CVE-2024-22956Public exploit

Application crash via freed tag-list pointer

Published Jan 19, 2024 · Updated May 30, 2025

Heap use-after-free in SWFTools 0.9.2 allows context-dependent attackers to crash swfc via a crafted SWFC input file. During end-command processing, removeFromTo reads an eight-byte field through a pointer to a heap allocation already freed by c_end. Exploitation requires a user to run swfc on attacker-supplied input; the public demonstration produces an AddressSanitizer-detected abort, while code execution is not demonstrated.

CVSS severity7.8
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap use-after-free in SWFTools 0.9.2 allows context-dependent attackers to crash swfc via a crafted SWFC input file. During end-command processing, removeFromTo reads an eight-byte field through a pointer to a heap allocation already freed by c_end. Exploitation requires a user to run swfc on attacker-supplied input; the public demonstration produces an AddressSanitizer-detected abort, while code execution is not demonstrated.

The record

CVE
CVE-2024-22956
Published
Jan 19, 2024
Updated
May 30, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1204.002
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 19, 2024CVE publishedPublication date reported by the CVE source.
  2. May 30, 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 privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1204.002User Execution: Malicious 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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