{"id":"CVE-2026-46210","revision":"b8d49c75ee524ca9908169a6d9d28287","records":[{"revision":"b8d49c75ee524ca9908169a6d9d28287","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-46210","aliases":[],"title":"media: iris: fix use-after-free of fmt_src during MBPF check","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: iris: fix use-after-free of fmt_src during MBPF check\n\nDuring concurrency testing, multiple instances can run in parallel, and\neach instance uses its own inst->lock while the core->lock protects the\nlist of active instances. The race happens because these locks cover\ndifferent scopes, inst->lock protects only the internals of a single\ninstance, while the Macro Blocks Per Frame (MBPF) checker walks the\ncore list under core->lock and reads fields like fmt_src->width and\nfmt_src->height. At the same time, iris_close() may free fmt_src and\nfmt_dst under inst->lock while the instance is still present in the core\nlist. This allows a situation where the MBPF checker, still iterating\nthrough the core list, reaches an instance whose fmt_src was already\nfreed by another thread and ends up dereferencing a dangling pointer,\nresulting in a use-after-free. This happens because the MBPF checker\nassumes that any instance in the core list is fully valid, but the\nfreeing of fmt_src and fmt_dst without removing the instance from the\ncore list is not correct.\n\nThe correct ordering is to defer freeing fmt_src and fmt_dst until after\nthe instance has been removed from the core list and all teardown under\nthe core lock has completed, ensuring that no dangling pointers are ever\nexposed during MBPF checks.","state":0,"publishedAt":"2026-05-28T09:40:27.884+00:00","modifiedAt":"2026-10-15T10:07:25.926+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/media/platform/qcom/iris/iris_vdec.c\",\n                        \"drivers/media/platform/qcom/iris/iris_vdec.h\",\n                        \"drivers/media/platform/qcom/iris/iris_venc.c\",\n                        \"drivers/media/platform/qcom/iris/iris_venc.h\",\n                        \"drivers/media/platform/qcom/iris/iris_vidc.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5ad964ad5656668399f00c76707f0d063b64a4b1\",\n                            \"lessThan\": \"96889fcdb0988108a19a29b0467717a503651a73\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5ad964ad5656668399f00c76707f0d063b64a4b1\",\n                            \"lessThan\": \"494ffd1712a588e590e6b1e9f876a8c8b24a9180\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5ad964ad5656668399f00c76707f0d063b64a4b1\",\n                            \"lessThan\": \"3d9593ad1a58c5acc3e5fa2a48222bb7632e6812\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/media/platform/qcom/iris/iris_vdec.c\",\n                        \"drivers/media/platform/qcom/iris/iris_vdec.h\",\n                        \"drivers/media/platform/qcom/iris/iris_venc.c\",\n                        \"drivers/media/platform/qcom/iris/iris_venc.h\",\n                        \"drivers/media/platform/qcom/iris/iris_vidc.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.18\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.18\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.57\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.9\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/96889fcdb0988108a19a29b0467717a503651a73","https://git.kernel.org/stable/c/494ffd1712a588e590e6b1e9f876a8c8b24a9180","https://git.kernel.org/stable/c/3d9593ad1a58c5acc3e5fa2a48222bb7632e6812"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-46210","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-46210","identifiers":["CVE-2026-46210"]},"retained":false,"historicalAffected":[]}],"coverage":[]}