{"schema":"threatline.record/2","record":{"id":"CVE-2026-97949","aliases":[],"summary":"configfs: unhash the dentry before dropping the item in rmdir","details":"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.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97949","source_modified_at":"2026-10-21T12:53:47.600Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","lessThan":"b315d865660766d45ecdbf7433a4e3d36a554b3b","status":"affected","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","lessThan":"446720051d44eebaa81b33969173160057b73a33","status":"affected","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","lessThan":"5d7cbfb65e47cc71d5d94d87d5d0d1679080f3eb","status":"affected","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","lessThan":"925d8564f1b2d9b46c5ab63b9bc942cea006da9b","status":"affected","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","lessThan":"f06c2d26d1999d37e93299db0ecead04ca7d0b9f","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97949","source_modified_at":"2026-10-21T12:53:47.600Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"2.6.16","status":"affected"},{"version":"0","lessThan":"2.6.16","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.7","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97949","source_modified_at":"2026-10-21T12:53:47.600Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"446720051d44eebaa81b33969173160057b73a33","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97949","source_modified_at":"2026-10-21T12:53:47.600Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"5d7cbfb65e47cc71d5d94d87d5d0d1679080f3eb","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97949","source_modified_at":"2026-10-21T12:53:47.600Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"925d8564f1b2d9b46c5ab63b9bc942cea006da9b","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00168,"percentile":0.05752,"score_date":"2026-10-23"},"published_at":"2026-09-25T10:22:58.375Z","modified_at":"2026-10-21T12:53:47.600Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-97949","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:53:47.600Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-97949","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/b315d865660766d45ecdbf7433a4e3d36a554b3b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/446720051d44eebaa81b33969173160057b73a33"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/5d7cbfb65e47cc71d5d94d87d5d0d1679080f3eb"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/925d8564f1b2d9b46c5ab63b9bc942cea006da9b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/f06c2d26d1999d37e93299db0ecead04ca7d0b9f"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-21T12:53:47.600Z","content_hash":"f6537c64805f7dbc0b48b9f49ed4ba2f3f6f1dadf6a48961cf7512ec2a21ff1f"}}