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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Craft malicious TIM file
  2. Delivery
    Deliver file to victim system
  3. Exploit
    Victim opens file with GIMP
  4. Execution
    TIM loader’s 4BPP decoder overflows stack buffer
  5. Impact
    Application crashes

Vulnerability Assessment

Weakness
CWE
CWE-787
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, write limits
MITRE ATT&CK

2 techniques across 2 tactics: Execution, Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Exploitation Conditions

The only prerequisite is that a user opens a specially crafted TIM image file with a vulnerable version of GIMP. The overflow occurs unconditionally in the 4BPP decoding path, requiring no special configuration, authentication beyond local system access, or network exposure.
Impact

The CVSS v3.1 score is 5.0 (Medium) with vector AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H, reflecting a locally exploitable DoS that requires user interaction and low privileges. EPSS gives a 0.01% probability of exploitation (0th percentile), indicating negligible real‑world exploit likelihood. SSVC analysis rates exploitation as ‘none’, automatable as ‘no’, and technical impact ‘partial’ - entirely consistent with a low‑risk, non‑escalatable crash. No KEV listing exists, and no public exploit code has been identified. The vulnerability is a genuine DoS with no data exposure or privilege escalation, so it is a low priority for most environments.
Exploit ScenarioDerived

An attacker creates a weaponized .tim file and delivers it via email or a malicious website. A local user downloads and opens the file in GIMP. The TIM loader's 4BPP decoder processes the malformed content, causing a stack buffer overflow that immediately crashes the application.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 26, 2026

Denial of service in GIMP allows local attackers to crash the application by tricking a user into opening a malicious TIM image file. The vulnerability resides in the TIM image loader's 4BPP decoding path, where an unconditional stack buffer overflow occurs when processing a specially crafted file, with no impact on confidentiality or integrity. No active exploitation or public exploit is known, and a vendor patch is available.

RemediationAI

Apply the vendor‑released patch through Red Hat's standard update channels. Exact fix versions are not stated in the advisory, but upgrading to the latest GIMP packages for your RHEL release will resolve the issue. As a temporary workaround, avoid opening untrusted TIM image files in GIMP, though this only reduces exposure and does not eliminate the underlying bug.

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Technical ContextAI · show details

The flaw is in GIMP's built-in handling of the TIM (Timber) image format, specifically in the routine that decodes 4‑bits‑per‑pixel (4BPP) data. During decoding, a fixed‑size stack buffer is written to without proper bounds checking, leading to a classic CWE-787 Out-of-bounds Write. The affected component is GIMP as shipped with Red Hat Enterprise Linux 6, 7, 8, and 9 (CPE strings confirm the distribution channels, though the code is part of the GIMP application itself).

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 5.5 MEDIUM
AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
vuln.today AI 5.0 MEDIUM

Local attack, low privileges, user must open the file, only availability impact from the crash

3.1 AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
4.0 AV:L/AC:L/AT:N/PR:L/UI:R/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE 3.1 LOW
AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Red Hat 5.0 MEDIUM

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

3
CVSS changed
Oct 26, 2026 - 21:23 NVD
5.0 (MEDIUM) 5.5 (MEDIUM)
Patch released
Apr 19, 2026 - 08:30 nvd
Patch available
CVE Published
Apr 15, 2026 - 18:58 nvd
MEDIUM 5.0

DescriptionNVD

A flaw was found in GIMP. A stack buffer overflow vulnerability in the TIM image loader's 4BPP decoding path allows a local user to cause a Denial of Service (DoS). By opening a specially crafted TIM image file, the application crashes due to an unconditional overflow when writing to a variable-length array.

Threat Intelligence Overview

EPSS Score
0.0%
Top 100% exploitable
Prevalence
Medium
GIMP is a widely used image editor on Linux, particularly in RHEL environments
Data Quality
7 sources
Confidence: High
EUVD NVD CVE.org EPSS Vulnrichment Vendor VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation
None
System Exposure· derived
Small
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

28
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +28
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Memory Corruption HIGH

Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)NVD

cpe:2.3:a:red_hat:red_hat_enterprise_linux_6:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_7:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_8:*:*:*:*:*:*:*:*
cpe:2.3:a:red_hat:red_hat_enterprise_linux_9:*:*:*:*:*:*:*:*

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Same weakness CWE-787 – Out-of-bounds Write

View all
CVE-2015-3113 CRITICAL POC
9.8
CVE-2011-2462 CRITICAL POC
9.8
CVE-2012-1889 HIGH POC
8.8
CVE-2010-3333 HIGH POC
7.8
CVE-2014-1761 HIGH POC
7.8
CVE-2009-3129 HIGH POC
7.8
CVE-2021-1732 HIGH POC
7.8
CVE-2013-3346 CRITICAL POC
9.8

Same technique Buffer Overflow

View all
CVE-2017-7269 CRITICAL POC
9.8
CVE-2015-5119 CRITICAL POC
9.8
CVE-2020-0796 CRITICAL POC
10.0
CVE-2019-11043 CRITICAL POC
9.8
CVE-2009-0927 HIGH POC
8.8

Vendor StatusVendor

SUSE

Severity: Low
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP7 Fixed
SUSE Linux Enterprise Server 15 SP7 Fixed
SUSE Linux Enterprise Server for SAP Applications 15 SP7 Fixed
SUSE Linux Enterprise Workstation Extension 15 SP7 Fixed

References

Advisories & patches
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-40916 ADVISORY https://vuldb.com/vuln/357837 REF https://access.redhat.com/security/cve/CVE-2026-40916 REF https://bugzilla.redhat.com/show_bug.cgi?id=2458745

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