159 lines
8.9 KiB
JSON
159 lines
8.9 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-38570",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-04-16T04:51:24.025Z",
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"datePublished": "2025-08-19T17:02:50.677Z",
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"dateUpdated": "2026-08-05T12:02:58.557Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:02:58.557Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\neth: fbnic: unlink NAPIs from queues on error to open\n\nCI hit a UaF in fbnic in the AF_XDP portion of the queues.py test.\nThe UaF is in the __sk_mark_napi_id_once() call in xsk_bind(),\nNAPI has been freed. Looks like the device failed to open earlier,\nand we lack clearing the NAPI pointer from the queue."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The dangling NAPI pointer is created by a local netdev administrative operation (link up) and dereferenced through local syscalls — `bind()` on an AF_XDP socket or a netdev-genl queue query. No remote peer data reaches this code path.\nAC:L - Once the failed open leaves the pointers dangling, the UAF is a persistent state rather than a race window, and `xsk_bind()` with `XDP_COPY` reaches `rxq->napi->napi_id` deterministically on the down device for every queue index, repeatable at will. The open failure itself is attacker-influenceable (`-ENOMEM` in `fbnic_tlv_msg_alloc()`/`request_irq()` under attacker-generated memory pressure, or an unready FW mailbox) and link-up can be retried indefinitely.\nPR:L - Both required capabilities are namespaced — `ns_capable(net->user_ns, CAP_NET_ADMIN)` for RTM_SETLINK link-up and `ns_capable(net->user_ns, CAP_NET_RAW)` for AF_XDP socket creation — so an unprivileged user in a user-namespace-owned netns with the NIC delegated (container/passthrough deployments) can perform the whole sequence without real root.\nUI:N - The attacker performs both the link-up that fails and the subsequent AF_XDP bind; no action by any other user or victim process is needed.\nS:U - The freed object and the corrupted pointers both live in kernel memory under the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is a use-after-free read of a freed `fbnic_napi_vector` slab object, and the attacker can spray the freed allocation before triggering the read; the value is then exfiltrated to userspace via `getsockopt(SO_INCOMING_NAPI_ID)`, giving a repeatable read primitive over reclaimed kernel heap.\nI:H - Stale `struct napi_struct *` pointers persist in the netdev's rx and tx queue structures after the backing allocation is freed; per UAF treatment this heap-reuse condition is exploitable for controlling reclaimed object contents and hijacking dependent state.\nA:H - Dereferencing the freed vector — potentially after the slab page has been returned to the page allocator — produces an oops or panic, and the condition can be re-triggered against every queue index on the affected interface."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/ethernet/meta/fbnic/fbnic_netdev.c"
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],
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"versions": [
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{
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"version": "557d02238e05eb66b9aba9a1f90f3a2131c6c887",
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"lessThan": "21d3f8441c7f317b93ba6a8029610c8b7e3773db",
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"status": "affected",
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"versionType": "git"
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},
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{
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"lessThan": "4b59f9deff3bdb52b223c85048f1d2924803b817",
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"status": "affected",
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{
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"lessThan": "4b31bcb025cb497da2b01f87173108ff32d350d2",
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"status": "affected",
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/ethernet/meta/fbnic/fbnic_netdev.c"
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],
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"versions": [
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{
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"version": "6.14",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.14",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.15.10",
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"lessThanOrEqual": "6.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.16.1",
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"lessThanOrEqual": "6.16.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.17",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.14",
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"versionEndExcluding": "6.15.10"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/21d3f8441c7f317b93ba6a8029610c8b7e3773db"
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},
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{
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"url": "https://git.kernel.org/stable/c/4b59f9deff3bdb52b223c85048f1d2924803b817"
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},
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{
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"url": "https://git.kernel.org/stable/c/4b31bcb025cb497da2b01f87173108ff32d350d2"
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}
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],
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"title": "eth: fbnic: unlink NAPIs from queues on error to open",
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