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vuln-cve/data/2026/23xxx/CVE-2026-23304.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-23304",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-01-13T15:37:45.993Z",
"datePublished": "2026-03-25T10:26:59.015Z",
"dateUpdated": "2026-11-10T12:42:28.665Z"
},
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"shortName": "Linux",
"dateUpdated": "2026-05-11T22:04:17.686Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix NULL pointer deref in ip6_rt_get_dev_rcu()\n\nl3mdev_master_dev_rcu() can return NULL when the slave device is being\nun-slaved from a VRF. All other callers deal with this, but we lost\nthe fallback to loopback in ip6_rt_pcpu_alloc() -> ip6_rt_get_dev_rcu()\nwith commit 4832c30d5458 (\"net: ipv6: put host and anycast routes on\ndevice with address\").\n\n KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f]\n RIP: 0010:ip6_rt_pcpu_alloc (net/ipv6/route.c:1418)\n Call Trace:\n ip6_pol_route (net/ipv6/route.c:2318)\n fib6_rule_lookup (net/ipv6/fib6_rules.c:115)\n ip6_route_output_flags (net/ipv6/route.c:2607)\n vrf_process_v6_outbound (drivers/net/vrf.c:437)\n\nI was tempted to rework the un-slaving code to clear the flag first\nand insert synchronize_rcu() before we remove the upper. But looks like\nthe explicit fallback to loopback_dev is an established pattern.\nAnd I guess avoiding the synchronize_rcu() is nice, too."
}
],
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"net/ipv6/route.c"
],
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"defaultStatus": "affected",
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],
"versions": [
{
"version": "4.14",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.14",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.253",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.203",
"lessThanOrEqual": "5.15.*",
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{
"version": "6.1.167",
"lessThanOrEqual": "6.1.*",
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{
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{
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"status": "unaffected",
"versionType": "original_commit_for_fix"
}
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}
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"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.14",
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.14",
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"references": [
{
"url": "https://git.kernel.org/stable/c/d542e2ac7f9e288d49735be0775611547ca4e0ee"
},
{
"url": "https://git.kernel.org/stable/c/a73fe9f4ae84a239d5b2686f47a58c158aee2eb4"
},
{
"url": "https://git.kernel.org/stable/c/4a48fe59f29f673a3d042d679f26629a9c3e29d4"
},
{
"url": "https://git.kernel.org/stable/c/581800298313c9fd75e94985e6d37d21b7e35d34"
},
{
"url": "https://git.kernel.org/stable/c/3310fc11fc47387d1dd4759b0bc961643ea11c7f"
},
{
"url": "https://git.kernel.org/stable/c/0b5a7826020706057cc5a9d9009e667027f221ee"
},
{
"url": "https://git.kernel.org/stable/c/ae88c8256547b63980770a9ea7be73a15900d27e"
},
{
"url": "https://git.kernel.org/stable/c/2ffb4f5c2ccb2fa1c049dd11899aee7967deef5a"
}
],
"title": "ipv6: fix NULL pointer deref in ip6_rt_get_dev_rcu()",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"x_adpType": "supplier",
"providerMetadata": {
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"shortName": "siemens-SADP",
"dateUpdated": "2026-11-10T12:42:28.665Z"
},
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"vendor": "Siemens",
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"content": {
"id": "CVE-2026-23304",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
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}
],
"version": "2.0.3",
"timestamp": "2026-11-05T21:26:19.702592Z"
}
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}
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"title": "CISA ADP Vulnrichment",
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}
}
]
}
}
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