CVE-2024-38949Public exploitNetwork attack vector

Application crash via misplaced SDL chroma plane

Published Jun 26, 2024 · Updated Aug 2, 2024

Heap buffer overflow in libde265 1.0.15 allows context-dependent attackers to crash dec265 by opening a crafted H.265 stream. The display444as420 path places the U-plane pointer after half of the luma allocation instead of one quarter, then writes subsampled chroma bytes beyond the SDL texture buffer. The affected dec265 sample player must use SDL output to open a 4:4:4 stream; integrated library users without that renderer do not reach this crash path.

CVSS severity6.5
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in libde265 1.0.15 allows context-dependent attackers to crash dec265 by opening a crafted H.265 stream. The display444as420 path places the U-plane pointer after half of the luma allocation instead of one quarter, then writes subsampled chroma bytes beyond the SDL texture buffer. The affected dec265 sample player must use SDL output to open a 4:4:4 stream; integrated library users without that renderer do not reach this crash path.

The record

CVE
CVE-2024-38949
Published
Jun 26, 2024
Updated
Aug 2, 2024
Vendor
Struktur AG
Product
libde265
Classifications
CWE-122, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=v1.0.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Struktur AG · libde265version=v1.0.15

Published CVSS scores

6.5CISA-ADPCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1204.002User Execution: Malicious File

Public exploit references

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Technologies

Your stack

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Your stack

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