{"id":"CVE-2022-48931","state":"PUBLISHED","title":"configfs: fix a race in configfs_{,un}register_subsystem()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nconfigfs: fix a race in configfs_{,un}register_subsystem()\n\nWhen configfs_register_subsystem() or configfs_unregister_subsystem()\nis executing link_group() or unlink_group(),\nit is possible that two processes add or delete list concurrently.\nSome unfortunate interleavings of them can cause kernel panic.\n\nOne of cases is:\nA --> B --> C --> D\nA <-- B <-- C <-- D\n\n     delete list_head *B        |      delete list_head *C\n--------------------------------|-----------------------------------\nconfigfs_unregister_subsystem   |   configfs_unregister_subsystem\n  unlink_group                  |     unlink_group\n    unlink_obj                  |       unlink_obj\n      list_del_init             |         list_del_init\n        __list_del_entry        |           __list_del_entry\n          __list_del            |             __list_del\n            // next == C        |\n            next->prev = prev   |\n                                |               next->prev = prev\n            prev->next = next   |\n                                |                 // prev == B\n                                |                 prev->next = next\n\nFix this by adding mutex when calling link_group() or unlink_group(),\nbut parent configfs_subsystem is NULL when config_item is root.\nSo I create a mutex configfs_subsystem_mutex.","publishedAt":"2024-08-22T03:31:24.823Z","updatedAt":"2026-05-11T18:49:55.167Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"40805099af11f68c5ca7dbcfacf455da8f99f622","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"d1654de19d42f513b6cfe955cc77e7f427e05a77","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"a37024f7757c25550accdebf49e497ad6ae239fe","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"b7e2b91fcb5c78c414e33dc8d50642e307ca0c5a","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"a7ab53d3c27dfe83bb594456b9f38a37796ec39b","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"e7a66dd2687758718eddd79b542a95cf3aa488cc","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"3aadfd46858b1f64d4d6a0654b863e21aabff975","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"84ec758fb2daa236026506868c8796b0500c047d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/configfs/dir.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.16","versionType":"semver"},{"version":"4.9.304","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.269","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.232","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.182","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.103","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.26","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16.12","status":"unaffected","lessThanOrEqual":"5.16.*","versionType":"semver"},{"version":"5.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/configfs/dir.c"]}],"references":["https://git.kernel.org/stable/c/40805099af11f68c5ca7dbcfacf455da8f99f622","https://git.kernel.org/stable/c/d1654de19d42f513b6cfe955cc77e7f427e05a77","https://git.kernel.org/stable/c/a37024f7757c25550accdebf49e497ad6ae239fe","https://git.kernel.org/stable/c/b7e2b91fcb5c78c414e33dc8d50642e307ca0c5a","https://git.kernel.org/stable/c/a7ab53d3c27dfe83bb594456b9f38a37796ec39b","https://git.kernel.org/stable/c/e7a66dd2687758718eddd79b542a95cf3aa488cc","https://git.kernel.org/stable/c/3aadfd46858b1f64d4d6a0654b863e21aabff975","https://git.kernel.org/stable/c/84ec758fb2daa236026506868c8796b0500c047d"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/48xxx/CVE-2022-48931.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-48931","state":"PUBLISHED","datePublished":"2024-08-22T03:31:24.823Z","dateUpdated":"2026-05-11T18:49:55.167Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-08-21T06:06:23.299Z"},"containers":{"cna":{"title":"configfs: fix a race in configfs_{,un}register_subsystem()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nconfigfs: fix a race in configfs_{,un}register_subsystem()\n\nWhen configfs_register_subsystem() or configfs_unregister_subsystem()\nis executing link_group() or unlink_group(),\nit is possible that two processes add or delete list concurrently.\nSome unfortunate interleavings of them can cause kernel panic.\n\nOne of cases is:\nA --> B --> C --> D\nA <-- B <-- C <-- D\n\n     delete list_head *B        |      delete list_head *C\n--------------------------------|-----------------------------------\nconfigfs_unregister_subsystem   |   configfs_unregister_subsystem\n  unlink_group                  |     unlink_group\n    unlink_obj                  |       unlink_obj\n      list_del_init             |         list_del_init\n        __list_del_entry        |           __list_del_entry\n          __list_del            |             __list_del\n            // next == C        |\n            next->prev = prev   |\n                                |               next->prev = prev\n            prev->next = next   |\n                                |                 // prev == B\n                                |                 prev->next = next\n\nFix this by adding mutex when calling link_group() or unlink_group(),\nbut parent configfs_subsystem is NULL when config_item is root.\nSo I create a mutex configfs_subsystem_mutex."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"40805099af11f68c5ca7dbcfacf455da8f99f622","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"d1654de19d42f513b6cfe955cc77e7f427e05a77","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"a37024f7757c25550accdebf49e497ad6ae239fe","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"b7e2b91fcb5c78c414e33dc8d50642e307ca0c5a","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"a7ab53d3c27dfe83bb594456b9f38a37796ec39b","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"e7a66dd2687758718eddd79b542a95cf3aa488cc","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"3aadfd46858b1f64d4d6a0654b863e21aabff975","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","status":"affected","lessThan":"84ec758fb2daa236026506868c8796b0500c047d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/configfs/dir.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.16","versionType":"semver"},{"version":"4.9.304","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.269","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.232","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.182","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.103","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.26","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16.12","status":"unaffected","lessThanOrEqual":"5.16.*","versionType":"semver"},{"version":"5.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/configfs/dir.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/40805099af11f68c5ca7dbcfacf455da8f99f622"},{"url":"https://git.kernel.org/stable/c/d1654de19d42f513b6cfe955cc77e7f427e05a77"},{"url":"https://git.kernel.org/stable/c/a37024f7757c25550accdebf49e497ad6ae239fe"},{"url":"https://git.kernel.org/stable/c/b7e2b91fcb5c78c414e33dc8d50642e307ca0c5a"},{"url":"https://git.kernel.org/stable/c/a7ab53d3c27dfe83bb594456b9f38a37796ec39b"},{"url":"https://git.kernel.org/stable/c/e7a66dd2687758718eddd79b542a95cf3aa488cc"},{"url":"https://git.kernel.org/stable/c/3aadfd46858b1f64d4d6a0654b863e21aabff975"},{"url":"https://git.kernel.org/stable/c/84ec758fb2daa236026506868c8796b0500c047d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T18:49:55.167Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"4.9.304"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"4.14.269"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"4.19.232"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.4.182"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.10.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.15.26"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.16.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.17"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA 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