{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97584", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T16:01:01.156Z", "datePublished": "2026-09-25T10:22:04.322Z", "dateUpdated": "2026-09-25T14:41:25.662Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-25T14:41:25.662Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: Fix incorrect free in candidate cleanup in afs_lookup_server()\n\nFix afs_lookup_server() to not free an existing server's endpoint state\nwhen cleaning up a candidate server. The candidate record doesn't have an\nendpoint state yet at this point, so the free for that can just be removed."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - afs_lookup_server() is reached through afs_create_volume()/afs_update_volume_state() -> afs_alloc_server_list() when a local process walks a kAFS path (for example /afs/<cell>/<vol> automount) or uses a volume. Nothing malformed comes off the wire. The defect is local cleanup logic that frees the wrong object, so the attacker needs a local account on the AFS client.\nAC:L - The candidate is left non-NULL when afs_install_server() returns an existing record. That happens when the attacker runs parallel lookups of volumes on the same fileserver UUID, or accesses the path again after a creation attempt failed and left the record marked UNCREATED. Both states come from the attacker's own path accesses; neither depends on outside conditions.\nPR:L - Mounting kAFS needs CAP_SYS_ADMIN (no FS_USERNS_MOUNT). On a client that already has the /afs dynroot mounted, any unprivileged user can start the volume and server lookups that reach afs_lookup_server() just by accessing /afs/<cell>/... paths.\nUI:N - No victim action is needed; the attacker triggers the lookups and the faulty cleanup with their own filesystem accesses.\nS:U - The memory corruption stays inside the kernel's own security authority; no VM, IOMMU or sandbox boundary is crossed.\nC:H - The cleanup at the out: label kfree()s the existing server's live, refcounted afs_endpoint_state. server->endpoint_state and in-flight probe/rotate operations still reference it, giving a use-after-free of a sprayable kmalloc object that can be reclaimed to leak kernel data.\nI:H - After the bad kfree(), afs_put_endpoint_state() and the probe code keep writing refcounts, flags and the addresses pointer into the freed estate. When the refcount later drops to zero it is freed a second time via call_rcu, so a reclaimed object gets corrupted.\nA:H - The freed estate is later used and double-freed, and on the create_failed and wait_for_creation failure paths `server` is NULL when server->endpoint_state is read. Either way the kernel oopses or panics."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/afs/server.c"], "versions": [{"version": "d6aa05cd995830f6dcee7b139335edb266de38a6", "lessThan": "981d72663dee2fa6efaf202293e68d2b10a0d1d4", "status": "affected", "versionType": "git"}, {"version": "4882ba78574e2d8c579658f65f6784b0d139d173", "lessThan": "e5bc0fa9959dc8f7eb1afab7c039594a16a1a65c", "status": "affected", "versionType": "git"}, {"version": "4882ba78574e2d8c579658f65f6784b0d139d173", "lessThan": "349e713039a1fd6659c27e7a66238bfa49ce37e9", "status": "affected", "versionType": "git"}, {"version": "4882ba78574e2d8c579658f65f6784b0d139d173", "lessThan": "044d596094af4b769fb8e1173dff0d08bd68db6c", "status": "affected", "versionType": "git"}, {"version": "6.12.101", "lessThan": "6.12.111", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/afs/server.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "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-rc3", "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": "6.12.101", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.3-rc3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/981d72663dee2fa6efaf202293e68d2b10a0d1d4"}, {"url": "https://git.kernel.org/stable/c/e5bc0fa9959dc8f7eb1afab7c039594a16a1a65c"}, {"url": "https://git.kernel.org/stable/c/349e713039a1fd6659c27e7a66238bfa49ce37e9"}, {"url": "https://git.kernel.org/stable/c/044d596094af4b769fb8e1173dff0d08bd68db6c"}], "title": "afs: Fix incorrect free in candidate cleanup in afs_lookup_server()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/afs/server.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "981d72663dee2fa6efaf202293e68d2b10a0d1d4", "status": "affected", "version": "d6aa05cd995830f6dcee7b139335edb266de38a6", "versionType": "git"}, {"lessThan": "e5bc0fa9959dc8f7eb1afab7c039594a16a1a65c", "status": "affected", "version": "4882ba78574e2d8c579658f65f6784b0d139d173", "versionType": "git"}, {"lessThan": "349e713039a1fd6659c27e7a66238bfa49ce37e9", "status": "affected", "version": "4882ba78574e2d8c579658f65f6784b0d139d173", "versionType": "git"}, {"lessThan": "044d596094af4b769fb8e1173dff0d08bd68db6c", "status": "affected", "version": "4882ba78574e2d8c579658f65f6784b0d139d173", "versionType": "git"}, {"lessThan": "6.12.111", "status": "affected", "version": "6.12.101", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/afs/server.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.15"}, {"lessThan": "6.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "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-rc3", "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\nafs: Fix incorrect free in candidate cleanup in afs_lookup_server()\n\nFix afs_lookup_server() to not free an existing server's endpoint state\nwhen cleaning up a candidate server. The candidate record doesn't have an\nendpoint state yet at this point, so the free for that can just be removed."}], "id": "CVE-2026-97584", "lastModified": "2026-09-25T11:17:09.267", "metrics": {}, "published": "2026-09-25T11:17:09.267", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/044d596094af4b769fb8e1173dff0d08bd68db6c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/349e713039a1fd6659c27e7a66238bfa49ce37e9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/981d72663dee2fa6efaf202293e68d2b10a0d1d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e5bc0fa9959dc8f7eb1afab7c039594a16a1a65c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

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