{"id":"CVE-2026-34378","aliases":["ALPINE-CVE-2026-34378","BELL-CVE-2026-34378","CLSA-2026-1785335342","CLSA-2026-1785425808","DEBIAN-CVE-2026-34378","EUVD-2026-19303","GHSA-v76p-4qvv-vh4g","JLSEC-2026-142","UBUNTU-CVE-2026-34378","openSUSE-SU-2026:10505-1"],"status":"published","title":"OpenEXR has a signed integer overflow in generic_unpack() when parsing EXR files with crafted negative dataWindow.min.x","description":"OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00272,"percentile":0.19785,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-190"],"published":"2026-04-06T15:19:34Z","modified":"2026-11-03T06:32:54Z","fixes":[{"ecosystem":"Alpine:v3.22","package":"openexr","fixed_in":["3.3.11-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"openexr","fixed_in":["3.4.13-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"openexr","fixed_in":["3.4.10-r0"],"sources":["osv"]},{"ecosystem":"Alpaquita:stream","package":"openexr","fixed_in":["3.4.9-r0"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"openexr","fixed_in":["3.4.14-0.1"],"sources":["osv"]},{"ecosystem":"Julia","package":"OpenEXR_jll","fixed_in":["3.4.9+0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.22","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.0"},{"fixed":"3.3.11-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.0"},{"fixed":"3.4.13-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.0"},{"fixed":"3.4.10-r0"}]}]},{"source":"osv","ecosystem":"Alpaquita:stream","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.4-r0"},{"fixed":"3.4.9-r0"}]}]},{"source":"osv","ecosystem":"TuxCare:AlmaLinux:9.2","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.1-3.el9.tuxcare.els9"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:AlmaLinux:9.2","package":"openexr-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.1-3.el9.tuxcare.els9"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:AlmaLinux:9.2","package":"openexr-libs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.1-3.el9.tuxcare.els9"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:AlmaLinux:9.6","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.1-3.el9.tuxcare.els9"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:AlmaLinux:9.6","package":"openexr-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.1-3.el9.tuxcare.els9"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:AlmaLinux:9.6","package":"openexr-libs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.1-3.el9.tuxcare.els9"}]}],"bundled":2},{"source":"osv","ecosystem":"Debian:14","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.14-0.1"}]}],"versions":["3.1.13-2","3.4.6+ds-1","3.4.6+ds-2","3.4.6+ds-3","3.4.6+ds-4"]},{"source":"osv","ecosystem":"Julia","package":"OpenEXR_jll","ranges":[{"type":"SEMVER","events":[{"introduced":"3.4.4+0"},{"fixed":"3.4.9+0"}]}]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.13-2build1","3.4.6+ds-4ubuntu3"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.9-1.1"}]}],"bundled":8}],"products":[{"vendor":"academysoftwarefoundation","product":"openexr"},{"vendor":"openexr","product":"openexr"}],"references":[{"url":"https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-v76p-4qvv-vh4g","tags":["x_refsource_CONFIRM","Exploit","Vendor Advisory","advisory","web","report"]},{"url":"https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9","tags":["x_refsource_MISC","Product","Release Notes","web","report"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-34378","tags":["advisory"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2026-34378","tags":["advisory"]},{"url":"https://errata.tuxcare.com/els_os/almalinux9.2esu/CLSA-2026-1785335342.html","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34378","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34380","tags":["advisory"]},{"url":"https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1785425808.html","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34378.