256 lines
13 KiB
JSON
256 lines
13 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-2026-72312",
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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": "2026-08-09T03:40:39.918Z",
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"datePublished": "2026-08-15T05:55:27.817Z",
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"dateUpdated": "2026-10-16T18:55:16.851Z"
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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": "2026-08-17T05:42:39.727Z"
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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\nocteontx2-af: fix VF bringup affecting PF promiscuous state\n\nMbox handling of nix_set_rx_mode for a VF with promiscuous and\nall_multi flags set to false causes deletion of the PF's promiscuous\nand allmulti MCAM rules. This occurs because the APIs that\nenable/disable these rules operate only on the PF, even when the\nmbox request is made via a VF interface.\n\nGuard both rvu_npc_enable_allmulti_entry() and\nrvu_npc_enable_promisc_entry() disable paths with an is_vf() check so\nthat a VF bringing up or tearing down its interface cannot inadvertently\nclear the PF's MCAM rules."
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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:C/C:L/I:L/A:H",
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"baseScore": 7.9,
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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 - Exploitation requires local control of an SR-IOV VF netdev on Marvell OcteonTX2/CN10K hardware; the bug is triggered via the VF driver's mailbox to the AF (rvu_mbox_handler_nix_set_rx_mode), not by remote packet delivery.\nAC:L - An attacker with VF netdev access can reliably trigger the flaw by bringing the interface up/down or changing rx_mode (e.g., ip link set up), which sends NIX_SET_RX_MODE with promisc/allmulti cleared; no race or victim timing is required.\nPR:L - Only guest/namespace CAP_NET_ADMIN (or equivalent root in an SR-IOV-assigned VM) is needed to manage the VF netdev; host init-namespace root is not required and user namespaces cannot reach this hardware path without the VF device.\nUI:N - No victim interaction is needed; the attacker initiates VF interface bringup/teardown or rx_mode updates that invoke otx2_do_set_rx_mode/otx2vf_do_set_rx_mode and the AF mbox handler.\nS:C - A VF tenant can alter PF-side NPC MCAM promiscuous/allmulti rules (rvu_npc_enable_promisc_entry/rvu_npc_enable_allmulti_entry mask pcifunc to the PF), crossing the SR-IOV isolation boundary between guest/tenant and host/provider packet filtering.\nC:L - Disabling the PF promiscuous/allmulti MCAM entries can blind host IDS/tcpdump and other monitoring that depends on promiscuous reception, reducing visibility into network traffic on the affected PF (limited confidentiality impact, not arbitrary kernel memory read).\nI:L - The VF causes unauthorized modification of host-side hardware packet-filter state by disabling PF MCAM promisc/allmulti rules; this is limited integrity impact on network policy rather than arbitrary memory or code execution.\nA:H - Clearing PF promiscuous and allmulti MCAM rules can break or degrade PF multicast delivery and promiscuous capture/monitoring on internet-facing cloud/edge servers using these NICs, and can be repeated by cycling the VF 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/marvell/octeontx2/af/rvu_nix.c"
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],
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"versions": [
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{
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"version": "967db3529ecac305d230aa4e60abddf6ab63543a",
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"lessThan": "daa2451640a3e0727fd598f5c2ccb8bb4d5a8b9c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "967db3529ecac305d230aa4e60abddf6ab63543a",
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"lessThan": "212c59e5e416859579272288fd325148fc316109",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "967db3529ecac305d230aa4e60abddf6ab63543a",
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"lessThan": "53e17d9ed779ad25870abb9c31bc294c71a2278c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "967db3529ecac305d230aa4e60abddf6ab63543a",
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"lessThan": "3de77d2f34c2bc2acaedabc2c5e0a561b85c283a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "967db3529ecac305d230aa4e60abddf6ab63543a",
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"lessThan": "3cf83432e0561aef6d7ec2664909d12d0ff0ffc1",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "967db3529ecac305d230aa4e60abddf6ab63543a",
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"lessThan": "fabb881df322da25442f98d23f5fa371e3c78ec4",
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"status": "affected",
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"versionType": "git"
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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/marvell/octeontx2/af/rvu_nix.c"
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],
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"versions": [
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{
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"version": "5.14",
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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": "5.14",
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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": "6.1.178",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.145",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.97",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.40",
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"lessThanOrEqual": "6.18.*",
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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": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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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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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.1.178"
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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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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.6.145"
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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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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.12.97"
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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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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.18.40"
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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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"versionStartIncluding": "5.14",
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"versionEndExcluding": "7.1.5"
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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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"versionStartIncluding": "5.14",
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"versionEndExcluding": "7.2"
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}
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]
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}
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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/daa2451640a3e0727fd598f5c2ccb8bb4d5a8b9c"
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},
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{
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"url": "https://git.kernel.org/stable/c/212c59e5e416859579272288fd325148fc316109"
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},
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{
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"url": "https://git.kernel.org/stable/c/53e17d9ed779ad25870abb9c31bc294c71a2278c"
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},
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{
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"url": "https://git.kernel.org/stable/c/3de77d2f34c2bc2acaedabc2c5e0a561b85c283a"
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},
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{
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"url": "https://git.kernel.org/stable/c/3cf83432e0561aef6d7ec2664909d12d0ff0ffc1"
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},
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{
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"url": "https://git.kernel.org/stable/c/fabb881df322da25442f98d23f5fa371e3c78ec4"
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}
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],
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"title": "octeontx2-af: fix VF bringup affecting PF promiscuous state",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-72312",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T18:46:27.762853Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-16T18:55:16.851Z"
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}
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}
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]
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}
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} |