{"id":"CVE-2026-97949","revision":"d954373208544ab7be82cd2f5984e582","records":[{"revision":"d954373208544ab7be82cd2f5984e582","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-97949","aliases":[],"title":"configfs: unhash the dentry before dropping the item in rmdir","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nconfigfs: unhash the dentry before dropping the item in rmdir\n\nconfigfs_get_config_item() treats a hashed dentry as proof that\nsd->s_element is a live config_item.  configfs_rmdir() breaks that:\nsimple_rmdir() leaves the dentry hashed, the last reference to the item is\ndropped right after, and the dentry is only unhashed by d_delete() once\n->rmdir() has returned.  configfs_symlink() resolves its target holding no\nlock on it, so get_target() can land in that window:\n\n  BUG: KASAN: slab-use-after-free in config_item_get+0x26/0x90\n   get_target fs/configfs/symlink.c:128 [inline]\n   configfs_symlink+0x4ab/0x1030 fs/configfs/symlink.c:185\n\nUnhash in configfs_remove_dir(), while the item is still guaranteed to be\nthere.  A reference obtained just before that stays harmless, as\ncreate_link() rechecks CONFIGFS_USET_DROPPING, already set by\nconfigfs_detach_prep().  Both configfs_unregister_subsystem() paths\nd_drop() after detaching, so this only makes rmdir match them.","state":0,"publishedAt":"2026-09-25T10:22:58.375+00:00","modifiedAt":"2026-10-21T12:53:47.6+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                        \"fs/configfs/dir.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7063fbf2261194f72ee75afca67b3b38b554b5fa\",\n                            \"lessThan\": \"b315d865660766d45ecdbf7433a4e3d36a554b3b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7063fbf2261194f72ee75afca67b3b38b554b5fa\",\n                            \"lessThan\": \"446720051d44eebaa81b33969173160057b73a33\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7063fbf2261194f72ee75afca67b3b38b554b5fa\",\n                            \"lessThan\": \"5d7cbfb65e47cc71d5d94d87d5d0d1679080f3eb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7063fbf2261194f72ee75afca67b3b38b554b5fa\",\n                            \"lessThan\": \"925d8564f1b2d9b46c5ab63b9bc942cea006da9b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7063fbf2261194f72ee75afca67b3b38b554b5fa\",\n                            \"lessThan\": \"f06c2d26d1999d37e93299db0ecead04ca7d0b9f\",\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                        \"fs/configfs/dir.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.16\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.16\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.160\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.7\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/b315d865660766d45ecdbf7433a4e3d36a554b3b","https://git.kernel.org/stable/c/446720051d44eebaa81b33969173160057b73a33","https://git.kernel.org/stable/c/5d7cbfb65e47cc71d5d94d87d5d0d1679080f3eb","https://git.kernel.org/stable/c/925d8564f1b2d9b46c5ab63b9bc942cea006da9b","https://git.kernel.org/stable/c/f06c2d26d1999d37e93299db0ecead04ca7d0b9f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-97949","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-97949","identifiers":["CVE-2026-97949"]},"retained":false,"historicalAffected":[]}],"coverage":[]}