CVE-2026-53701Network attack vector

Application crash via unchecked tile-slice count

Published Jun 11, 2026 · Updated Jun 11, 2026

Out-of-bounds write in GStreamer gst-plugins-bad 1.25.1 through 1.28.2 allows remote attackers to crash applications via crafted H.266/VVC streams. The multi-slice-in-tile loop in gst_h266_parser_parse_picture_partition() fails to keep the slice index below the picture slice count and writes beyond three fixed-size GstH266PPS arrays. Processing a malicious stream is required; the published CVSS assessment limits the security impact to an application crash.

CVSS severity6.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in GStreamer gst-plugins-bad 1.25.1 through 1.28.2 allows remote attackers to crash applications via crafted H.266/VVC streams. The multi-slice-in-tile loop in gst_h266_parser_parse_picture_partition() fails to keep the slice index below the picture slice count and writes beyond three fixed-size GstH266PPS arrays. Processing a malicious stream is required; the published CVSS assessment limits the security impact to an application crash.

The record

CVE
CVE-2026-53701
Published
Jun 11, 2026
Updated
Jun 11, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5Red Hat, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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