{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-39972", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.149Z", "datePublished": "2025-10-15T07:55:54.929Z", "dateUpdated": "2026-08-05T12:06:41.675Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:06:41.675Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni40e: fix idx validation in i40e_validate_queue_map\n\nEnsure idx is within range of active/initialized TCs when iterating over\nvf->ch[idx] in i40e_validate_queue_map()." } ], "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 vulnerable code is the host PF driver's virtchnl mailbox handler, reached by a VF writing a `VIRTCHNL_OP_CONFIG_IRQ_MAP` message over PCIe, not by any network protocol. This is the standard local/guest-to-host vector used for SR-IOV VF-to-PF interface bugs.\nAC:L - The attacker fully controls both preconditions from inside the VF — it sends `VIRTCHNL_OP_ENABLE_CHANNELS` with `num_tc < 4` and then a crafted `CONFIG_IRQ_MAP` with high queue-map bits set; the sequence is deterministic with no race or memory-layout dependency. The `spoofchk off` requirement is inherent to every deployment where ADq is used at all, i.e. exactly the deployments where the code is reachable.\nPR:L - The attacker needs only control of a VF that has been legitimately assigned to them — root inside their own guest VM or container, which is the normal granted privilege level of an SR-IOV tenant. No privilege on the host or in the PF's security authority is required, and the PF handler applies no capability or \"trusted VF\" check to this opcode.\nUI:N - The malicious VF driver sends the virtchnl messages entirely on its own initiative. No action by the host administrator or any other tenant is needed once a VF is assigned.\nS:C - The attacker is confined to a VF/guest security authority, but the bypassed validation causes the host PF driver to program hardware queue-interrupt registers (`I40E_QINT_RQCTL`/`I40E_QINT_TQCTL`) for queues outside the VF's allocation — resources owned by the PF (host) and by other VFs (other tenants). Impact therefore lands beyond the vulnerable component's security authority, as in a guest-to-host/cross-tenant escape.\nC:H - `i40e_vc_isvalid_queue_id()` is invoked with a stale/zero VSI id and performs no ownership check, letting a VF get its queue map validated against a VSI belonging to the PF or another VF and then attach foreign queues to its own MSI-X vector, exposing another tenant's data-path activity. Cross-tenant exposure of resources the VF has no right to observe warrants High.\nI:H - When the gate wrongly passes, `i40e_config_irq_link_list()` writes MMIO interrupt-control registers at PF-relative queue indices derived from unvalidated VF input, modifying hardware state owned by the PF and by other VFs. Unauthorized modification of another security authority's device configuration is a High integrity impact.\nA:H - Misprogramming `QINT_RQCTL`/`QINT_TQCTL` for queues belonging to the PF or other VFs breaks their Rx/Tx interrupt delivery, stalling the host's and co-tenant VMs' network data paths; queue contexts can also be pointed at `I40E_QUEUE_END_OF_LIST`, wedging the link list. A single unprivileged VF can repeat this at will, denying service to the whole port." } ] } ], "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": "b6cb93a7ff208f324c7ec581d72995f80e115e0e", "status": "affected", "versionType": "git" }, { "version": "c27eac48160de72dee33d42b5a33cc7b8a2eb1f5", "lessThan": "6f15a7b34fae75e745bdc2ec05e06ddfd0dd2f3c", "status": "affected", "versionType": "git" }, { "version": "c27eac48160de72dee33d42b5a33cc7b8a2eb1f5", "lessThan": "34dfac0c904829967d500c51f216916ce1452957", "status": "affected", "versionType": "git" }, { "version": "c27eac48160de72dee33d42b5a33cc7b8a2eb1f5", "lessThan": "4d5e804a9e19b639b18fd13664dbad3c03c79e61", "status": "affected", "versionType": "git" }, { "version": "c27eac48160de72dee33d42b5a33cc7b8a2eb1f5", "lessThan": "50a1e2f50f6c22b93b94eb8d168a1be3c05bf5cd", "status": "affected", "versionType": "git" }, { "version": "c27eac48160de72dee33d42b5a33cc7b8a2eb1f5", "lessThan": "cc4191e8ef40d2249c1b9a8617d22ec8a976b574", "status": "affected", "versionType": "git" }, { "version": "c27eac48160de72dee33d42b5a33cc7b8a2eb1f5", "lessThan": "d4e3eaaa3cb3af77836d806c89cd6ebf533a7320", "status": "affected", "versionType": "git" }, { "version": "c27eac48160de72dee33d42b5a33cc7b8a2eb1f5", "lessThan": "aa68d3c3ac8d1dcec40d52ae27e39f6d32207009", "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/b6cb93a7ff208f324c7ec581d72995f80e115e0e" }, { "url": "https://git.kernel.org/stable/c/6f15a7b34fae75e745bdc2ec05e06ddfd0dd2f3c" }, { "url": "https://git.kernel.org/stable/c/34dfac0c904829967d500c51f216916ce1452957" }, { "url": "https://git.kernel.org/stable/c/4d5e804a9e19b639b18fd13664dbad3c03c79e61" }, { "url": "https://git.kernel.org/stable/c/50a1e2f50f6c22b93b94eb8d168a1be3c05bf5cd" }, { "url": "https://git.kernel.org/stable/c/cc4191e8ef40d2249c1b9a8617d22ec8a976b574" }, { "url": "https://git.kernel.org/stable/c/d4e3eaaa3cb3af77836d806c89cd6ebf533a7320" }, { "url": "https://git.kernel.org/stable/c/aa68d3c3ac8d1dcec40d52ae27e39f6d32207009" } ], "title": "i40e: fix idx validation in i40e_validate_queue_map", "x_generator": { "engine": "bippy-1.2.0" } } } }