CVE-2026-49337Public exploitNetwork attack vector

Service interruption via orphaned slice-header retention

Published Jun 19, 2026 · Updated Jun 19, 2026

Resource exhaustion in Struktur AG libde265 before 1.0.20 allows remote attackers to interrupt decoding via crafted H.265 NAL units. In decoder_context::read_slice_NAL, a finished picture remains referenced after its image unit is drained, so later non-first slice headers are appended and retained without an active image unit. Exploitation requires user interaction and sustained delivery of malformed slices; heap usage grows linearly until the decoding process becomes unavailable.

CVSS severity4.3
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Struktur AG libde265 before 1.0.20 allows remote attackers to interrupt decoding via crafted H.265 NAL units. In decoder_context::read_slice_NAL, a finished picture remains referenced after its image unit is drained, so later non-first slice headers are appended and retained without an active image unit. Exploitation requires user interaction and sustained delivery of malformed slices; heap usage grows linearly until the decoding process becomes unavailable.

The record

CVE
CVE-2026-49337
Published
Jun 19, 2026
Updated
Jun 19, 2026
Vendor
Struktur AG
Product
libde265
Classifications
CWE-770, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 19, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.0.20

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Struktur AG · libde265version=< 1.0.20

Published CVSS scores

4.3GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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 exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

Public exploit references

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Technologies

Your stack

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Your stack

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