CVE-2023-24756Public exploit

Decoder crash via null SSE destination write

Published Mar 1, 2023 · Updated Mar 7, 2025

NULL pointer dereference in libde265 1.0.10 allows context-dependent attackers to crash decoding software via a crafted HEVC file. In ff_hevc_put_unweighted_pred_8_sse at sse-motion.cc:116, an SSE store writes prediction data through a null destination pointer while decoding malformed stream structures. A user or consuming application must open the file on an x86 build using the SSE path, after which the affected decoding process aborts without disclosed confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in libde265 1.0.10 allows context-dependent attackers to crash decoding software via a crafted HEVC file. In ff_hevc_put_unweighted_pred_8_sse at sse-motion.cc:116, an SSE store writes prediction data through a null destination pointer while decoding malformed stream structures. A user or consuming application must open the file on an x86 build using the SSE path, after which the affected decoding process aborts without disclosed confidentiality or integrity impact.

The record

CVE
CVE-2023-24756
Published
Mar 1, 2023
Updated
Mar 7, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 7, 2025Record 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 vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS:3.1/AV:L/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1204.002Malicious File

Public exploit references

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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