Vulnerability-Lookup

CVE-2026-34588 (GCVE-0-2026-34588)

Vulnerability from cvelistv5 – Published: 2026-04-06 15:31 – Updated: 2026-09-09 12:05

Title

OpenEXR has a signed 32-bit Overflow in PIZ Decoder Leads to OOB Read/Write

Summary

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.1.0 to before 3.2.7, 3.3.9, and 3.4.9, internal_exr_undo_piz() advances the working wavelet pointer with signed 32-bit arithmetic. Because nx, ny, and wcount are int, a crafted EXR file can make this product overflow and wrap. The next channel then decodes from an incorrect address. The wavelet decode path operates in place, so this yields both out-of-bounds reads and out-of-bounds writes. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.

Severity

8.6 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

8.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-07 03:56 UTC

CWE

CWE-125 - Out-of-bounds Read
CWE-190 - Integer Overflow or Wraparound
CWE-787 - Out-of-bounds Write

Assigner

GitHub_M mitre root

References

20 references

URL	Tags
https://github.com/AcademySoftwareFoundation/open…	x_refsource_CONFIRM
https://github.com/AcademySoftwareFoundation/open…	x_refsource_MISC
https://github.com/AcademySoftwareFoundation/open…	x_refsource_MISC
https://github.com/AcademySoftwareFoundation/open…	x_refsource_MISC
https://access.redhat.com/security/cve/CVE-2026-34588	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2455408	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:17656	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:15888	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19146	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19587	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:17659	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:17658	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:17660	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:15887	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19359	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30078	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30089	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30088	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:30087	vendor-advisoryx_refsource_REDHAT

Impacted products

15 products

Vendor	Product	Version	CPE status
AcademySoftwareFoundation	openexr	Affected: >= 3.1.0, <= 3.1.13 Affected: >= 3.2.0, < 3.2.7 Affected: >= 3.3.0, < 3.3.9 Affected: >= 3.4.0, < 3.4.9	guessed
Red Hat	Red Hat Enterprise Linux 10	Unaffected: 0:3.1.10-8.el10_1.2 , < * (rpm) Unaffected: 0:3.1.10-8.el10_2.2 , < * (rpm) cpe:/o:redhat:enterprise_linux:10.1 cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support	Unaffected: 0:3.1.10-8.el10_0.2 , < * (rpm) cpe:/o:redhat:enterprise_linux_eus:10.0
Red Hat	Red Hat Enterprise Linux 9	Unaffected: 0:3.1.1-3.el9_7.2 , < * (rpm) Unaffected: 0:3.1.1-3.el9_8.2 , < * (rpm) cpe:/a:redhat:enterprise_linux:9
Red Hat	Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions	Unaffected: 0:3.1.1-2.el9_0.3 , < * (rpm) cpe:/a:redhat:rhel_e4s:9.0
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	Unaffected: 0:3.1.1-2.el9_2.3 , < * (rpm) cpe:/a:redhat:rhel_e4s:9.2
Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support	Unaffected: 0:3.1.1-2.el9_4.3 , < * (rpm) cpe:/a:redhat:rhel_eus:9.4
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support	Unaffected: 0:3.1.1-3.el9_6.2 , < * (rpm) cpe:/a:redhat:rhel_eus:9.6
Red Hat	Red Hat AI Inference Server 3.3	Unaffected: 1782352950 , < * (rpm) cpe:/a:redhat:ai_inference_server:3.3::el9
Red Hat	Red Hat AI Inference Server 3.3	Unaffected: 1782352919 , < * (rpm) cpe:/a:redhat:ai_inference_server:3.3::el9
Red Hat	Red Hat AI Inference Server 3.3	Unaffected: 1782353093 , < * (rpm) cpe:/a:redhat:ai_inference_server:3.3::el9
Red Hat	Red Hat AI Inference Server 3.3	Unaffected: 1782352847 , < * (rpm) cpe:/a:redhat:ai_inference_server:3.3::el9
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8

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\"unaffected\", \"version\": \"1782353093\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"rhaiis/vllm-rocm-rhel9\", \"collectionURL\": \"https://catalog.redhat.com/software/containers/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:ai_inference_server:3.3::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat AI Inference Server 3.3\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"1782352847\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"rhaiis/vllm-cuda-rhel9\", \"collectionURL\": \"https://catalog.redhat.com/software/containers/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:6\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 6\", \"packageName\": \"OpenEXR\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:7\"], \"vendor\": \"Red Hat\", 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}

RHSA-2026:30088

Vulnerability from csaf_redhat - Published: 2026-06-25 19:30 - Updated: 2026-09-16 14:06

Summary

Red Hat Security Advisory: Red Hat AI Inference Server 3.3.5 (ROCm)

Severity

Critical

Scope

23 vulnerabilities in this advisory, including CVE-2026-34588.

CVE-2026-34588

A flaw was found in OpenEXR, an image storage format for the motion picture industry. A remote attacker could exploit an integer overflow vulnerability in the `internal_exr_undo_piz()` function by providing a specially crafted EXR file. This flaw leads to out-of-bounds reads and writes, which may allow for arbitrary code execution or sensitive information disclosure.

8.8 (High)


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

Fixed: 1 product

https://access.redhat.com/errata/RHSA-2026:30088

Open the full advisory

RHSA-2026:30089

Vulnerability from csaf_redhat - Published: 2026-06-25 19:32 - Updated: 2026-09-15 15:52

Summary

Red Hat Security Advisory: Red Hat AI Inference Server 3.3.5 (CUDA)

Severity

Critical

Scope

21 vulnerabilities in this advisory, including CVE-2026-34588.

