{"id":"CVE-2026-74359","revision":"4749ee4d581b48f2b1c49441c74e0c61","records":[{"revision":"4749ee4d581b48f2b1c49441c74e0c61","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74359","aliases":[],"title":"configfs_lookup(): don't leave ->s_dentry dangling on failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nconfigfs_lookup(): don't leave ->s_dentry dangling on failure\n\nNormally ->s_dentry is cleared when dentry it's pointing to becomes\nnegative (on eviction, realistically).  However, that only happens\nif dentry gets to be positive in the first place; in case of inode\nallocation failure dentry never becomes positive, so ->d_iput()\nis not called at all.\n\nWe do part of what normally would've been done by configfs_d_iput()\n(dropping the reference to configfs_dirent) manually, but we do\nnot clear ->s_dentry there.  Sloppy as it is, it does not matter in\ncase of configfs_create_{dir,link}() - there configfs_dirent does\nnot survive dropping the sole reference to it.\n\nHowever, for configfs_lookup() it *does* survive, with a dangling\npointer to soon to be freed dentry sitting it its ->s_dentry.\n\nSubsequent getdents(2) in that directory will end up dereferencing\nthat pointer in order to pick the inode number.  Use after free...\n\nThis is the minimal fix; the right approach is to set the linkage\nbetween dentry and configfs_dirent only after we know that we have\nan inode, but that takes more surgery and the bug had been there\nsince 2006, so...","state":0,"publishedAt":"2026-08-15T05:58:43.456+00:00","modifiedAt":"2026-10-16T18:55:35.328+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\": \"3d0f89bb169482d26d5aa4e82e763077e7e9bc4d\",\n                            \"lessThan\": \"3e83b2203aa59bd279e4f677ec793d49dc9d019e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3d0f89bb169482d26d5aa4e82e763077e7e9bc4d\",\n                            \"lessThan\": \"b6e9c82522ddaa3ac0706b295ff4a71975d4f883\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3d0f89bb169482d26d5aa4e82e763077e7e9bc4d\",\n                            \"lessThan\": \"eee07d769da5ac4e4f7bd0bc17828646a318d499\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3d0f89bb169482d26d5aa4e82e763077e7e9bc4d\",\n                            \"lessThan\": \"9c747dcee164ead300de90550ad9e4122f0d1bbb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3d0f89bb169482d26d5aa4e82e763077e7e9bc4d\",\n                            \"lessThan\": \"c3b073a209a9baa691b744318ac929fecdd8847c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3d0f89bb169482d26d5aa4e82e763077e7e9bc4d\",\n                            \"lessThan\": \"57088b06109f3222963c639d8d743f42c2899b13\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3d0f89bb169482d26d5aa4e82e763077e7e9bc4d\",\n                            \"lessThan\": \"10da12d352b7b2bb330a8609fdda9a58bf0e9856\",\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\": \"5.15.212\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.178\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.97\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.40\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\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/3e83b2203aa59bd279e4f677ec793d49dc9d019e","https://git.kernel.org/stable/c/b6e9c82522ddaa3ac0706b295ff4a71975d4f883","https://git.kernel.org/stable/c/eee07d769da5ac4e4f7bd0bc17828646a318d499","https://git.kernel.org/stable/c/9c747dcee164ead300de90550ad9e4122f0d1bbb","https://git.kernel.org/stable/c/c3b073a209a9baa691b744318ac929fecdd8847c","https://git.kernel.org/stable/c/57088b06109f3222963c639d8d743f42c2899b13","https://git.kernel.org/stable/c/10da12d352b7b2bb330a8609fdda9a58bf0e9856"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74359","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74359","identifiers":["CVE-2026-74359"]},"retained":false,"historicalAffected":[]}],"coverage":[]}