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gst-plugins-bad EUVDEUVD-2026-36295

| CVE-2026-53702 MEDIUM
Out-of-bounds Write (CWE-787)
2026-06-11 redhat GHSA-gmqw-mqj2-6j9j
6.5
CVSS 3.1 · NVD
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Severity by source

Vendor (redhat) PRIMARY
MEDIUM
qualitative
NVD
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
vuln.today AI
6.5 MEDIUM

Network-delivered crafted H.265 triggers crash without attacker privileges; mandatory user interaction (file open) confirmed; impact is availability-only with no confirmed confidentiality or integrity loss.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
6.5 MEDIUM
qualitative

Primary rating from Vendor (redhat).

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Analysis Generated
Jun 11, 2026 - 19:26 vuln.today
CVE Published
Jun 11, 2026 - 18:15 nvd
MEDIUM 6.5

DescriptionNVD

A stack buffer overflow flaw was found in the GStreamer H.265 codec parser library (gst-plugins-bad). When parsing a buffering period SEI message, the parser uses an incorrect loop bound derived from cpb_cnt_minus1[i] (the loop index) instead of the sub-layer 0 CPB count cpb_cnt_minus1[0] from the referenced Sequence Parameter Set. A crafted H.265 video file or stream can cause the parser to write beyond the bounds of stack-allocated CPB delay arrays, resulting in a crash or potential stack memory corruption.

AnalysisAI

Stack buffer overflow in GStreamer's H.265/HEVC codec parser (gst-plugins-bad) allows remote unauthenticated attackers to crash GStreamer-based applications by delivering a crafted H.265 video file or stream that a user opens. The root cause is an incorrect loop bound in the buffering period SEI message parser: the parser mistakenly uses cpb_cnt_minus1[i] (the current loop index variable) rather than cpb_cnt_minus1[0] from the referenced Sequence Parameter Set, causing the loop to iterate beyond the bounds of stack-allocated CPB delay arrays and corrupt stack memory. No public exploit has been identified at time of analysis and the vulnerability is not listed in CISA KEV, though the deterministic parser logic makes crash reproduction straightforward.

Technical ContextAI

GStreamer is a widely deployed open-source multimedia pipeline framework; gst-plugins-bad is its collection of lower-maturity plugins, including the H.265/HEVC video codec parser. H.265 uses Supplemental Enhancement Information (SEI) messages to carry metadata alongside encoded video; the 'buffering period' SEI type conveys CPB (Coded Picture Buffer) parameters used for HRD (Hypothetical Reference Decoder) conformance. For each sub-layer, an SPS defines cpb_cnt_minus1[layer], controlling how many CPB parameter sets are present. The CWE-787 (Out-of-Bounds Write) root cause is a loop-bound substitution error: when iterating to read CPB initial removal delay values into a fixed-size stack array, the parser uses the incrementing loop variable index cpb_cnt_minus1[i] as the bound rather than the correct fixed count cpb_cnt_minus1[0] from the SPS. This causes the loop to run an unintended number of iterations, writing CPB delay values past the end of the stack-allocated array and corrupting adjacent stack memory. Affected deployments are confirmed via CPE for Red Hat Enterprise Linux 7, 8, 9, and 10.

RemediationAI

Monitor the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-53702 and the associated Bugzilla ticket at https://bugzilla.redhat.com/show_bug.cgi?id=2487612 for a patched gst-plugins-bad package release and apply it to all affected RHEL 7, 8, 9, and 10 systems when available. No exact fixed version number is present in the provided data - patch availability per vendor advisory has not yet been independently confirmed. As a compensating control prior to patching, restrict GStreamer-based applications from processing H.265/HEVC video from untrusted or external sources: configure media players to whitelist trusted content origins, enforce content-type filtering at perimeter proxies to block H.265 streams, or disable HEVC decoding capabilities where operationally feasible - note that disabling HEVC will break H.265 playback for legitimate use cases. Systems that do not use GStreamer-based multimedia applications (headless servers, non-desktop RHEL deployments) are not exposed and require no action.

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Basesystem 15 SP7 Affected
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Affected
SUSE Linux Enterprise Module for Package Hub 15 SP7 Affected

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EUVD-2026-36295 vulnerability details – vuln.today

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