CVE-2023-43887Public exploitNetwork attack vector

Memory disclosure or crash via unchecked tile counts

Published Nov 22, 2023 · Updated Nov 26, 2024

Out-of-bounds read in libde265 1.0.12 allows context-dependent attackers to disclose process memory or crash a decoder via crafted HEVC data. After PPS parsing rejects an excessive tile count, read_pps_NAL still calls pic_parameter_set::dump, whose loops use the invalid count to read beyond the colBd or rowBd arrays. The path is reached when PPS header dumping is enabled and malformed tile data makes parsing fail.

CVSS severity8.1
High
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in libde265 1.0.12 allows context-dependent attackers to disclose process memory or crash a decoder via crafted HEVC data. After PPS parsing rejects an excessive tile count, read_pps_NAL still calls pic_parameter_set::dump, whose loops use the invalid count to read beyond the colBd or rowBd arrays. The path is reached when PPS header dumping is enabled and malformed tile data makes parsing fail.

The record

CVE
CVE-2023-43887
Published
Nov 22, 2023
Updated
Nov 26, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 26, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Application or System Exploitation

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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