CVE-2025-8961Public exploit

Local tiffcrop crash via aliased buffer double-free

Published Aug 14, 2025 · Updated Aug 23, 2025

Double-free in the tiffcrop utility in LibTIFF 4.7.0 allows local users to crash the process by supplying a malformed TIFF file. The failure cleanup in main frees read_buff even when it aliases crop_buff, then frees crop_buff again; unsupported tiled-image bit depths reach this path. Exploitation requires local execution of tiffcrop with attacker-controlled input and interrupts only that command-line process.

CVSS severity3.3
Low
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double-free in the tiffcrop utility in LibTIFF 4.7.0 allows local users to crash the process by supplying a malformed TIFF file. The failure cleanup in main frees read_buff even when it aliases crop_buff, then frees crop_buff again; unsupported tiled-image bit depths reach this path. Exploitation requires local execution of tiffcrop with attacker-controlled input and interrupts only that command-line process.

The record

CVE
CVE-2025-8961
Published
Aug 14, 2025
Updated
Aug 23, 2025
Vendor
LibTIFF
Product
LibTIFF
Classifications
CWE-119
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 23, 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

3.3NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
1.9NVDCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
1.7NVDAV:L/AC:L/Au:S/C:N/I:N/A:P

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer

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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