CVE-2026-34588

8.8 (High)


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

Fixed: 2 products

https://access.redhat.com/errata/RHSA-2026:30089

Open the full advisory

rlsa-2026:19146

Vulnerability from osv_rocky

Published

2026-05-29 16:03

Modified

2026-06-12 12:06

Summary

Important: openexr security update

Details

OpenEXR is an open-source high-dynamic-range floating-point image file format for high-quality image processing and storage. This document presents a brief overview of OpenEXR and explains concepts that are specific to this format. This package containes the binaries for OpenEXR.

Security Fix(es):

OpenEXR: OpenEXR: Arbitrary code execution and information disclosure via crafted EXR file (CVE-2026-34588)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Severity

8.8 (High)


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

Credits

Rocky Enterprise Software Foundation

Red Hat

References

URL

Type

	https://errata.rockylinux.org/RLSA-2026:19146	ADVISORY
	https://bugzilla.redhat.com/show_bug.cgi?id=2455408	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:10",
        "name": "openexr",
        "purl": "pkg:rpm/rocky-linux/openexr?distro=rocky-linux-10\u0026epoch=0"
      },
      "ranges": [
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            "yum_repository": "AppStream"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0:3.1.10-8.el10_2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "details": "OpenEXR is an open-source high-dynamic-range floating-point image file format for high-quality image processing and storage. This document presents a brief overview of OpenEXR and explains concepts that are specific to this format.  This package containes the binaries for OpenEXR.\n\nSecurity Fix(es):\n\n* OpenEXR: OpenEXR: Arbitrary code execution and information disclosure via crafted EXR file (CVE-2026-34588)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "id": "RLSA-2026:19146",
  "modified": "2026-06-12T12:06:13.298348Z",
  "published": "2026-05-29T16:03:24.060458Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:19146"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2455408"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Important: openexr security update",
  "upstream": [
    "CVE-2026-34588"
  ]
}

SUSE-SU-2026:21372-1

Vulnerability from csaf_suse - Published: 2026-04-22 10:07 - Updated: 2026-09-16 19:44

Summary

Security update for openexr

Severity

Important

Scope

4 vulnerabilities in this advisory, including CVE-2026-34588.

CVE-2026-34588

7 (High)


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

Recommended: 60 products

Open the full advisory

ubuntu-cve-2026-34588

Vulnerability from osv_ubuntu

Published

2026-04-06 16:16

Modified

2026-06-30 16:20

Summary

Details

Severity

8.6 (High)


                    
                      CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

8.8 (High)


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

7.8 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-34588	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-34588	REPORT
	https://github.com/AcademySoftwareFoundation/open…	REPORT
	https://github.com/AcademySoftwareFoundation/open…	REPORT
	https://github.com/AcademySoftwareFoundation/open…	REPORT
	https://github.com/AcademySoftwareFoundation/open…	REPORT
	https://github.com/AcademySoftwareFoundation/open…	REPORT
	https://github.com/AcademySoftwareFoundation/open…	REPORT
	https://github.com/AcademySoftwareFoundation/open…	REPORT
	https://github.com/AcademySoftwareFoundation/open…	REPORT
	https://ubuntu.com/security/notices/USN-8259-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libopenexr-3-1-30",
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        ]
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      "package": {
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        "name": "openexr",
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      "versions": [
        "3.1.5-5.1",
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        "3.1.5-5.1build2",
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    },
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          },
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            "binary_version": "3.1.13-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "openexr",
        "purl": "pkg:deb/ubuntu/openexr@3.1.13-2?arch=source\u0026distro=questing"
      },
      "ranges": [
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      ],
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      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
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          {
            "binary_name": "libopenexr-3-1-30",
            "binary_version": "3.1.13-2ubuntu0.26.04.1~esm1"
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        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:26.04:LTS",
        "name": "openexr",
        "purl": "pkg:deb/ubuntu/openexr@3.1.13-2ubuntu0.26.04.1~esm1?arch=source\u0026distro=esm-apps/resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.13-2ubuntu0.26.04.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.13-2",
        "3.1.13-2build1"
      ]
    }
  ],
  "aliases": [],
  "details": "OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.1.0 to before 3.2.7, 3.3.9, and 3.4.9, internal_exr_undo_piz() advances the working wavelet pointer with signed 32-bit arithmetic. Because nx, ny, and wcount are int, a crafted EXR file can make this product overflow and wrap. The next channel then decodes from an incorrect address. The wavelet decode path operates in place, so this yields both out-of-bounds reads and out-of-bounds writes. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.",
  "id": "UBUNTU-CVE-2026-34588",
  "modified": "2026-06-30T16:20:56Z",
  "published": "2026-04-06T16:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-34588"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-34588"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-588r-cr5c-w6hf"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/pull/2328"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/commit/e464a33cc5bcd9f7dad2364bf76c08a52a5b0fbf"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/commit/ea588c8f075f5915e34931861e15b6c2d3b62561"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/commit/ca0139287918775e1fddc0ed0033d694bec033ff"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8259-1"
    }
  ],
  "related": [
    "USN-8259-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-34588"
  ]
}

WID-SEC-W-2026-1440

Vulnerability from csaf_certbund - Published: 2026-05-10 22:00 - Updated: 2026-05-19 22:00

Summary

Red Hat Enterprise Linux (openEXR): Schwachstelle ermöglicht Codeausführung

Severity

Hoch

Scope

1 vulnerability in this advisory, including CVE-2026-34588.

CVE-2026-34588

Known affected: 7 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-34588 (GCVE-0-2026-34588)

RHSA-2026:30088

RHSA-2026:30089

rlsa-2026:19146

Vulnerability from osv_rocky

SUSE-SU-2026:21372-1

ubuntu-cve-2026-34588

Vulnerability from osv_ubuntu

WID-SEC-W-2026-1440

Tags

Sightings

Nomenclature

Related by attack behaviour