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CVE-2026-53702· NVD / CVE Program· CNA redhat

Gstreamer1-plugins-bad-free: gstreamer: stack buffer overflow in h.265 buffering period sei parser

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.

MediumCVSS 6.5 · v3.1—No exploit Fix available
Published
Jun 11, 2026
Updated
Jun 17, 2026
EPSS
0.4% · 31th percentile
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Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
6.5
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat Enterprise Linux 10

    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 7

    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 8

    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 9

    • all versionsaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12gst-plugins-bad1.0all versions—
Debian:14gst-plugins-bad1.0before 1.28.3-11.28.3-1
openSUSE:Leap 16.0gstreamer-plugins-badbefore 1.26.7-160000.3.11.26.7-160000.3.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSgstreamer-plugins-badbefore 1.20.1-150400.3.29.11.20.1-150400.3.29.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSgstreamer-plugins-badbefore 1.22.0-150500.3.34.11.22.0-150500.3.34.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7gstreamer-plugins-badbefore 1.24.0-150600.4.9.11.24.0-150600.4.9.1
SUSE:Linux Enterprise Server 12 SP5-LTSSgstreamer-plugins-badbefore 1.8.3-18.21.11.8.3-18.21.1
SUSE:Linux Micro 6.2gstreamer-plugins-badbefore 1.26.7-160000.3.11.26.7-160000.3.1

Same product

red hat: all records

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Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:gst-plugins-bad1.01.28.3-1 · Debian:14Package registry (OSV)
opensuse:gstreamer-plugins-bad1.26.7-160000.3.1 · openSUSE:Leap 16.0Package registry (OSV)
suse:gstreamer-plugins-bad1.26.7-160000.3.1 · SUSE:Linux Micro 6.2Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

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  • CVE-2026-384234 days apartQemu-kvm: hyperv/syndbg: missing mapped-length guard after cpu_physical_memory_map causes host oob write
    31Monitor
  • CVE-2026-1822048 days apartBinutils: binutils: out-of-bounds write in bfd dlx elf backend relocation processing
    31Monitor
  • CVE-2026-97185105 days apartGimp: gimp: out-of-bounds write in gimpressionist plugin via crafted preset file
    31Monitor
  • CVE-2026-650755 days apartDnsmasq: dnsmasq: denial of service due to out-of-bounds write in dhcp bootreply processing
    30Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records