CVE-2025-31344Public exploit

Utility crash via unchecked color-map index

Published Apr 14, 2025 · Updated Apr 14, 2025

Heap buffer overflow in gif2rgb in GIFLIB project giflib 5.2.2 and earlier allows local users to crash the utility via a crafted GIF. DumpScreen2RGB uses each decoded pixel value as an index into ColorMap->Colors without verifying that it is below the color count, producing an out-of-bounds heap read. The default three-file output mode reaches this path without privileges; public evidence demonstrates a process crash rather than code execution.

CVSS severity7.3
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in gif2rgb in GIFLIB project giflib 5.2.2 and earlier allows local users to crash the utility via a crafted GIF. DumpScreen2RGB uses each decoded pixel value as an index into ColorMap->Colors without verifying that it is below the color count, producing an out-of-bounds heap read. The default three-file output mode reaches this path without privileges; public evidence demonstrates a process crash rather than code execution.

The record

CVE
CVE-2025-31344
Published
Apr 14, 2025
Updated
Apr 14, 2025
Vendor
GIFLIB project
Product
giflib
Classifications
CWE-122, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 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=0 <=5.2.2 changes=[{"at":"2c10c1abf8ff2e88b1da04e050bb721487b73fa3","status":"affected"}]

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

GIFLIB project · giflibversion=0 <=5.2.2 changes=[{"at":"2c10c1abf8ff2e88b1da04e050bb721487b73fa3","status":"affected"}]

Published CVSS scores

7.3openEulerCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1499.004Endpoint Denial of Service: Application 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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