CVE-2026-97949

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97949", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:18:58.205Z", "datePublished": "2026-09-25T10:22:58.375Z", "dateUpdated": "2026-10-21T12:53:47.600Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:53:47.600Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/configfs/dir.c"], "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"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/configfs/dir.c"], "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"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.16", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.16", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.16", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.16", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.16", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b315d865660766d45ecdbf7433a4e3d36a554b3b"}, {"url": "https://git.kernel.org/stable/c/446720051d44eebaa81b33969173160057b73a33"}, {"url": "https://git.kernel.org/stable/c/5d7cbfb65e47cc71d5d94d87d5d0d1679080f3eb"}, {"url": "https://git.kernel.org/stable/c/925d8564f1b2d9b46c5ab63b9bc942cea006da9b"}, {"url": "https://git.kernel.org/stable/c/f06c2d26d1999d37e93299db0ecead04ca7d0b9f"}], "title": "configfs: unhash the dentry before dropping the item in rmdir", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/configfs/dir.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b315d865660766d45ecdbf7433a4e3d36a554b3b", "status": "affected", "version": "7063fbf2261194f72ee75afca67b3b38b554b5fa", "versionType": "git"}, {"lessThan": "446720051d44eebaa81b33969173160057b73a33", "status": "affected", "version": "7063fbf2261194f72ee75afca67b3b38b554b5fa", "versionType": "git"}, {"lessThan": "5d7cbfb65e47cc71d5d94d87d5d0d1679080f3eb", "status": "affected", "version": "7063fbf2261194f72ee75afca67b3b38b554b5fa", "versionType": "git"}, {"lessThan": "925d8564f1b2d9b46c5ab63b9bc942cea006da9b", "status": "affected", "version": "7063fbf2261194f72ee75afca67b3b38b554b5fa", "versionType": "git"}, {"lessThan": "f06c2d26d1999d37e93299db0ecead04ca7d0b9f", "status": "affected", "version": "7063fbf2261194f72ee75afca67b3b38b554b5fa", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/configfs/dir.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.16"}, {"lessThan": "2.6.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-97949", "lastModified": "2026-10-21T13:21:17.213", "metrics": {}, "published": "2026-09-25T11:17:22.453", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/446720051d44eebaa81b33969173160057b73a33"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5d7cbfb65e47cc71d5d94d87d5d0d1679080f3eb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/925d8564f1b2d9b46c5ab63b9bc942cea006da9b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b315d865660766d45ecdbf7433a4e3d36a554b3b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f06c2d26d1999d37e93299db0ecead04ca7d0b9f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: configfs: unhash the dentry before dropping the item in rmdir", "id": "2541021", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541021"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's configfs filesystem. A race condition between directory removal and symbolic link creation can result in a use-after-free vulnerability, where the system attempts to access memory after it has been released. A local user can exploit this flaw by concurrently deleting a directory while creating a symbolic link targeting it, leading to a Denial of Service (DoS) through a kernel crash or potential memory corruption."], "name": "CVE-2026-97949", "public_date": "2026-09-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-97949\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-97949\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97949.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7063fbf2261194f72ee75afca67b3b38b554b5fa,5d7cbfb65e47cc71d5d94d87d5d0d1679080f3eb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7063fbf2261194f72ee75afca67b3b38b554b5fa,925d8564f1b2d9b46c5ab63b9bc942cea006da9b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7063fbf2261194f72ee75afca67b3b38b554b5fa,f06c2d26d1999d37e93299db0ecead04ca7d0b9f)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.7,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-25T15:00:20.850738+00:00", "updated": "2026-10-01T11:15:05.770577+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}