CVE-2023-3316Public exploitNetwork attack vector

Process crash via unchecked failed output handle

Published Jun 19, 2023 · Updated Nov 3, 2025

LibTIFF 3.9.0 through 4.5.0 contains a NULL pointer dereference that allows attackers to crash tiffcrop via failed zone output creation. When TIFFOpen cannot create the requested output, update_output_file leaves the output handle NULL, but tiffcrop passes it to TIFFClose, which reads tif_closeproc through the invalid handle. Reachability requires a user or calling workflow to invoke zone selection with an output path that cannot be opened; the bounded consequence is termination of that tiffcrop process.

CVSS severity6.5
Medium
EPSS probability1.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

LibTIFF 3.9.0 through 4.5.0 contains a NULL pointer dereference that allows attackers to crash tiffcrop via failed zone output creation. When TIFFOpen cannot create the requested output, update_output_file leaves the output handle NULL, but tiffcrop passes it to TIFFClose, which reads tif_closeproc through the invalid handle. Reachability requires a user or calling workflow to invoke zone selection with an output path that cannot be opened; the bounded consequence is termination of that tiffcrop process.

The record

CVE
CVE-2023-3316
Published
Jun 19, 2023
Updated
Nov 3, 2025
Vendor
LibTIFF
Product
LibTIFF
Classifications
CWE-476
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.9.0 <4.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LibTIFF · LibTIFFversion=3.9.0 <4.5.1

Published CVSS scores

6.5NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference

Public exploit references

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Technologies

Your stack

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Your stack

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