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-34378","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-34378","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-34378","tags":["report"]},{"url":"https://github.com/AcademySoftwareFoundation/openexr/pull/2321","tags":["report"]},{"url":"https://github.com/AcademySoftwareFoundation/openexr/commit/088859fb6199e56824c4c9ed60afc825261bfea9","tags":["report"]},{"url":"https://github.com/AcademySoftwareFoundation/openexr/commit/7a1c64ca74d12bf5f64a912d4e12a651689f8652","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-34378","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-34379","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-34380","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-34543","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-34544","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-34545","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-34588","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-34589","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-34378","title":"OpenEXR has a signed integer overflow in generic_unpack() when parsing EXR files with crafted negative dataWindow.min.x","description":"OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.","status":"published","published":"2026-04-06T15:19:34.871Z","modified":"2026-04-07T03:07:17.341Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:20:13.962274Z"}],"euvd":[{"id":"EUVD-2026-19303","description":"OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.","status":"published","published":"2026-04-06T15:19:34Z","modified":"2026-04-07T03:07:17Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T19:25:15.380284Z"}],"nvd":[{"id":"CVE-2026-34378","description":"OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.","status":"published","published":"2026-04-06T16:16:35.057Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:12:13.1424Z"}],"osv":[{"id":"ALPINE-CVE-2026-34378","description":"OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.","status":"published","published":"2026-04-06T16:16:35.057Z","modified":"2026-11-03T06:32:54.782438678Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T07:16:26.770911Z"},{"id":"BELL-CVE-2026-34378","status":"published","published":"2026-04-07T06:09:08.97115Z","modified":"2026-04-09T07:20:31.06069Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:28:23.572955Z"},{"id":"CVE-2026-34378","title":"OpenEXR has a signed integer overflow in generic_unpack() when parsing EXR files with crafted negative dataWindow.min.x","description":"OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.","status":"published","published":"2026-04-06T15:19:34.871Z","modified":"2026-10-28T02:31:03.236242828Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T15:45:02.247031Z"},{"id":"DEBIAN-CVE-2026-34378","description":"OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.","status":"published","published":"2026-04-06T16:16:35.057Z","modified":"2026-10-27T09:47:29.41079633Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:54.587575Z"},{"id":"JLSEC-2026-142","description":"OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in `generic_unpack()`. By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.","status":"published","published":"2026-04-17T15:19:54.657Z","modified":"2026-07-25T18:23:47.393657166Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:47:18.159338Z"},{"id":"UBUNTU-CVE-2026-34378","description":"OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.","status":"published","published":"2026-04-06T16:16:00Z","modified":"2026-10-17T13:00:01.050597326Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:56:16.036833Z"},{"id":"CLSA-2026-1785335342","title":"openexr: Fix of 2 CVEs","description":"- CVE-2026-34380: fix signed 32-bit integer overflow in the PXR24 decoder\n  bounds check, where (uint64_t) (w * 3) wrapped to a small positive value\n  and allowed an out-of-bounds write through dout\n- CVE-2026-34378: fix signed 32-bit integer overflow in srcbuffer pointer\n  arithmetic in the unpack_* routines, reached via an oversized dataWindow\n  width","status":"published","published":"2026-07-29T14:29:13Z","modified":"2026-10-26T09:43:59.547399298Z","updated_at":"2026-11-02T15:43:46.482572Z"},{"id":"CLSA-2026-1785425808","title":"openexr: Fix of 2 CVEs","description":"- CVE-2026-34380: fix signed 32-bit integer overflow in the PXR24 decoder\n  bounds check, where (uint64_t) (w * 3) wrapped to a small positive value\n  and allowed an out-of-bounds write through dout\n- CVE-2026-34378: fix signed 32-bit integer overflow in srcbuffer pointer\n  arithmetic in the unpack_* routines, reached via an oversized dataWindow\n  width","status":"published","published":"2026-07-30T15:37:00Z","modified":"2026-10-26T09:43:54.857287211Z","updated_at":"2026-11-02T15:43:46.850893Z"},{"id":"openSUSE-SU-2026:10505-1","title":"libIex-3_4-33-3.4.9-1.1 on GA media","description":"These are all security issues fixed in the libIex-3_4-33-3.4.9-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-04-08T00:00:00Z","modified":"2026-04-09T08:00:37.097659Z","updated_at":"2026-11-02T16:58:38.415593Z"}]}}