{"id":"CVE-2026-34588","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 w…","severity":"high","cvss":8.6,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-125","CWE-190","CWE-787"],"vendor":"AcademySoftwareFoundation","product":"openexr","affected":["openexr >= 3.1.0, <= 3.1.13","openexr >= 3.2.0, < 3.2.7","openexr >= 3.3.0, < 3.3.9","openexr >= 3.4.0, < 3.4.9"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-04-07T03:56:04.356566Z"},"published":"2026-04-06","updated":"2026-09-09","sourceUpdated":"2026-09-09T12:05:01.982Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-34588","references":[{"url":"https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-588r-cr5c-w6hf","label":"https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-588r-cr5c-w6hf"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7","label":"https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9","label":"https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9","label":"https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34588.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-34588"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2455408"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-34588"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34588"},{"url":"https://access.redhat.com/errata/RHSA-2026:17656"},{"url":"https://access.redhat.com/errata/RHSA-2026:15888"},{"url":"https://access.redhat.com/errata/RHSA-2026:19146"},{"url":"https://access.redhat.com/errata/RHSA-2026:19587"},{"url":"https://access.redhat.com/errata/RHSA-2026:17659"},{"url":"https://access.redhat.com/errata/RHSA-2026:17658"},{"url":"https://access.redhat.com/errata/RHSA-2026:17660"},{"url":"https://access.redhat.com/errata/RHSA-2026:15887"},{"url":"https://access.redhat.com/errata/RHSA-2026:19359"},{"url":"https://access.redhat.com/errata/RHSA-2026:30078"},{"url":"https://access.redhat.com/errata/RHSA-2026:30089"},{"url":"https://access.redhat.com/errata/RHSA-2026:30088"},{"url":"https://access.redhat.com/errata/RHSA-2026:30087"},{"url":"https://github.com/AcademySoftwareFoundation/openexr"}],"tags":["cve.org","csaf","vex","red-hat","osv","pip"],"epss":0.00482,"epssPercentile":0.40589,"aliases":["GHSA-588r-cr5c-w6hf","PYSEC-2026-2845"],"ecosystem":"pip","patched":["enterprise_linux_appstream_eus_v_10_0","enterprise_linux_appstream_v_10","enterprise_linux_appstream_e4s_v_9_0","enterprise_linux_appstream_e4s_v_9_2","enterprise_linux_appstream_eus_v_9_4","enterprise_linux_appstream_eus_v_9_6","enterprise_linux_appstream_v_9","enterprise_linux_codeready_linux_builder_eus_v_10_0","enterprise_linux_codeready_linux_builder_v_10","codeready_linux_builder_eus_v_9_4","codeready_linux_builder_eus_v_9_6","enterprise_linux_codeready_linux_builder_v_9","ai_inference_server 3.3"],"scores":{"cna":8.6,"vendor":8.8},"ingestedAt":"2026-07-13T18:57:53.072Z","slug":"CVE-2026-34588","body":"## Overview\n\nOpenEXR 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.