{"id":"CVE-2026-55371","aliases":["BELL-CVE-2026-55371","DEBIAN-CVE-2026-55371","EUVD-2026-65184","GHSA-xx72-f24p-cf6r","UBUNTU-CVE-2026-55371","openSUSE-SU-2026:11218-1"],"status":"published","title":"OpenEXR: OpenEXRCore exr_attr_set_bytes() accepts NULL type_hint with positive hint_length","description":"OpenEXR is the reference implementation and specification for the EXR high-dynamic-range image file format, widely used in the motion picture industry. Versions 3.4.0 through 3.4.12 contain a NULL pointer dereference in the OpenEXRCore function exr_attr_set_bytes(). The public setter validates the top-level exr_attr_bytes_t value pointer but does not verify that the nested type_hint pointer is non-NULL when hint_length is greater than zero. When a caller supplies a positive hint_length together with a NULL type_hint, exr_attr_bytes_create() allocates a destination type-hint buffer and then copies from the NULL source pointer, causing a deterministic crash. The flaw is reachable through the public OpenEXRCore C API and results in a denial of service. The issue is fixed in version 3.4.13.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00167,"percentile":0.06042,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20","CWE-476"],"published":"2026-07-08T00:00:00Z","modified":"2026-11-07T13:00:08Z","fixes":[{"ecosystem":"Alpaquita:stream","package":"openexr","fixed_in":["3.4.13-r0"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"openexr","fixed_in":["3.4.14-0.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpaquita:stream","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.4-r0"},{"fixed":"3.4.13-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.13-1","3.1.13-2","3.1.5-5","3.1.5-5.1","3.1.5-5.1+hurd.1","3.4.14-0.1","3.4.15+ds-1","3.4.16+ds-1","3.4.6+ds-1","3.4.6+ds-2","3.4.6+ds-3","3.4.6+ds-4","3.5.2+ds-1"]},{"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":"Ubuntu:Pro:16.04:LTS","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.0-1ubuntu3","2.2.0-7ubuntu1","2.2.0-9ubuntu1","2.2.0-10ubuntu2","2.2.0-10ubuntu2.1","2.2.0-10ubuntu2.2","2.2.0-10ubuntu2.3","2.2.0-10ubuntu2.4","2.2.0-10ubuntu2.6","2.2.0-10ubuntu2.6+esm1","2.2.0-10ubuntu2.6+esm2","2.2.0-10ubuntu2.6+esm3","2.2.0-10ubuntu2.6+esm4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.0-11ubuntu1","2.2.0-11.1ubuntu1","2.2.0-11.1ubuntu1.1","2.2.0-11.1ubuntu1.2","2.2.0-11.1ubuntu1.3","2.2.0-11.1ubuntu1.4","2.2.0-11.1ubuntu1.6","2.2.0-11.1ubuntu1.7","2.2.0-11.1ubuntu1.8","2.2.0-11.1ubuntu1.9","2.2.0-11.1ubuntu1.9+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.1-4.1ubuntu1","2.3.0-6","2.3.0-6build1","2.3.0-6ubuntu0.1","2.3.0-6ubuntu0.2","2.3.0-6ubuntu0.3","2.3.0-6ubuntu0.5","2.3.0-6ubuntu0.5+esm1","2.3.0-6ubuntu0.5+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.5.4-2","2.5.7-1","2.5.7-1ubuntu0.1~esm1","2.5.7-1ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.5-5.1","3.1.5-5.1build1","3.1.5-5.1build2","3.1.5-5.1build3","3.1.5-5.1ubuntu0.1~esm1"]},{"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":"Ubuntu:Pro:26.04:LTS","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.13-2","3.1.13-2build1","3.1.13-2ubuntu0.26.04.1~esm1"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"openexr","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.13-1.1"}]}],"bundled":5}],"products":[{"vendor":"academysoftwarefoundation","product":"openexr"}],"references":[{"url":"https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-xx72-f24p-cf6r","tags":["x_refsource_CONFIRM","advisory"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2026-55371","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55371.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55371","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-55371","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-55371","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-55371","tags":["report"]},{"url":"https://github.com/academysoftwarefoundation/openexr/security/advisories/ghsa-xx72-f24p-cf6r","tags":["report"]},{"url":"https://github.com/cveproject/cvelistv5/tree/main/cves/2026/55xxx/cve-2026-55371.json","tags":["report"]},{"url":"https://nvd.nist.gov/vuln/detail/cve-2026-55371","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-53532","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-54920","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-55059","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-55371","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-55373","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-55371","title":"OpenEXR: OpenEXRCore exr_attr_set_bytes() accepts NULL type_hint with positive hint_length","description":"OpenEXR is the reference implementation and specification for the EXR high-dynamic-range image file format, widely used in the motion picture industry. Versions 3.4.0 through 3.4.12 contain a NULL pointer dereference in the OpenEXRCore function exr_attr_set_bytes(). The public setter validates the top-level exr_attr_bytes_t value pointer but does not verify that the nested type_hint pointer is non-NULL when hint_length is greater than zero. When a caller supplies a positive hint_length together with a NULL type_hint, exr_attr_bytes_create() allocates a destination type-hint buffer and then copies from the NULL source pointer, causing a deterministic crash. The flaw is reachable through the public OpenEXRCore C API and results in a denial of service. The issue is fixed in version 3.4.13.","status":"published","published":"2026-08-25T00:31:35.995Z","modified":"2026-08-25T19:22:48.186Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-20","CWE-476"],"updated_at":"2026-11-02T14:20:11.925815Z"}],"euvd":[{"id":"EUVD-2026-65184","description":"OpenEXR