{"id":"CVE-2026-97950","revision":"2af8c44f82bf40f1bea32119969b41be","records":[{"revision":"2af8c44f82bf40f1bea32119969b41be","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-97950","aliases":[],"title":"configfs: pin the symlink target's dirent instead of chasing ->ci_dentry","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nconfigfs: pin the symlink target's dirent instead of chasing ->ci_dentry\n\ncreate_link() reads the target's configfs_dirent from\nitem->ci_dentry->d_fsdata, relying on the item reference taken by\nget_target().  That reference pins the item, not its dentry: the dentry is\npinned by DCACHE_PERSISTENT, which configfs_remove_dir() releases via\nsimple_rmdir() while the item is still alive.  A symlink racing with rmdir\nof its target can therefore find ->ci_dentry freed and its dirent\nreleased, triggering WARN_ON(!atomic_read(&sd->s_count)) in configfs_get().\n\nTake the dirent in get_target() as well, under ->d_lock and atomically\nwith the item reference, and pass it down to create_link().  A hashed\ndentry has not been killed yet, so its ->d_fsdata reference keeps the\ndirent alive there.","state":0,"publishedAt":"2026-09-25T10:22:58.97+00:00","modifiedAt":"2026-10-21T12:53:48.74+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/symlink.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7063fbf2261194f72ee75afca67b3b38b554b5fa\",\n                            \"lessThan\": \"a44744454eafbc158e8c8e3ef8d207076410b195\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7063fbf2261194f72ee75afca67b3b38b554b5fa\",\n                            \"lessThan\": \"846ff40fd57a47e59a41f4e331ec3b34efaddc23\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7063fbf2261194f72ee75afca67b3b38b554b5fa\",\n                            \"lessThan\": \"4f54beb2e7f6d399396466682fba3539bcdcb414\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7063fbf2261194f72ee75afca67b3b38b554b5fa\",\n                            \"lessThan\": \"d47c5de1cd6bfbe1067fc310bf90e4e00205e839\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7063fbf2261194f72ee75afca67b3b38b554b5fa\",\n                            \"lessThan\": \"a7c1290eef60711c10289c056ad32ed1f2b47b12\",\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/symlink.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/a44744454eafbc158e8c8e3ef8d207076410b195","https://git.kernel.org/stable/c/846ff40fd57a47e59a41f4e331ec3b34efaddc23","https://git.kernel.org/stable/c/4f54beb2e7f6d399396466682fba3539bcdcb414","https://git.kernel.org/stable/c/d47c5de1cd6bfbe1067fc310bf90e4e00205e839","https://git.kernel.org/stable/c/a7c1290eef60711c10289c056ad32ed1f2b47b12"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-97950","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-97950","identifiers":["CVE-2026-97950"]},"retained":false,"historicalAffected":[]}],"coverage":[]}