266 lines
14 KiB
JSON
266 lines
14 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-2026-74527",
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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": "2026-08-15T05:44:03.912Z",
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"datePublished": "2026-08-15T12:27:43.568Z",
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"dateUpdated": "2026-10-30T12:30:06.747Z"
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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": "2026-10-30T12:30:06.747Z"
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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: Block VFs from clobbering special CGX PKIND state\n\nPF and VF NIX LFs that share a CGX LMAC reuse the same hardware PKIND\nprogramming. When HiGig2 or EDSA parsing is enabled, a VF NIX LF alloc must\nnot reset the LMAC RX PKIND or default TX parse config over the PF setup.\n\nAdd cgx_get_pkind() and rvu_cgx_is_pkind_config_permitted() so VFs skip\ncgx_set_pkind(), rvu_npc_set_pkind(), and NIX_AF_LFX_TX_PARSE_CFG updates\nwhen the LMAC is using NPC_RX_HIGIG_PKIND or NPC_RX_EDSA_PKIND."
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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:H/I:H/A:H",
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"baseScore": 8.8,
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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 - Exploitation requires a malicious SR-IOV VF tenant to send NIX_LF_ALLOC mailbox messages over PCI BAR registers during netdev bring-up; the vulnerable AF code is not reachable from remote network packets.\nAC:L - In the target OcteonTX2 DSA/HiGig multi-tenant deployment, a VF reliably triggers the bug by opening its netdev; no races or attacker-uncontrollable memory layout are needed once HiGig/EDSA parsing is enabled on the shared LMAC.\nPR:L - The attacker is a cloud/NFV tenant with an assigned OcteonTX2 VF; triggering NIX LF allocation during interface up requires only guest-level netdev privileges (e.g., CAP_NET_ADMIN in the VM), not host root or init-namespace admin rights.\nUI:N - No victim interaction is required; the clobber occurs automatically when the attacker brings up or reinitializes their VF network interface through the standard driver probe/open path.\nS:C - A VF guest corrupts host-managed shared CGX LMAC hardware PKIND and NPC parse configuration, impacting the PF and other functions on that port beyond the VF's own security authority—crossing the VM/tenant isolation boundary.\nC:H - Resetting HiGig/EDSA RX PKIND misconfigures NPC packet parsing for the entire shared LMAC, potentially misdelivering or exposing fabric/switch-tagged traffic intended for the PF or other tenants to the attacker's VF.\nI:H - The VF forcibly overwrites shared LMAC RX PKIND via cgx_set_pkind() and programs default TX parse config, corrupting host-controlled switching-header parsing that governs how transmitted and received fabric traffic is processed on the port.\nA:H - Clobbering special HiGig/EDSA PKIND state breaks correct packet parsing for all PF/VF traffic on the shared LMAC, causing sustained loss of connectivity and denial of network service to the host and co-located tenants."
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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/cgx.c",
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"drivers/net/ethernet/marvell/octeontx2/af/cgx.h",
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"drivers/net/ethernet/marvell/octeontx2/af/rvu.h",
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"drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c",
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"drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c",
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"drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c"
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],
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"versions": [
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{
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"version": "94d942c5fb970ac2166216838b278613decfa9a0",
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"lessThan": "f24f7ce6fb2d1ae080a05371afddba30a3e0b919",
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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": "94d942c5fb970ac2166216838b278613decfa9a0",
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"lessThan": "1106b26e86ac1e7e4d1f634bcd532c5d44e60620",
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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": "94d942c5fb970ac2166216838b278613decfa9a0",
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"lessThan": "7e888d7dd11519330ba6c6a28391d55891463a6a",
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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": "94d942c5fb970ac2166216838b278613decfa9a0",
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"lessThan": "a76243488740a07c81c9adf431685bb7f7c31d8c",
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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": "94d942c5fb970ac2166216838b278613decfa9a0",
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"lessThan": "d3c6b0f48f126a36955b3fb4154a59d0b3621d97",
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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": "94d942c5fb970ac2166216838b278613decfa9a0",
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"lessThan": "3bd438a58e910db5dc369aa25dfed1fc95f1b596",
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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/cgx.c",
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"drivers/net/ethernet/marvell/octeontx2/af/cgx.h",
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"drivers/net/ethernet/marvell/octeontx2/af/rvu.h",
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"drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c",
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"drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c",
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"drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c"
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],
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"versions": [
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{
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"version": "4.20",
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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": "4.20",
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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": "6.1.191",
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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": "6.6.160",
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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": "6.12.114",
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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": "6.18.57",
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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": "7.1.8",
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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": "4.20",
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"versionEndExcluding": "6.1.191"
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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": "4.20",
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"versionEndExcluding": "6.6.160"
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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": "4.20",
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"versionEndExcluding": "6.12.114"
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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": "4.20",
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"versionEndExcluding": "6.18.57"
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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": "4.20",
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"versionEndExcluding": "7.1.8"
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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": "4.20",
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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/f24f7ce6fb2d1ae080a05371afddba30a3e0b919"
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},
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{
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"url": "https://git.kernel.org/stable/c/1106b26e86ac1e7e4d1f634bcd532c5d44e60620"
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},
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{
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"url": "https://git.kernel.org/stable/c/7e888d7dd11519330ba6c6a28391d55891463a6a"
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},
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{
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"url": "https://git.kernel.org/stable/c/a76243488740a07c81c9adf431685bb7f7c31d8c"
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},
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{
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"url": "https://git.kernel.org/stable/c/d3c6b0f48f126a36955b3fb4154a59d0b3621d97"
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},
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{
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"url": "https://git.kernel.org/stable/c/3bd438a58e910db5dc369aa25dfed1fc95f1b596"
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}
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],
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"title": "octeontx2-af: Block VFs from clobbering special CGX PKIND 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-2026-74527",
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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": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T18:59:11.086821Z"
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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": "2026-10-16T19:05:53.016Z"
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}
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}
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]
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}
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} |