is the reference implementation and specification for the EXR high-dynamic-range image file format, widely used in the motion picture industry. Versions 3.4.0 through 3.4.12 contain a NULL pointer dereference in the OpenEXRCore function exr_attr_set_bytes(). The public setter validates the top-level exr_attr_bytes_t value pointer but does not verify that the nested type_hint pointer is non-NULL when hint_length is greater than zero. When a caller supplies a positive hint_length together with a NULL type_hint, exr_attr_bytes_create() allocates a destination type-hint buffer and then copies from the NULL source pointer, causing a deterministic crash. The flaw is reachable through the public OpenEXRCore C API and results in a denial of service. The issue is fixed in version 3.4.13.","status":"published","published":"2026-08-25T00:31:35Z","modified":"2026-08-25T19:22:48Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:01:31.718552Z"}],"nvd":[{"id":"CVE-2026-55371","description":"OpenEXR is the reference implementation and specification for the EXR high-dynamic-range image file format, widely used in the motion picture industry. Versions 3.4.0 through 3.4.12 contain a NULL pointer dereference in the OpenEXRCore function exr_attr_set_bytes(). The public setter validates the top-level exr_attr_bytes_t value pointer but does not verify that the nested type_hint pointer is non-NULL when hint_length is greater than zero. When a caller supplies a positive hint_length together with a NULL type_hint, exr_attr_bytes_create() allocates a destination type-hint buffer and then copies from the NULL source pointer, causing a deterministic crash. The flaw is reachable through the public OpenEXRCore C API and results in a denial of service. The issue is fixed in version 3.4.13.","status":"published","published":"2026-08-25T01:16:36.81Z","modified":"2026-10-12T15:10:00.207Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-20","CWE-476"],"updated_at":"2026-11-02T14:12:41.018848Z"}],"osv":[{"id":"CVE-2026-55371","title":"OpenEXR: OpenEXRCore exr_attr_set_bytes() accepts NULL type_hint with positive hint_length","description":"OpenEXR is the reference implementation and specification for the EXR high-dynamic-range image file format, widely used in the motion picture industry. Versions 3.4.0 through 3.4.12 contain a NULL pointer dereference in the OpenEXRCore function exr_attr_set_bytes(). The public setter validates the top-level exr_attr_bytes_t value pointer but does not verify that the nested type_hint pointer is non-NULL when hint_length is greater than zero. When a caller supplies a positive hint_length together with a NULL type_hint, exr_attr_bytes_create() allocates a destination type-hint buffer and then copies from the NULL source pointer, causing a deterministic crash. The flaw is reachable through the public OpenEXRCore C API and results in a denial of service. The issue is fixed in version 3.4.13.","status":"published","published":"2026-08-25T00:31:35.995Z","modified":"2026-10-28T02:30:22.043062882Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-20","CWE-476"],"updated_at":"2026-11-02T15:45:11.22012Z"},{"id":"DEBIAN-CVE-2026-55371","description":"OpenEXR is the reference implementation and specification for the EXR high-dynamic-range image file format, widely used in the motion picture industry. Versions 3.4.0 through 3.4.12 contain a NULL pointer dereference in the OpenEXRCore function exr_attr_set_bytes(). The public setter validates the top-level exr_attr_bytes_t value pointer but does not verify that the nested type_hint pointer is non-NULL when hint_length is greater than zero. When a caller supplies a positive hint_length together with a NULL type_hint, exr_attr_bytes_create() allocates a destination type-hint buffer and then copies from the NULL source pointer, causing a deterministic crash. The flaw is reachable through the public OpenEXRCore C API and results in a denial of service. The issue is fixed in version 3.4.13.","status":"published","published":"2026-08-25T01:16:36.81Z","modified":"2026-11-07T13:00:08.791612496Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"updated_at":"2026-11-07T13:16:37.331514Z"},{"id":"UBUNTU-CVE-2026-55371","description":"OpenEXR is the reference implementation and specification for the EXR high-dynamic-range image file format, widely used in the motion picture industry. Versions 3.4.0 through 3.4.12 contain a NULL pointer dereference in the OpenEXRCore function exr_attr_set_bytes(). The public setter validates the top-level exr_attr_bytes_t value pointer but does not verify that the nested type_hint pointer is non-NULL when hint_length is greater than zero. When a caller supplies a positive hint_length together with a NULL type_hint, exr_attr_bytes_create() allocates a destination type-hint buffer and then copies from the NULL source pointer, causing a deterministic crash. The flaw is reachable through the public OpenEXRCore C API and results in a denial of service. The issue is fixed in version 3.4.13.","status":"published","published":"2026-08-25T01:16:00Z","modified":"2026-10-17T12:59:08.008015777Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"},{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:56:41.382716Z"},{"id":"BELL-CVE-2026-55371","status":"published","published":"2026-08-27T06:10:26.742646Z","modified":"2026-09-05T07:15:06.62820756Z","updated_at":"2026-11-02T15:28:24.657778Z"},{"id":"openSUSE-SU-2026:11218-1","title":"libIex-3_4-33-3.4.13-1.1 on GA media","description":"These are all security issues fixed in the libIex-3_4-33-3.4.13-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-07-08T00:00:00Z","modified":"2026-07-09T10:00:13.439590855Z","updated_at":"2026-11-02T16:58:38.95195Z"}]}}