CVE-2025-9165Public exploit

Local memory leak via unclosed first TIFF handle

Published Aug 19, 2025 · Updated Oct 1, 2025

Memory leak in LibTIFF tiffcmp 4.7.0 allows local users to leave allocations unreleased by supplying an unreadable second TIFF file. When TIFFOpen fails for the second input, main returns without calling TIFFClose on the already opened first handle, leaving its parsing allocations for process exit. The condition requires local execution, and the upstream maintainer disputes any security impact because the command-line tool is already exiting.

CVSS severity2.5
Low
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in LibTIFF tiffcmp 4.7.0 allows local users to leave allocations unreleased by supplying an unreadable second TIFF file. When TIFFOpen fails for the second input, main returns without calling TIFFClose on the already opened first handle, leaving its parsing allocations for process exit. The condition requires local execution, and the upstream maintainer disputes any security impact because the command-line tool is already exiting.

The record

CVE
CVE-2025-9165
Published
Aug 19, 2025
Updated
Oct 1, 2025
Vendor
LibTIFF
Product
LibTIFF
Classifications
CWE-401
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 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=4.7.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

LibTIFF · LibTIFFversion=4.7.0

Published CVSS scores

1.1UbuntuCVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
2.5UbuntuCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime

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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