{"id":"CVE-2026-64447","summary":"staging: media: ipu7: fix double-free and use-after-free in error paths","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: media: ipu7: fix double-free and use-after-free in error paths\n\nIn both ipu7_isys_init() and ipu7_psys_init(), pdata is allocated and\nthen passed to ipu7_bus_initialize_device(), which stores it in\nadev-\u003epdata. The ipu7_bus_release() function frees adev-\u003epdata when the\ndevice's reference count drops to zero.\n\nTwo error paths incorrectly call kfree(pdata) after the device teardown\nhas already freed it:\n\n1. When ipu7_mmu_init() fails: put_device() is called, which drops the\n   reference count to zero and triggers ipu7_bus_release() -\u003e\n   kfree(pdata). The subsequent kfree(pdata) is a double-free.\n\n2. When ipu7_bus_add_device() fails: it calls auxiliary_device_uninit()\n   internally, which calls put_device() -\u003e ipu7_bus_release() -\u003e\n   kfree(pdata). The subsequent kfree(pdata) is again a double-free.\n\nNote that the kfree(pdata) when ipu7_bus_initialize_device() itself\nfails is correct, because in that case auxiliary_device_init() failed\nand the release function was never set up, so pdata must be freed\nmanually.\n\nAdditionally, the error code was not saved before calling put_device(),\ncausing ERR_CAST() to dereference the already-freed adev pointer when\nconstructing the return value. Fix this by saving the error from\ndev_err_probe() before put_device() and returning ERR_PTR() instead.\n\nRemove the redundant kfree(pdata) calls and fix the use-after-free in\nthe return values of the two affected error paths.","modified":"2026-07-28T04:03:08.291371262Z","published":"2026-07-25T08:51:18.096Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64447.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/837c1f9655421055f751ed34745e820a54a27642"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b5ddc7257bee71f5b8cf9083e2b0ac0427e9fbb3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d3a9a8cf2d7fd61a2f63df61f6cbc0a9bb007cc0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64447.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64447"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b7fe4c0019b12d60ece3e99eeb0ccfd5a1d103e5"},{"fixed":"b5ddc7257bee71f5b8cf9083e2b0ac0427e9fbb3"},{"fixed":"837c1f9655421055f751ed34745e820a54a27642"},{"fixed":"d3a9a8cf2d7fd61a2f63df61f6cbc0a9bb007cc0"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64447.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.17.0"},{"fixed":"6.18.39"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64447.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}