{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-39971", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.149Z", "datePublished": "2025-10-15T07:55:54.270Z", "dateUpdated": "2026-08-05T12:06:40.599Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:06:40.599Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni40e: fix idx validation in config queues msg\n\nEnsure idx is within range of active/initialized TCs when iterating over\nvf->ch[idx] in i40e_vc_config_queues_msg()." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The malicious input arrives as a `VIRTCHNL_OP_CONFIG_VSI_QUEUES` message on the SR-IOV VF→PF admin-queue mailbox, a PCIe transport, not a network protocol. The attacker needs local control of an assigned VF (guest VM or VF-owning container), so this is local reachability rather than network or adjacent.\nAC:L - The attacker fully controls every input — `num_tc` and per-TC `count` via ENABLE_CHANNELS, then `num_queue_pairs` and the qpair array via CONFIG_VSI_QUEUES — so shrinking `num_tc` to leave stale `ch[]` entries and then walking `idx` into them is deterministic on the first attempt with no memory grooming or race. The only precondition, spoofchk disabled, is inherent to any ADq-enabled SR-IOV deployment and is a standard runtime configuration.\nPR:L - The attacker only needs to drive the VF's admin queue — kernel/root inside the assigned guest, or possession of the VFIO device — which is a low-privileged position relative to the host PF driver under attack. No privileges of any kind on the host are required.\nUI:N - The malicious VF sends the virtchnl message sequence entirely on its own initiative. No host administrator or other user action is needed at any stage.\nS:C - The attacking VF sits in a guest VM (or VF-assigned container) while the stale-index read and the resulting hardware queue-context programming occur in the host PF driver's security authority. The corrupted resources — HMC LAN Tx/Rx contexts and QTX_CTL bindings of VSIs belonging to the PF or to other VFs — are outside the attacker's scope, crossing the guest/host and inter-tenant SR-IOV boundary.\nC:H - Using a stale `ch[idx].vsi_id`, the VF resolves and reprograms the Rx queue context of a VSI it does not own, setting `rx_ctx.base` from its own `dma_ring_addr` so another VSI's received traffic is DMA'd into attacker-designated memory — interception of host and cross-guest traffic. On pre-5.2 kernels the same defect additionally reads past the end of `vf->ch[]` into adjacent `struct i40e_vf` state.\nI:H - `i40e_config_vsi_rx_queue()` performs no ownership check and `i40e_config_vsi_tx_queue()` validates only the VF-supplied `info->vsi_id`, so the stale ID lets the VF clear and rewrite the LAN HMC Tx/Rx contexts of a foreign VSI's queues and issue a `QTX_CTL` write rebinding that PF queue to itself. This is attacker-controlled modification of host- and peer-owned hardware state.\nA:H - Clearing and rewriting queue contexts belonging to the PF's main VSI or another guest's VSI stalls or wedges those queues, and out-of-range `pf_queue_id` values (`I40E_QUEUE_END_OF_LIST`) drive HMC operations that trigger adapter error paths, PF/VF reset storms and loss of host networking. The VF can repeat the sequence at will, and a downed host PF takes every guest on the adapter with it." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c" ], "versions": [ { "version": "c27eac48160de72dee33d42b5a33cc7b8a2eb1f5", "lessThan": "a6ff2af78343eceb0f77ab1a2fe802183bc21648", "status": "affected", "versionType": "git" }, { "version": "c27eac48160de72dee33d42b5a33cc7b8a2eb1f5", "lessThan": "f5f91d164af22e7147130ef8bebbdb28d8ecc6e2", "status": "affected", "versionType": "git" }, { "version": "c27eac48160de72dee33d42b5a33cc7b8a2eb1f5", "lessThan": "1fa0aadade34481c567cdf4a897c0d4e4d548bd1", "status": "affected", "versionType": "git" }, { "version": "c27eac48160de72dee33d42b5a33cc7b8a2eb1f5", "lessThan": "8b9c7719b0987b1c6c5fc910599f3618a558dbde", "status": "affected", "versionType": "git" }, { "version": "c27eac48160de72dee33d42b5a33cc7b8a2eb1f5", "lessThan": "2cc26dac0518d2fa9b67ec813ee60e183480f98a", "status": "affected", "versionType": "git" }, { "version": "c27eac48160de72dee33d42b5a33cc7b8a2eb1f5", "lessThan": "bfcc1dff429d4b99ba03e40ddacc68ea4be2b32b", "status": "affected", "versionType": "git" }, { "version": "c27eac48160de72dee33d42b5a33cc7b8a2eb1f5", "lessThan": "5c1f96123113e0bdc6d8dc2b0830184c93da9f65", "status": "affected", "versionType": "git" }, { "version": "c27eac48160de72dee33d42b5a33cc7b8a2eb1f5", "lessThan": "f1ad24c5abe1eaef69158bac1405a74b3c365115", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c" ], "versions": [ { "version": "4.17", "status": "affected" }, { "version": "0", "lessThan": "4.17", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.300", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.245", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.194", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.155", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.109", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.50", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16.10", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17", "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": "4.17", "versionEndExcluding": "5.4.300" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.10.245" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.15.194" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.1.155" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.6.109" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.12.50" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.16.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.17" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/a6ff2af78343eceb0f77ab1a2fe802183bc21648" }, { "url": "https://git.kernel.org/stable/c/f5f91d164af22e7147130ef8bebbdb28d8ecc6e2" }, { "url": "https://git.kernel.org/stable/c/1fa0aadade34481c567cdf4a897c0d4e4d548bd1" }, { "url": "https://git.kernel.org/stable/c/8b9c7719b0987b1c6c5fc910599f3618a558dbde" }, { "url": "https://git.kernel.org/stable/c/2cc26dac0518d2fa9b67ec813ee60e183480f98a" }, { "url": "https://git.kernel.org/stable/c/bfcc1dff429d4b99ba03e40ddacc68ea4be2b32b" }, { "url": "https://git.kernel.org/stable/c/5c1f96123113e0bdc6d8dc2b0830184c93da9f65" }, { "url": "https://git.kernel.org/stable/c/f1ad24c5abe1eaef69158bac1405a74b3c365115" } ], "title": "i40e: fix idx validation in config queues msg", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-06-16T15:52:18.829458Z", "id": "CVE-2025-39971", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-16T15:52:31.898Z" } } ] } }