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CVE Record

CVE-2026-4887: Gimp: gimp:memory disclosure and denial of service via specially crafted pcx image

A flaw was found in GIMP. This issue is a heap buffer over-read in GIMP PCX file loader due to an off-by-one error. A remote attacker could exploit this by convincing a user to open a specially crafted PCX image. Successful exploitation could lead to out-of-bounds memory disclosure and a possible application crash, resulting in a Denial of Service (DoS).

MediumCVSS 6.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2026-4887 is a GIMP image-parsing flaw. If a user opens a malicious PCX image, GIMP may read past allocated memory, potentially exposing limited memory contents or crashing. Business impact is mainly workstation disruption and limited information exposure, not remote system takeover based on the provided sources.

Executive priority

Prioritize normal security patching for user workstations and image-handling systems. Escalate only where GIMP processes untrusted images routinely, because the issue needs user interaction and sources do not show active exploitation.

Technical view

The flaw is a heap buffer over-read in the GIMP PCX file loader caused by an off-by-one error, classified as CWE-193. CVSS 3.1 is 6.1, with no privileges required but user interaction required. Reported impacts are low confidentiality loss and high availability impact.

Likely exposure

Exposure is most likely on RHEL systems with the affected GIMP packages installed, especially workstations or image-processing environments where users open PCX files. The bundle lists RHEL 7 ELS, RHEL 8 AppStream and lifecycle variants, RHEL 9 variants, and unknown status for RHEL 6.

Exploitation context

The source bundle does not show CISA KEV listing or active exploitation. Exploitation requires a crafted PCX file and user action to open it in GIMP. No source in the bundle supports claims of remote code execution or exploitation in the wild.

Researcher notes

Focus validation on the PCX loader path and affected Red Hat package streams. The provided evidence supports heap over-read, limited memory disclosure, and crash/DoS. It does not support exploit-in-the-wild, code execution, or non-Red Hat affected product conclusions.

Mitigation direction

  • Review the applicable Red Hat RHSA advisory for your RHEL channel.
  • Apply vendor-supplied GIMP package updates where Red Hat provides them.
  • Avoid opening PCX files from untrusted or unsolicited sources.
  • Remove GIMP from systems where it has no business need.
  • Treat RHEL 6 exposure as uncertain until vendor guidance confirms status.

Validation and detection

  • Inventory systems for installed GIMP or gimp:2.8 packages.
  • Map each host to its RHEL version and lifecycle channel.
  • Compare installed package state against the relevant Red Hat advisory.
  • Confirm users handling external images have received PCX file-risk guidance.
  • Track RHEL 6 separately because the provided status is unknown.
Prepared
Confidence
high
Sources
12

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-193: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2026-4887 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.1 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
5Timeline events
1ADP providers
15Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6.1CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H1.84.2redhat

Vulnerability scoring details

Base CVSS 3.1 score

6.1Medium
CVSS 3.1 vector shape for CVE-2026-4887Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. Source timelineredhat

    Reported to Red Hat.

  3. Source timelineredhat

    Made public.

  4. CVE publishedCVE Program

    The CVE record was published.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Supportgimp, 2:2.8.22-1.el7_9.6affected
Red HatRed Hat Enterprise Linux 8gimp:2.8, 8100020260512115927.4c9c024faffected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportgimp:2.8, 8040020260520140422.70584597affected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Ongimp:2.8, 8040020260520140422.70584597affected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportgimp:2.8, 8060020260520140100.6af1eaf0affected
Red HatRed Hat Enterprise Linux 8.6 Telecommunications Update Servicegimp:2.8, 8060020260520140100.6af1eaf0affected
Red HatRed Hat Enterprise Linux 8.6 Update Services for SAP Solutionsgimp:2.8, 8060020260520140100.6af1eaf0affected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Servicegimp:2.8, 8080020260520102644.0621e4eeaffected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutionsgimp:2.8, 8080020260520102644.0621e4eeaffected
Red HatRed Hat Enterprise Linux 9gimp, 2:3.0.4-1.el9_7.5affected
Red HatRed Hat Enterprise Linux 9gimp, 2:3.0.4-4.el9_8.4affected
Red HatRed Hat Enterprise Linux 9.0 Update Services for SAP Solutionsgimp, 2:2.99.8-3.el9_0.6affected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutionsgimp, 2:2.99.8-4.el9_2.6affected
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutionsgimp, 2:2.99.8-4.el9_4.6affected
Red HatRed Hat Enterprise Linux 9.6 Extended Update Supportgimp, 2:2.99.8-4.el9_6.7affected
Red HatRed Hat Enterprise Linux 6gimpunknown
Weakness

CWE details

CWE-193

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-193 · source CWE mapping

Off-by-one Error

Off-by-one Error represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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