{"id":"CVE-2026-64421","state":"PUBLISHED","title":"media: nxp: imx8-isi: Fix use-after-free on remove","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: nxp: imx8-isi: Fix use-after-free on remove\n\nKASAN reports a slab-use-after-free in __media_entity_remove_link()\nduring rmmod of imx8_isi:\n\n  BUG: KASAN: slab-use-after-free in __media_entity_remove_link+0x608/0x650\n  Read of size 2 at addr ffff0000d47cb02a by task rmmod/724\n\n  Call trace:\n   __media_entity_remove_link+0x608/0x650\n   __media_entity_remove_links+0x78/0x144\n   __media_device_unregister_entity+0x150/0x280\n   media_device_unregister_entity+0x48/0x68\n   v4l2_device_unregister_subdev+0x158/0x300\n   v4l2_async_unbind_subdev_one+0x22c/0x358\n   v4l2_async_nf_unbind_all_subdevs+0xfc/0x1c0\n   v4l2_async_nf_unregister+0x5c/0x14c\n   mxc_isi_remove+0x124/0x2a0 [imx8_isi]\n\n  Allocated by task 249:\n   __kmalloc_noprof+0x27c/0x690\n   mxc_isi_crossbar_init+0x22c/0x560 [imx8_isi]\n\n  Freed by task 724:\n   kfree+0x1e4/0x5b0\n   mxc_isi_crossbar_cleanup+0x34/0x80 [imx8_isi]\n   mxc_isi_remove+0x11c/0x2a0 [imx8_isi]\n\nThe problem is that mxc_isi_remove() calls mxc_isi_crossbar_cleanup()\nbefore mxc_isi_v4l2_cleanup(). The crossbar cleanup frees the media\nentity pads, but the subsequent v4l2 cleanup still tries to remove\nmedia links that reference those pads.\n\nFix this by calling mxc_isi_v4l2_cleanup() before\nmxc_isi_crossbar_cleanup() to ensure all media entities are properly\nunregistered while the pads are still valid.","publishedAt":"2026-07-25T08:50:59.926Z","updatedAt":"2026-08-17T04:55:21.058Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cf21f328fcafacf4f96e7a30ef9dceede1076378","status":"affected","lessThan":"d22fb719654bfde6f682c9f14629f5f9534175b7","versionType":"git"},{"version":"cf21f328fcafacf4f96e7a30ef9dceede1076378","status":"affected","lessThan":"ba2aa5d325270cd965c44458c5ff5ab555e6af51","versionType":"git"},{"version":"cf21f328fcafacf4f96e7a30ef9dceede1076378","status":"affected","lessThan":"ef382a6baf0a95cf199fdf6bba2fd08e58b0a249","versionType":"git"},{"version":"cf21f328fcafacf4f96e7a30ef9dceede1076378","status":"affected","lessThan":"c12a5b2261351cd3b03921ce4720332ff5184b50","versionType":"git"},{"version":"cf21f328fcafacf4f96e7a30ef9dceede1076378","status":"affected","lessThan":"b670bf89824ede5d07d20bb9bfbafb754846081d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c"]}],"references":["https://git.kernel.org/stable/c/d22fb719654bfde6f682c9f14629f5f9534175b7","https://git.kernel.org/stable/c/ba2aa5d325270cd965c44458c5ff5ab555e6af51","https://git.kernel.org/stable/c/ef382a6baf0a95cf199fdf6bba2fd08e58b0a249","https://git.kernel.org/stable/c/c12a5b2261351cd3b03921ce4720332ff5184b50","https://git.kernel.org/stable/c/b670bf89824ede5d07d20bb9bfbafb754846081d"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64421.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64421","state":"PUBLISHED","datePublished":"2026-07-25T08:50:59.926Z","dateUpdated":"2026-08-17T04:55:21.058Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.786Z"},"containers":{"cna":{"title":"media: nxp: imx8-isi: Fix use-after-free on remove","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: nxp: imx8-isi: Fix use-after-free on remove\n\nKASAN reports a slab-use-after-free in __media_entity_remove_link()\nduring rmmod of imx8_isi:\n\n  BUG: KASAN: slab-use-after-free in __media_entity_remove_link+0x608/0x650\n  Read of size 2 at addr ffff0000d47cb02a by task rmmod/724\n\n  Call trace:\n   __media_entity_remove_link+0x608/0x650\n   __media_entity_remove_links+0x78/0x144\n   __media_device_unregister_entity+0x150/0x280\n   media_device_unregister_entity+0x48/0x68\n   v4l2_device_unregister_subdev+0x158/0x300\n   v4l2_async_unbind_subdev_one+0x22c/0x358\n   v4l2_async_nf_unbind_all_subdevs+0xfc/0x1c0\n   v4l2_async_nf_unregister+0x5c/0x14c\n   mxc_isi_remove+0x124/0x2a0 [imx8_isi]\n\n  Allocated by task 249:\n   __kmalloc_noprof+0x27c/0x690\n   mxc_isi_crossbar_init+0x22c/0x560 [imx8_isi]\n\n  Freed by task 724:\n   kfree+0x1e4/0x5b0\n   mxc_isi_crossbar_cleanup+0x34/0x80 [imx8_isi]\n   mxc_isi_remove+0x11c/0x2a0 [imx8_isi]\n\nThe problem is that mxc_isi_remove() calls mxc_isi_crossbar_cleanup()\nbefore mxc_isi_v4l2_cleanup(). The crossbar cleanup frees the media\nentity pads, but the subsequent v4l2 cleanup still tries to remove\nmedia links that reference those pads.\n\nFix this by calling mxc_isi_v4l2_cleanup() before\nmxc_isi_crossbar_cleanup() to ensure all media entities are properly\nunregistered while the pads are still valid."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cf21f328fcafacf4f96e7a30ef9dceede1076378","status":"affected","lessThan":"d22fb719654bfde6f682c9f14629f5f9534175b7","versionType":"git"},{"version":"cf21f328fcafacf4f96e7a30ef9dceede1076378","status":"affected","lessThan":"ba2aa5d325270cd965c44458c5ff5ab555e6af51","versionType":"git"},{"version":"cf21f328fcafacf4f96e7a30ef9dceede1076378","status":"affected","lessThan":"ef382a6baf0a95cf199fdf6bba2fd08e58b0a249","versionType":"git"},{"version":"cf21f328fcafacf4f96e7a30ef9dceede1076378","status":"affected","lessThan":"c12a5b2261351cd3b03921ce4720332ff5184b50","versionType":"git"},{"version":"cf21f328fcafacf4f96e7a30ef9dceede1076378","status":"affected","lessThan":"b670bf89824ede5d07d20bb9bfbafb754846081d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/platform/nxp/imx8-isi/imx8-isi-core.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d22fb719654bfde6f682c9f14629f5f9534175b7"},{"url":"https://git.kernel.org/stable/c/ba2aa5d325270cd965c44458c5ff5ab555e6af51"},{"url":"https://git.kernel.org/stable/c/ef382a6baf0a95cf199fdf6bba2fd08e58b0a249"},{"url":"https://git.kernel.org/stable/c/c12a5b2261351cd3b03921ce4720332ff5184b50"},{"url":"https://git.kernel.org/stable/c/b670bf89824ede5d07d20bb9bfbafb754846081d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:55:21.058Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}