246 lines
13 KiB
JSON
246 lines
13 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-68116",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2026-07-30T09:28:09.369Z",
|
|
"datePublished": "2026-08-10T11:58:34.612Z",
|
|
"dateUpdated": "2026-10-19T20:58:51.286Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-17T04:59:06.287Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: mdb: Fix source list corruption on a failed replace\n\nWhen replacing the source list of an MDB remote entry, all existing\nsources are first marked for deletion and vxlan_mdb_remote_srcs_add()\nis then called to add the new source list. Sources present in the new\nlist have their deletion mark cleared, and any sources left marked\nafterwards are removed.\n\nIf vxlan_mdb_remote_srcs_add() fails partway through, its error path\ndeletes all entries on the remote's source list. That rollback is only\ncorrect for its other caller, vxlan_mdb_remote_add(), where the remote\nwas just allocated and the list contains solely entries added during\nthe call. On the replace path the list also holds pre-existing sources,\nso a failed replace tears them down together with their (S, G)\nforwarding entries instead of leaving the entry unchanged.\n\nThis is reachable from an existing (*, G) remote. An EXCLUDE filter\nthat loses sources starts forwarding traffic that should be blocked,\nwhile an INCLUDE filter that loses sources drops traffic that should be\nforwarded.\n\nMark entries created during the current pass with a new\nVXLAN_SGRP_F_NEW flag. On failure, delete only those entries and clear\nthe deletion mark on the pre-existing ones, so a failed replace leaves\nthe source list untouched. Retain the flag until the whole operation\nsucceeds and then clear it. Also stop vxlan_mdb_remote_src_add() from\ndeleting a pre-existing entry it only looked up when adding that\nentry's forwarding entry fails."
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"cvssV3_1": {
|
|
"version": "3.1",
|
|
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H",
|
|
"baseScore": 7.9,
|
|
"baseSeverity": "HIGH"
|
|
},
|
|
"scenarios": [
|
|
{
|
|
"lang": "en",
|
|
"value": "AV:L - The bug is only reachable via the RTM_NEWMDB rtnetlink control path (ndo_mdb_add); multicast data-plane packets use vxlan_mdb_xmit and never hit the replace/rollback logic.\nAC:L - An attacker with CAP_NET_ADMIN can create an existing (*,G) remote, issue NLM_F_REPLACE with a new source list, and reliably force vxlan_mdb_remote_srcs_add() to fail mid-loop (e.g., ENOMEM via memory pressure) to trigger the bad rollback.\nPR:L - rtnetlink requires CAP_NET_ADMIN for RTM_NEWMDB; this capability is obtainable by unprivileged users inside user/network namespaces, not solely by init-namespace root.\nUI:N - Exploitation requires only crafted rtnetlink MDB messages from a process with network-admin capability; no victim user action is needed.\nS:C - A corrupted EXCLUDE source list forwards multicast that policy intended to block to VXLAN remote peers, crossing intended overlay segmentation boundaries beyond the misconfigured netdev's local authority.\nC:L - EXCLUDE filter corruption removes per-source block rules, causing multicast payloads from previously blocked sources to be encapsulated and delivered to unauthorized VXLAN remotes.\nI:L - Failed replace corrupts MDB source lists and (S,G) forwarding state, causing unauthorized multicast delivery (EXCLUDE) or dropping traffic that should be forwarded (INCLUDE).\nA:H - INCLUDE filter corruption can wipe all source entries on a (*,G) remote, causing vxlan_mdb_xmit to permanently drop all multicast for that group until MDB state is manually repaired."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"drivers/net/vxlan/vxlan_mdb.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "a3a48de5eade770e911d35291217bdd69ce04ef1",
|
|
"lessThan": "5bc8fc1d2ff802eec839e03adef5df597421898d",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "a3a48de5eade770e911d35291217bdd69ce04ef1",
|
|
"lessThan": "2c54dff57606590fa4abec46bab6bea3133f1539",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "a3a48de5eade770e911d35291217bdd69ce04ef1",
|
|
"lessThan": "79370b573e92e8f190eb5f9a511fa5398340d8b2",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "a3a48de5eade770e911d35291217bdd69ce04ef1",
|
|
"lessThan": "54a3c27b357dfb34f327f89bfadeb998bef8051e",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "a3a48de5eade770e911d35291217bdd69ce04ef1",
|
|
"lessThan": "dcd9b465965422b9654f6026e8a2fa8984f74c3c",
|
|
"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/vxlan/vxlan_mdb.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "6.4",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "6.4",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.6.148",
|
|
"lessThanOrEqual": "6.6.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.12.101",
|
|
"lessThanOrEqual": "6.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.18.42",
|
|
"lessThanOrEqual": "6.18.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.1.6",
|
|
"lessThanOrEqual": "7.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.2",
|
|
"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": "6.4",
|
|
"versionEndExcluding": "6.6.148"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.4",
|
|
"versionEndExcluding": "6.12.101"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.4",
|
|
"versionEndExcluding": "6.18.42"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.4",
|
|
"versionEndExcluding": "7.1.6"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.4",
|
|
"versionEndExcluding": "7.2"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/5bc8fc1d2ff802eec839e03adef5df597421898d"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/2c54dff57606590fa4abec46bab6bea3133f1539"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/79370b573e92e8f190eb5f9a511fa5398340d8b2"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/54a3c27b357dfb34f327f89bfadeb998bef8051e"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/dcd9b465965422b9654f6026e8a2fa8984f74c3c"
|
|
}
|
|
],
|
|
"title": "vxlan: mdb: Fix source list corruption on a failed replace",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"id": "CVE-2026-68116",
|
|
"role": "CISA Coordinator",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "partial"
|
|
}
|
|
],
|
|
"version": "2.0.3",
|
|
"timestamp": "2026-10-16T15:44:03.646035Z"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"type": "CWE",
|
|
"description": "CWE-noinfo Not enough information"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-10-19T20:58:51.286Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |