{"id":"CVE-2026-112402","summary":"Pillow: Double free in ImagingScaleAffine on calloc failure via Image.transform","details":"Pillow is a Python imaging library. Prior to 13.0.0, Pillow can double free image memory when ImagingScaleAffine encounters a selective allocation failure. The affected fast path handles Transform.EXTENT or pure scale-and-translate Transform.AFFINE operations with the default NEAREST resampling. The output image allocation must succeed while the additional per-column lookup allocation fails, after which the error path deletes image storage that later cleanup releases again. An attacker who can drive such a large Image.transform() operation under memory pressure may trigger the failure. This can crash the process and may corrupt memory. This issue is fixed in version 13.0.0.","aliases":["GHSA-7mwm-ghpf-9vrm"],"modified":"2026-10-21T09:40:04.946252559Z","published":"2026-10-19T21:18:57.027Z","database_specific":{"cwe_ids":["CWE-416"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112402.json","unresolved_ranges":[{"extracted_events":[{"strategy":"StringRangeExpression","range":[{"fixed":"13.0.0"}],"source":"AFFECTED_FIELD"}]},{"extracted_events":[{"source":"DESCRIPTION","range":[{"fixed":"13.0.0"},{"fixed":"13.0.0"}]}]}],"cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112402.json"},{"type":"FIX","url":"https://github.com/python-pillow/Pillow/commit/aafa6c75f7cdabb9f409a8aac7c780bea31d08d9"},{"type":"WEB","url":"https://github.com/python-pillow/Pillow/releases/tag/13.0.0"},{"type":"ADVISORY","url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-7mwm-ghpf-9vrm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112402"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/python-pillow/pillow","events":[{"introduced":"0"},{"fixed":"aafa6c75f7cdabb9f409a8aac7c780bea31d08d9"},{"fixed":"293218ad059d994baf1777d882911bed6a49704a"}],"database_specific":{"extracted_events":[{"source":"REFERENCES_COMMIT","range":[{"fixed":"aafa6c75f7cdabb9f409a8aac7c780bea31d08d9"}]},{"source":"REFERENCES_TAG","original_tag":"13.0.0","range":[{"fixed":"293218ad059d994baf1777d882911bed6a49704a"}]}]}}],"versions":["12.3.0","12.2.0","12.1.0","12.0.0","11.3.0","11.2.1","11.1.0","11.0.0","10.4.0","10.3.0","10.2.0","10.1.0","10.0.0","9.5.0","9.4.0","9.3.0","9.2.0","9.1.0","9.0.0","8.4.0","8.3.0","8.2.0","8.1.0","8.0.0","7.2.0","7.1.0","7.0.0","6.2.0","6.1.0","6.0.0","5.4.0","5.3.0","5.2.0","5.1.0","5.0.0","4.3.0","4.2.0","4.1.0","4.0.0","4.0.0a","3.4.0","3.3.0","3.2.0","3.1.0","3.1.0-rc1","2.9.0","2.9.0.dev2","2.9.0.dev1","2.9.0.dev0","2.8.1","2.8.0","2.7.0","2.5.0","2.3.0","2.2.1","2.2.0","2.1.0","2.0.0","1.7.8","1.7.7","1.2","1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112402.json","vanir_signatures":[{"target":{"file":"src/_imaging.c","function":"_resize"},"deprecated":false,"digest":{"length":1510,"function_hash":"249917818182199755458341376879466064233"},"id":"CVE-2026-112402-52cc2a6a","signature_type":"Function","signature_version":"v1","source":"https://github.com/python-pillow/pillow/commit/aafa6c75f7cdabb9f409a8aac7c780bea31d08d9"},{"target":{"file":"src/_imaging.c"},"deprecated":false,"digest":{"threshold":0.9,"line_hashes":["321313457675946189401323870737251954232","262075159384788929128693991217614199416","193452582567030081844053633648415191004","7909764332128986786411623258513436347","26734643465617584029251126093880481802","162035368954354079429599006203809381539","129792897804934971887985543136768959113"]},"id":"CVE-2026-112402-55549ad1","signature_type":"Line","signature_version":"v1","source":"https://github.com/python-pillow/pillow/commit/aafa6c75f7cdabb9f409a8aac7c780bea31d08d9"},{"digest":{"function_hash":"4526551501969283430959639219046268106","length":1606},"id":"CVE-2026-112402-d60276bf","signature_type":"Function","signature_version":"v1","source":"https://github.com/python-pillow/pillow/commit/aafa6c75f7cdabb9f409a8aac7c780bea31d08d9","target":{"file":"src/libImaging/Geometry.c","function":"ImagingScaleAffine"},"deprecated":false},{"deprecated":false,"digest":{"line_hashes":["288980435302019702101910813519152890468","70702820797238706893230707488435886291","240382660006110556071239605694321459564","165713518888442145485659497522317710091"],"threshold":0.9},"id":"CVE-2026-112402-edaa2fac","signature_type":"Line","signature_version":"v1","source":"https://github.com/python-pillow/pillow/commit/aafa6c75f7cdabb9f409a8aac7c780bea31d08d9","target":{"file":"src/libImaging/Geometry.c"}}],"vanir_signatures_modified":"2026-10-21T09:40:04Z"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}