CVE-2022-36647Public exploit

Decoder crash via unchecked frame-rate index

Published Sep 2, 2022 · Updated Aug 3, 2024

Global buffer over-read in PKUVCL davs2 1.6.205 allows local users to crash the decoder by processing a crafted AVS2 bitstream. parse_sequence_header subtracts one from an unvalidated frame_rate_id and uses the result to index the eight-entry FRAME_RATE table, reading four bytes beyond it. Exploitation requires the decoder to process attacker-controlled media; the demonstrated consequence is a decoder crash, with no reported data disclosure or modification.

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

Global buffer over-read in PKUVCL davs2 1.6.205 allows local users to crash the decoder by processing a crafted AVS2 bitstream. parse_sequence_header subtracts one from an unvalidated frame_rate_id and uses the result to index the eight-entry FRAME_RATE table, reading four bytes beyond it. Exploitation requires the decoder to process attacker-controlled media; the demonstrated consequence is a decoder crash, with no reported data disclosure or modification.

The record

CVE
CVE-2022-36647
Published
Sep 2, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 2, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 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

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
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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