CVE-2026-97950

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97950", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:18:58.205Z", "datePublished": "2026-09-25T10:22:58.970Z", "dateUpdated": "2026-10-21T12:53:48.740Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:53:48.740Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/configfs/symlink.c"], "versions": [{"version": "7063fbf2261194f72ee75afca67b3b38b554b5fa", "lessThan": "a44744454eafbc158e8c8e3ef8d207076410b195", "status": "affected", "versionType": "git"}, {"version": "7063fbf2261194f72ee75afca67b3b38b554b5fa", "lessThan": "846ff40fd57a47e59a41f4e331ec3b34efaddc23", "status": "affected", "versionType": "git"}, {"version": "7063fbf2261194f72ee75afca67b3b38b554b5fa", "lessThan": "4f54beb2e7f6d399396466682fba3539bcdcb414", "status": "affected", "versionType": "git"}, {"version": "7063fbf2261194f72ee75afca67b3b38b554b5fa", "lessThan": "d47c5de1cd6bfbe1067fc310bf90e4e00205e839", "status": "affected", "versionType": "git"}, {"version": "7063fbf2261194f72ee75afca67b3b38b554b5fa", "lessThan": "a7c1290eef60711c10289c056ad32ed1f2b47b12", "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/symlink.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/a44744454eafbc158e8c8e3ef8d207076410b195"}, {"url": "https://git.kernel.org/stable/c/846ff40fd57a47e59a41f4e331ec3b34efaddc23"}, {"url": "https://git.kernel.org/stable/c/4f54beb2e7f6d399396466682fba3539bcdcb414"}, {"url": "https://git.kernel.org/stable/c/d47c5de1cd6bfbe1067fc310bf90e4e00205e839"}, {"url": "https://git.kernel.org/stable/c/a7c1290eef60711c10289c056ad32ed1f2b47b12"}], "title": "configfs: pin the symlink target's dirent instead of chasing ->ci_dentry", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/configfs/symlink.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "a44744454eafbc158e8c8e3ef8d207076410b195", "status": "affected", "version": "7063fbf2261194f72ee75afca67b3b38b554b5fa", "versionType": "git"}, {"lessThan": "846ff40fd57a47e59a41f4e331ec3b34efaddc23", "status": "affected", "version": "7063fbf2261194f72ee75afca67b3b38b554b5fa", "versionType": "git"}, {"lessThan": "4f54beb2e7f6d399396466682fba3539bcdcb414", "status": "affected", "version": "7063fbf2261194f72ee75afca67b3b38b554b5fa", "versionType": "git"}, {"lessThan": "d47c5de1cd6bfbe1067fc310bf90e4e00205e839", "status": "affected", "version": "7063fbf2261194f72ee75afca67b3b38b554b5fa", "versionType": "git"}, {"lessThan": "a7c1290eef60711c10289c056ad32ed1f2b47b12", "status": "affected", "version": "7063fbf2261194f72ee75afca67b3b38b554b5fa", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/configfs/symlink.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: 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."}], "id": "CVE-2026-97950", "lastModified": "2026-10-21T13:21:17.320", "metrics": {}, "published": "2026-09-25T11:17:22.567", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4f54beb2e7f6d399396466682fba3539bcdcb414"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/846ff40fd57a47e59a41f4e331ec3b34efaddc23"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a44744454eafbc158e8c8e3ef8d207076410b195"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a7c1290eef60711c10289c056ad32ed1f2b47b12"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d47c5de1cd6bfbe1067fc310bf90e4e00205e839"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: configfs: pin the symlink target's dirent instead of chasing ->ci_dentry", "id": "2541253", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541253"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's configfs filesystem. A local user could exploit a race condition between creating a symbolic link and deleting its target directory to cause a Denial of Service (DoS). When this race condition occurs, the kernel attempts to access a freed directory entry, which can lead to an inconsistent state or a system crash."], "name": "CVE-2026-97950", "public_date": "2026-09-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-97950\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-97950\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97950.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7063fbf2261194f72ee75afca67b3b38b554b5fa,4f54beb2e7f6d399396466682fba3539bcdcb414)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7063fbf2261194f72ee75afca67b3b38b554b5fa,d47c5de1cd6bfbe1067fc310bf90e4e00205e839)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7063fbf2261194f72ee75afca67b3b38b554b5fa,a7c1290eef60711c10289c056ad32ed1f2b47b12)"}}], "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": "generic", "value": "[6.18.53,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.7,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "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": "2026-09-25T18:30:17.212220+00:00", "updated": "2026-10-01T08:45:03.643067+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}