HighFix available
vrf: use RCU protection in l3mdev_l3_out()
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: vrf: use RCU protection in l3mdev_l3_out() l3mdev_l3_out() can be called without RCU being held: raw_sendmsg() ip_push_pending_frames() ip_send_skb() ip_local_out() __ip_local_out() l3mdev_ip_out() Add rcu_read_lock() / rcu_read_unlock() pair to avoid a potential 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-2025-21791
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 19:59 UTC · Revision 1
Source evidence
vrf: use RCU protection in l3mdev_l3_out()
core-osv · Original sourcePublished 27 Feb 2025, 02:18 UTC
In the Linux kernel, the following vulnerability has been resolved: vrf: use RCU protection in l3mdev_l3_out() l3mdev_l3_out() can be called without RCU being held: raw_sendmsg() ip_push_pending_frames() ip_send_skb() ip_local_out() __ip_local_out() l3mdev_ip_out() Add rcu_read_lock() / rcu_read_unlock() pair to avoid a potential UAF.
osv:CVE-2025-21791
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": "da08dc7ec52f0f675c572cf215a0e947e861356c4a52c6f737ad61a2f7f0f0c3",
"url": "https://osv.dev/vulnerability/CVE-2025-21791",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "vrf: use RCU protection in l3mdev_l3_out()",
"summary": "In the Linux kernel, the following vulnerability has been resolved: vrf: use RCU protection in l3mdev_l3_out() l3mdev_l3_out() can be called without RCU being held: raw_sendmsg() ip_push_pending_frames() ip_send_skb() ip_local_out() __ip_local_out() l3mdev_ip_out() Add rcu_read_lock() / rcu_read_unlock() pair to avoid a potential UAF.",
"evidence": "osv:CVE-2025-21791",
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"events": [
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{
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"package": {
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"modified": "2026-10-28T02:30:39.064935844Z",
"provider": "osv",
"references": [
"https://cert-portal.siemens.com/productcert/html/ssa-784472.html",
"https://git.kernel.org/stable/c/022cac1c693add610ae76ede03adf4d9d5a2cf21",
"https://git.kernel.org/stable/c/20a3489b396764cc9376e32a9172bee26a89dc3b",
"https://git.kernel.org/stable/c/5bb4228c32261d06e4fbece37ec3828bcc005b6b",
"https://git.kernel.org/stable/c/6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51e",
"https://git.kernel.org/stable/c/6d0ce46a93135d96b7fa075a94a88fe0da8e8773",
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"https://git.kernel.org/stable/c/c40cb5c03e37552d6eff963187109e2c3f78ef6f",
"https://git.kernel.org/stable/c/c7574740be8ce68a57d0aece24987b9be2114c3c",
"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-2025-21791.json",
"https://nvd.nist.gov/vuln/detail/CVE-2025-21791",
"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-2025-21791.json"
}
},
"related_cves": [
{
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"evidence": "/id"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 506435,
"published_at": "2025-02-27T02:18:29.014+00:00"
}