\n\n## Affected\n\n- `openexr >= 3.1.0, <= 3.1.13`\n- `openexr >= 3.2.0, < 3.2.7`\n- `openexr >= 3.3.0, < 3.3.9`\n- `openexr >= 3.4.0, < 3.4.9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-34588)\n\nAffected packages:\n\n- `openexr >= 3.1.0, < 3.2.7`\n- `openexr >= 3.3.0, < 3.3.9`\n- `openexr >= 3.4.0, < 3.4.9`\n\nPatched in:\n\n- `openexr 3.2.7`\n- `openexr 3.3.9`\n- `openexr 3.4.9`\n\nSource: https://osv.dev/vulnerability/GHSA-588r-cr5c-w6hf\n\n## Vendor advisories\n\n- **RHSA-2026:17656** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · released 2026-05-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:17656)\n- **RHSA-2026:15888** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-05-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:15888)\n- **RHSA-2026:19146** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-05-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:19146)\n- **RHSA-2026:19587** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.0) · released 2026-05-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:19587)\n- **RHSA-2026:17659** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2) · released 2026-05-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:17659)\n- **RHSA-2026:17658** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.4), Red Hat CodeReady Linux Builder EUS (v.9.4) · released 2026-05-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:17658)\n- **RHSA-2026:17660** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat CodeReady Linux Builder EUS (v.9.6) · released 2026-05-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:17660)\n- **RHSA-2026:15887** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-05-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:15887)\n- **RHSA-2026:19359** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-05-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:19359)\n- **RHSA-2026:30078** · Red Hat · fixed in: Red Hat AI Inference Server 3.3 · released 2026-06-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:30078)\n- **RHSA-2026:30089** · Red Hat · fixed in: Red Hat AI Inference Server 3.3 · released 2026-06-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:30089)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · updated 2026-09-08 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34588.json)","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":47.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":201612,"id":"CVE-2026-34588","ts":1789399527931,"field":"cvss","old":"8.8","new":"8.6"},{"seq":200344,"id":"CVE-2026-34588","ts":1789397127734,"field":"cvss","old":"8.6","new":"8.8"},{"seq":198268,"id":"CVE-2026-34588","ts":1789391777247,"field":"cvss","old":"8.8","new":"8.6"},{"seq":196061,"id":"CVE-2026-34588","ts":1789383422092,"field":"cvss","old":"8.6","new":"8.8"},{"seq":194990,"id":"CVE-2026-34588","ts":1789380329182,"field":"cvss","old":"8.8","new":"8.6"},{"seq":193777,"id":"CVE-2026-34588","ts":1789378288475,"field":"cvss","old":"8.6","new":"8.8"},{"seq":192564,"id":"CVE-2026-34588","ts":1789376253989,"field":"cvss","old":"8.8","new":"8.6"},{"seq":191351,"id":"CVE-2026-34588","ts":1789373156437,"field":"cvss","old":"8.6","new":"8.8"},{"seq":190136,"id":"CVE-2026-34588","ts":1789369141255,"field":"cvss","old":"8.8","new":"8.6"},{"seq":188923,"id":"CVE-2026-34588","ts":1789368057356,"field":"cvss","old":"8.6","new":"8.8"},{"seq":187706,"id":"CVE-2026-34588","ts":1789365014482,"field":"cvss","old":"8.8","new":"8.6"},{"seq":186493,"id":"CVE-2026-34588","ts":1789363031958,"field":"cvss","old":"8.6","new":"8.8"},{"seq":185279,"id":"CVE-2026-34588","ts":1789360974982,"field":"cvss","old":"8.8","new":"8.6"},{"seq":184066,"id":"CVE-2026-34588","ts":1789357957930,"field":"cvss","old":"8.6","new":"8.8"},{"seq":182318,"id