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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-listed Updated
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Glexia's Take moderate

Analyst readout for executives and security teams

Plain-English summary

CVE-2026-4887 affects GIMP when a user opens a malicious PCX image. The likely impact is application crash and limited memory disclosure, not system takeover. Business urgency is moderate: prioritize endpoints or servers where GIMP is installed and users handle untrusted image files.

Executive priority

Treat as a routine but timely desktop/application patching issue. Prioritize creative, support, and engineering teams that receive external image files. This is not currently supported as an actively exploited or remote unauthenticated server compromise issue by the provided sources.

Technical view

GIMP’s PCX file loader has a heap buffer over-read caused by an off-by-one error, mapped to CWE-193. CVSS 3.1 is 6.1 with user interaction required, low confidentiality impact, no integrity impact, and high availability impact. Red Hat lists multiple RHEL 8 and 9 GIMP packages affected; RHEL 7 affected; RHEL 6 status unknown.

Likely exposure

Exposure is most relevant on Red Hat systems with GIMP installed, especially RHEL 7, RHEL 8 AppStream, and RHEL 9 AppStream or SAP/EUS/TUS variants listed by Red Hat. Exploitation requires a user to open a crafted PCX file.

Exploitation context

The source bundle does not indicate active exploitation, and KEV is false. Abuse depends on social engineering or file-handling workflows that deliver PCX images to GIMP users. The described outcomes are out-of-bounds memory disclosure and possible crash.

Researcher notes

Key uncertainty is fix detail per stream; the bundle references multiple RHSAs but does not provide full remediation metadata. Avoid assuming impact beyond the stated PCX loader over-read. RHEL 6 is listed with unknown status, so confirm directly with Red Hat if still in scope.

Mitigation direction

  • Apply the relevant Red Hat security advisory updates for affected RHEL channels.
  • Check Red Hat CVE guidance for your exact product stream and package version.
  • Limit opening PCX files from untrusted sources until patched.
  • Remove GIMP where it is not business-required.
  • Educate users handling images about malicious file risk.

Validation and detection

  • Inventory systems with GIMP installed across RHEL 7, 8, and 9.
  • Map installed packages to Red Hat’s affected product list.
  • Confirm applicable RHSA advisories are installed for each RHEL stream.
  • Review image-processing workflows that accept PCX files from external parties.
  • Track Red Hat Bugzilla and GNOME issue updates for status changes.
Prepared
Confidence
high
Sources
12

Public sources used

Based on public source material and reviewed before publication.

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 profile CVE 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.

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

SSVC decision data

CISA-ADP CISA 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.

Score Version Severity Vector Exploit Impact Source
6.1 CVSS 3.1 Medium CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H 1.8 4.2 redhat

Vulnerability scoring details

Base CVSS 3.1 score

6.1 Medium
CVSS 3.1 vector shape for CVE-2026-4887 Attack 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 reserved CVE Program

    The CVE ID was reserved by the assigning CNA.

  2. Source timeline redhat

    Reported to Red Hat.

  3. Source timeline redhat

    Made public.

  4. CVE published CVE Program

    The CVE record was published.

  5. CVE updated CVE Program

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

ADP provider summaries

CISA-ADP CISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

Vendor Product Version / package Status
Red Hat Red Hat Enterprise Linux 8 gimp:2.8, 8100020260512115927.4c9c024f affected
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support gimp:2.8, 8040020260520140422.70584597 affected
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On gimp:2.8, 8040020260520140422.70584597 affected
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support gimp:2.8, 8060020260520140100.6af1eaf0 affected
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service gimp:2.8, 8060020260520140100.6af1eaf0 affected
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions gimp:2.8, 8060020260520140100.6af1eaf0 affected
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service gimp:2.8, 8080020260520102644.0621e4ee affected
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions gimp:2.8, 8080020260520102644.0621e4ee affected
Red Hat Red Hat Enterprise Linux 9 gimp, 2:3.0.4-1.el9_7.5 affected
Red Hat Red Hat Enterprise Linux 9 gimp, 2:3.0.4-4.el9_8.4 affected
Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions gimp, 2:2.99.8-3.el9_0.6 affected
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions gimp, 2:2.99.8-4.el9_2.6 affected
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions gimp, 2:2.99.8-4.el9_4.6 affected
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support gimp, 2:2.99.8-4.el9_6.7 affected
Red Hat Red Hat Enterprise Linux 6 gimp unknown
Red Hat Red Hat Enterprise Linux 7 gimp affected
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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