249 lines
13 KiB
JSON
249 lines
13 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-43042",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2026-05-01T14:12:55.978Z",
|
|
"datePublished": "2026-05-01T14:15:38.882Z",
|
|
"dateUpdated": "2026-10-30T12:24:50.878Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-10-30T12:24:50.878Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmpls: add seqcount to protect the platform_label{,s} pair\n\nThe RCU-protected codepaths (mpls_forward, mpls_dump_routes) can have\nan inconsistent view of platform_labels vs platform_label in case of a\nconcurrent resize (resize_platform_label_table, under\nplatform_mutex). This can lead to OOB accesses.\n\nThis patch adds a seqcount, so that we get a consistent snapshot.\n\nNote that mpls_label_ok is also susceptible to this, so the check\nagainst RTA_DST in rtm_to_route_config, done outside platform_mutex,\nis not sufficient. This value gets passed to mpls_label_ok once more\nin both mpls_route_add and mpls_route_del, so there is no issue, but\nthat additional check must not be removed."
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"cvssV3_1": {
|
|
"version": "3.1",
|
|
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
|
|
"baseScore": 7.1,
|
|
"baseSeverity": "HIGH"
|
|
},
|
|
"scenarios": [
|
|
{
|
|
"lang": "en",
|
|
"value": "AV:L - The self-contained exploit path is local: the attacker races writes to /proc/sys/net/mpls/platform_labels with rtnetlink RTM_GETROUTE dumps in the same network namespace. Remote MPLS packets can reach one reader path, but a remote-only attacker cannot perform the required table resize.\nAC:L - The vulnerable condition is a race, but a local attacker can control both sides by repeatedly resizing platform_labels and issuing concurrent route dumps or packet processing. No external timing or victim state is required beyond retrying the race.\nPR:L - Writing the MPLS platform_labels sysctl requires CAP_NET_ADMIN over the target network namespace. That capability is reachable by an unprivileged user through a user namespace plus network namespace, so this is low privilege rather than high privilege.\nUI:N - No victim user action is required. The attacker can trigger the resize and reader paths directly.\nS:U - The bug is within the kernel networking/MPLS subsystem and impacts the same kernel security authority. It is not a VM escape or cross-authority boundary bypass.\nC:H - The inconsistent platform_labels/platform_label snapshot can cause out-of-bounds reads of the route pointer table and dereference attacker-influenced or adjacent kernel memory as mpls_route data. Through the route dump path this can disclose kernel memory, so confidentiality is high.\nI:N - The bug is an out-of-bounds read/dereference of the route table pointer array, not an out-of-bounds write or direct memory corruption primitive. The investigated paths do not provide a defensible arbitrary kernel data modification primitive.\nA:H - The race can make readers index a NULL, stale, or too-small platform_label array and dereference invalid pointers. This can reliably lead to kernel oops/panic or other high availability impact."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"include/net/netns/mpls.h",
|
|
"net/mpls/af_mpls.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "7720c01f3f590116882e251f13c7e1d5602f8643",
|
|
"lessThan": "6b9184ebc936f791631e51e783ab30320b3770e4",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "7720c01f3f590116882e251f13c7e1d5602f8643",
|
|
"lessThan": "0d377825548fe598595b5a5fa4a309fb593d8fb4",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "7720c01f3f590116882e251f13c7e1d5602f8643",
|
|
"lessThan": "8adc5b6fc876928d8c95555d30b66fa50b07421e",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "7720c01f3f590116882e251f13c7e1d5602f8643",
|
|
"lessThan": "5bb3caf0bbfb56f1a00d2af072ac3d8395a3b9ef",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "7720c01f3f590116882e251f13c7e1d5602f8643",
|
|
"lessThan": "629ec78ef8608d955ce217880cdc3e1873af3a15",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "affected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"include/net/netns/mpls.h",
|
|
"net/mpls/af_mpls.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "4.1",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "4.1",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.1.191",
|
|
"lessThanOrEqual": "6.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.6.160",
|
|
"lessThanOrEqual": "6.6.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.12.114",
|
|
"lessThanOrEqual": "6.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.19.12",
|
|
"lessThanOrEqual": "6.19.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.0",
|
|
"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": "4.1",
|
|
"versionEndExcluding": "6.1.191"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.1",
|
|
"versionEndExcluding": "6.6.160"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.1",
|
|
"versionEndExcluding": "6.12.114"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.1",
|
|
"versionEndExcluding": "6.19.12"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "4.1",
|
|
"versionEndExcluding": "7.0"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/6b9184ebc936f791631e51e783ab30320b3770e4"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/0d377825548fe598595b5a5fa4a309fb593d8fb4"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/8adc5b6fc876928d8c95555d30b66fa50b07421e"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/5bb3caf0bbfb56f1a00d2af072ac3d8395a3b9ef"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/629ec78ef8608d955ce217880cdc3e1873af3a15"
|
|
}
|
|
],
|
|
"title": "mpls: add seqcount to protect the platform_label{,s} pair",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"id": "CVE-2026-43042",
|
|
"role": "CISA Coordinator",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "partial"
|
|
}
|
|
],
|
|
"version": "2.0.3",
|
|
"timestamp": "2026-10-16T15:13:53.309258Z"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"type": "CWE",
|
|
"cweId": "CWE-362",
|
|
"description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-10-19T19:06:10.994Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |