33962f5ee4a87d29319ccdd5cb67612unknown
Weakness

CWE details

CWE-190

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

CWE-190 · source CWE mapping

Integer Overflow or Wraparound

Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs