HighFix available
ndisc: use RCU protection in ndisc_alloc_skb()
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: ndisc: use RCU protection in ndisc_alloc_skb() ndisc_alloc_skb() can be called without RTNL or RCU being held. Add RCU protection to avoid possible UAF.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.235, 5.15.179, 5.4.291, 6.1.129, 6.12.16, 6.13.4, 6.6.79
- CVEs
- CVE-2025-21764
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 02:04 UTC · Revision 1
Source evidence
ndisc: use RCU protection in ndisc_alloc_skb()
core-osv · Original sourcePublished 27 Feb 2025, 02:18 UTC
In the Linux kernel, the following vulnerability has been resolved: ndisc: use RCU protection in ndisc_alloc_skb() ndisc_alloc_skb() can be called without RTNL or RCU being held. Add RCU protection to avoid possible UAF.
osv:CVE-2025-21764
Kernel
Fixed versions: 5.4.291, 5.10.235, 5.15.179, 6.1.129, 6.6.79, 6.12.16, 6.13.4
Complete source record
{
"id": "8a68758072f3a733720a3a9f59071beb8adc71db7149661fd54b93ea69f32659",
"url": "https://osv.dev/vulnerability/CVE-2025-21764",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ndisc: use RCU protection in ndisc_alloc_skb()",
"summary": "In the Linux kernel, the following vulnerability has been resolved: ndisc: use RCU protection in ndisc_alloc_skb() ndisc_alloc_skb() can be called without RTNL or RCU being held. Add RCU protection to avoid possible UAF.",
"evidence": "osv:CVE-2025-21764",
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{
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{
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"package": {
"name": "Kernel",
"ecosystem": "Linux"
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"database_specific": {
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],
"modified": "2026-10-28T02:30:41.755492292Z",
"provider": "osv",
"references": [
"https://cert-portal.siemens.com/productcert/html/ssa-019113.html",
"https://cert-portal.siemens.com/productcert/html/ssa-265688.html",
"https://cert-portal.siemens.com/productcert/html/ssa-457936.html",
"https://cert-portal.siemens.com/productcert/html/ssa-784472.html",
"https://git.kernel.org/stable/c/3c2d705f5adf5d860aaef90cb4211c0fde2ba66d",
"https://git.kernel.org/stable/c/628e6d18930bbd21f2d4562228afe27694f66da9",
"https://git.kernel.org/stable/c/96fc896d0e5b37c12808df797397fb16f3080879",
"https://git.kernel.org/stable/c/9e0ec817eb41a55327a46cd3ce331a9868d60304",
"https://git.kernel.org/stable/c/b870256dd2a5648d5ed2f22316b3ac29a7e5ed63",
"https://git.kernel.org/stable/c/bbec88e4108e8d6fb468d3817fa652140a44ff28",
"https://git.kernel.org/stable/c/c30893ef3d9cde8e7e8e4fd06b53d2c935bbccb1",
"https://git.kernel.org/stable/c/cd1065f92eb7ff21b9ba5308a86f33d1670bf926",
"https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html",
"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21764.json",
"https://nvd.nist.gov/vuln/detail/CVE-2025-21764",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21764.json"
}
},
"related_cves": [
{
"value": "CVE-2025-21764",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 509280,
"published_at": "2025-02-27T02:18:15.598+00:00"
}