CVE-2026-2920VulnerabilityPublished 20 Apr 2026Updated 5 Nov 2026

Red Hat Security Advisory: gstreamer1-plugins-bad-free, gstreamer1-plugins-base, gstreamer1-plugins-good, and

Affects Red Hat gstreamer1-plugins-bad-freeSource GCVE Database

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Mentioned vulnerabilities

Not known to be exploited.

Data as of 9 Nov 2026, 23:24 UTC

Severity

High

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.9% chance of exploitation in 30 days – higher than 60% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

Disclosed: evidence found.
CVE published 20 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Red Hatredhat/gstreamer1-plugins-bad-free`pkg:rpm/redhat/gstreamer1-plugins-bad-free`Other threats	Affected =1.24.11-3.el10_0 =1.24.11-1.el10_0.1 =1.24.11-1.el10_0.2	Fixed in–
Red Hatredhat/gstreamer1-plugins-base`pkg:rpm/redhat/gstreamer1-plugins-base`Other threats	Affected =1.24.11-3.el10_0 =1.24.11-1.el10_0.1 =1.24.11-1.el10_0.2	Fixed in–
Red Hatredhat/gstreamer1-plugins-good`pkg:rpm/redhat/gstreamer1-plugins-good`Other threats	Affected =1.24.11-3.el10_0 =1.24.11-1.el10_0.1 =1.24.11-1.el10_0.2	Fixed in–
Red Hatredhat/gstreamer1-plugins-ugly-free`pkg:rpm/redhat/gstreamer1-plugins-ugly-free`Other threats	Affected =1.24.11-3.el10_0 =1.24.11-1.el10_0.1 =1.24.11-1.el10_0.2	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released updated packages for gstreamer1-plugins-bad-free, gstreamer1-plugins-base, gstreamer1-plugins-good, and gstreamer1-plugins-ugly-free as part of Red Hat Enterprise Linux 10.0 Extended Update Support. Users should apply these official patches promptly following the instructions in the Red Hat advisory RHSA-2026:8854 (https://access.redhat.com/errata/RHSA-2026:8854). No alternative mitigations or workarounds are specified. Patch status is confirmed; applying the vendor-provided updates is the recommended remediation.

Description

Multiple security vulnerabilities have been identified in GStreamer plugins included in Red Hat Enterprise Linux 10.0 Extended Update Support. These vulnerabilities include arbitrary code execution and remote code execution via heap-based buffer overflows, integer overflows, and out-of-bounds writes in various media file parsers and demuxers such as ASF, JPEG, AVI, RealMedia, RTP, and DVB subtitles. Red Hat has issued an important security advisory (RHSA-2026:8854) addressing these issues with updated packages. The vulnerabilities affect several GStreamer plugin packages: bad-free, base, good, and ugly-free. The advisory provides updated packages for multiple architectures and product variants. The severity is rated as high by the source. Patch availability is confirmed through the advisory with instructions for applying updates.

Reports on CVE-2026-2920

ZDI-26-164: GStreamer ASF Demuxer Heap-based Buffer Overflow Remote Code Execution VulnerabilityZero Day Initiative2026-03-06

Impact

Successful exploitation of these vulnerabilities could allow an attacker to execute arbitrary code remotely on affected systems by processing specially crafted media files. This could lead to full compromise of the affected system. The vulnerabilities affect multiple GStreamer plugins responsible for handling various media formats, increasing the attack surface. The severity is rated high by Red Hat Product Security. No known exploits in the wild have been reported yet.

CWE-120Buffer Copy without Checking Size of Input (Classic Buffer Overflow) (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #11
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
Requirements · Language Selection
Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Operation · Build and Compilation · Environment Hardening
Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index…
OWASP Cheat Sheets
Docker Security (opens in a new tab)
XML Security (opens in a new tab)
OWASP ASVS 4.0.3
V5.4.1 (opens in a new tab)
V14.1.2 (opens in a new tab)
V13.3.1 (opens in a new tab)
Attack patterns
Buffer Overflow via Environment Variables (opens in a new tab)
Overflow Buffers (opens in a new tab)
Client-side Injection-induced Buffer Overflow (opens in a new tab)
Filter Failure through Buffer Overflow (opens in a new tab)
MIME Conversion (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-190Integer Overflow or Wraparound (opens in a new tab)
Base weaknessLikelihood of exploit: Medium
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
Requirements
Ensure that all protocols are strictly defined, such that all out-of-bounds behavior can be identified simply, and require strict conformance to the protocol.
Requirements · Language Selection
Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V5.4.3 (opens in a new tab)
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
Attack patterns
Forced Integer Overflow (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-787Out-of-bounds Write (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #5
The product writes data past the end, or before the beginning, of the intended buffer.
Requirements · Language Selection
Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Operation · Build and Compilation · Environment Hardening
Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index…
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-1284Improper Validation of Specified Quantity in Input (opens in a new tab)
Base weakness
The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.
Implementation · Input Validation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

What to do

Affected software

Description

Reports on CVE-2026-2920

AI analysisMachine-generated, updated 20 Jul 2026, 21:01 UTC

WeaknessesCWE-120, CWE-190, CWE-787 +1

Technical details

References

Community reviews

Related threats