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vuln-cve/data/2025/71xxx/CVE-2025-71097.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-71097",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-01-13T15:30:19.650Z",
"datePublished": "2026-01-13T15:34:56.814Z",
"dateUpdated": "2026-11-10T12:38:58.596Z"
},
"containers": {
"cna": {
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"shortName": "Linux",
"dateUpdated": "2026-05-11T21:54:41.289Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: Fix reference count leak when using error routes with nexthop objects\n\nWhen a nexthop object is deleted, it is marked as dead and then\nfib_table_flush() is called to flush all the routes that are using the\ndead nexthop.\n\nThe current logic in fib_table_flush() is to only flush error routes\n(e.g., blackhole) when it is called as part of network namespace\ndismantle (i.e., with flush_all=true). Therefore, error routes are not\nflushed when their nexthop object is deleted:\n\n # ip link add name dummy1 up type dummy\n # ip nexthop add id 1 dev dummy1\n # ip route add 198.51.100.1/32 nhid 1\n # ip route add blackhole 198.51.100.2/32 nhid 1\n # ip nexthop del id 1\n # ip route show\n blackhole 198.51.100.2 nhid 1 dev dummy1\n\nAs such, they keep holding a reference on the nexthop object which in\nturn holds a reference on the nexthop device, resulting in a reference\ncount leak:\n\n # ip link del dev dummy1\n [ 70.516258] unregister_netdevice: waiting for dummy1 to become free. Usage count = 2\n\nFix by flushing error routes when their nexthop is marked as dead.\n\nIPv6 does not suffer from this problem."
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/ipv4/fib_trie.c"
],
"versions": [
{
"version": "493ced1ac47c48bb86d9d4e8e87df8592be85a0e",
"lessThan": "5de7ad7e18356e39e8fbf7edd185a5faaf4f385a",
"status": "affected",
"versionType": "git"
},
{
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"lessThan": "e3fc381320d04e4a74311e576a86cac49a16fc43",
"status": "affected",
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"status": "affected",
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]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/ipv4/fib_trie.c"
],
"versions": [
{
"version": "5.3",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.3",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.248",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.198",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.160",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.120",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.64",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.4",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.19",
"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": "5.3",
"versionEndExcluding": "5.10.248"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.3",
"versionEndExcluding": "5.15.198"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.3",
"versionEndExcluding": "6.1.160"
},
{
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},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.3",
"versionEndExcluding": "6.18.4"
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{
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"references": [
{
"url": "https://git.kernel.org/stable/c/5de7ad7e18356e39e8fbf7edd185a5faaf4f385a"
},
{
"url": "https://git.kernel.org/stable/c/33ff5c207c873215e54e6176624ed57423cb7dea"
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{
"url": "https://git.kernel.org/stable/c/30386e090c49e803c0616a7147e43409c32a2b0e"
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{
"url": "https://git.kernel.org/stable/c/5979338c83012110ccd45cae6517591770bfe536"
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{
"url": "https://git.kernel.org/stable/c/ee4183501ea556dca31f5ffd8690aa9fd25b609f"
},
{
"url": "https://git.kernel.org/stable/c/e3fc381320d04e4a74311e576a86cac49a16fc43"
},
{
"url": "https://git.kernel.org/stable/c/ac782f4e3bfcde145b8a7f8af31d9422d94d172a"
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"title": "ipv4: Fix reference count leak when using error routes with nexthop objects",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2025-71097",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-06-10T20:40:27.713433Z"
}
}
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"type": "CWE",
"cweId": "CWE-401",
"description": "CWE-401 Missing Release of Memory after Effective Lifetime"
}
]
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-10-19T18:15:12.771Z"
}
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{
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}
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