CVE-2026-53702Network attack vector

Application crash via incorrect H.265 loop bound

Published Jun 11, 2026 · Updated Jun 11, 2026

Out-of-bounds write in GStreamer gst-plugins-bad before 1.28.3 allows remote attackers to crash applications via crafted H.265 media. The buffering period SEI loop indexes cpb_cnt_minus1 with its counter instead of sub-layer 0, overrunning stack-allocated CPB delay arrays. Processing a malicious file or stream requires user interaction; confirmed impact is an application crash, and Red Hat reports code execution as unlikely under its hardening.

CVSS severity6.5
Medium
EPSS probability0.23%
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 before 1.28.3 allows remote attackers to crash applications via crafted H.265 media. The buffering period SEI loop indexes cpb_cnt_minus1 with its counter instead of sub-layer 0, overrunning stack-allocated CPB delay arrays. Processing a malicious file or stream requires user interaction; confirmed impact is an application crash, and Red Hat reports code execution as unlikely under its hardening.

The record

CVE
CVE-2026-53702
Published
Jun 11, 2026
Updated
Jun 11, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002
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 HatCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
T1204.002User Execution: Malicious File

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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