":"CVE-2026-34588","ts":1789354113646,"field":"cvss","old":"8.8","new":"8.6"},{"seq":181111,"id":"CVE-2026-34588","ts":1789352970829,"field":"cvss","old":"8.6","new":"8.8"},{"seq":179904,"id":"CVE-2026-34588","ts":1789350018834,"field":"cvss","old":"8.8","new":"8.6"},{"seq":178697,"id":"CVE-2026-34588","ts":1789347847571,"field":"cvss","old":"8.6","new":"8.8"},{"seq":177490,"id":"CVE-2026-34588","ts":1789346196548,"field":"cvss","old":"8.8","new":"8.6"},{"seq":176283,"id":"CVE-2026-34588","ts":1789342769541,"field":"cvss","old":"8.6","new":"8.8"},{"seq":175737,"id":"CVE-2026-34588","ts":1789338580254,"field":"cvss","old":"8.8","new":"8.6"},{"seq":175607,"id":"CVE-2026-34588","ts":1789338398688,"field":"cvss","old":"8.6","new":"8.8"},{"seq":174402,"id":"CVE-2026-34588","ts":1789334610021,"field":"cvss","old":"8.8","new":"8.6"},{"seq":173197,"id":"CVE-2026-34588","ts":1789333243604,"field":"cvss","old":"8.6","new":"8.8"},{"seq":172011,"id":"CVE-2026-34588","ts":1789330909013,"field":"cvss","old":"8.8","new":"8.6"},{"seq":170825,"id":"CVE-2026-34588","ts":1789328415090,"field":"cvss","old":"8.6","new":"8.8"},{"seq":169620,"id":"CVE-2026-34588","ts":1789326930911,"field":"cvss","old":"8.8","new":"8.6"},{"seq":168415,"id":"CVE-2026-34588","ts":1789323469304,"field":"cvss","old":"8.6","new":"8.8"},{"seq":167210,"id":"CVE-2026-34588","ts":1789319391762,"field":"cvss","old":"8.8","new":"8.6"},{"seq":166005,"id":"CVE-2026-34588","ts":1789318322407,"field":"cvss","old":"8.6","new":"8.8"},{"seq":164800,"id":"CVE-2026-34588","ts":1789315561709,"field":"cvss","old":"8.8","new":"8.6"},{"seq":163595,"id":"CVE-2026-34588","ts":1789313283220,"field":"cvss","old":"8.6","new":"8.8"},{"seq":162390,"id":"CVE-2026-34588","ts":1789311729133,"field":"cvss","old":"8.8","new":"8.6"},{"seq":161185,"id":"CVE-2026-34588","ts":1789308293777,"field":"cvss","old":"8.6","new":"8.8"},{"seq":160690,"id":"CVE-2026-34588","ts":1789304229656,"field":"cvss","old":"8.8","new":"8.6"},{"seq":158528,"id":"CVE-2026-34588","ts":1789299310201,"field":"cvss","old":"8.6","new":"8.8"},{"seq":157492,"id":"CVE-2026-34588","ts":1789296475432,"field":"cvss","old":"8.8","new":"8.6"},{"seq":156287,"id":"CVE-2026-34588","ts":1789294411141,"field":"cvss","old":"8.6","new":"8.8"},{"seq":155082,"id":"CVE-2026-34588","ts":1789292653209,"field":"cvss","old":"8.8","new":"8.6"},{"seq":153877,"id":"CVE-2026-34588","ts":1789289377843,"field":"cvss","old":"8.6","new":"8.8"},{"seq":153089,"id":"CVE-2026-34588","ts":1789285287147,"field":"cvss","old":"8.8","new":"8.6"},{"seq":148023,"id":"CVE-2026-34588","ts":1789270894241,"field":"cvss","old":"8.6","new":"8.8"},{"seq":146063,"id":"CVE-2026-34588","ts":1789269185861,"field":"cvss","old":"8.8","new":"8.6"},{"seq":144966,"id":"CVE-2026-34588","ts":1789266134516,"field":"cvss","old":"8.6","new":"8.8"},{"seq":143870,"id":"CVE-2026-34588","ts":1789262455491,"field":"cvss","old":"8.8","new":"8.6"},{"seq":142706,"id":"CVE-2026-34588","ts":1789261213816,"field":"cvss","old":"8.6","new":"8.8"},{"seq":141542,"id":"CVE-2026-34588","ts":1789258628210,"field":"cvss","old":"8.8","new":"8.6"},{"seq":140344,"id":"CVE-2026-34588","ts":1789256433839,"field":"cvss","old":"8.6","new":"8.8"},{"seq":139146,"id":"CVE-2026-34588","ts":1789254608069,"field":"cvss","old":"8.8","new":"8.6"},{"seq":137948,"id":"CVE-2026-34588","ts":1789251601092,"field":"cvss","old":"8.6","new":"8.8"}]}