UnratedFix available
Fix CVE(s): CVE-2025-21760, CVE-2025-21761, CVE-2025-21762, CVE-2025-21764
Type: advisorySources: OSV
* Focal update: v5.4.291 upstream stable release (LP: #2106002) // CVE-2025-21760 // CVE-url: https://ubuntu.com/security/CVE-2025-21760 - ndisc: extend RCU protection in ndisc_send_skb() * Focal update: v5.4.291 upstream stable release (LP: #2106002) // CVE-2025-21761 // CVE-url: https://ubuntu.com/security/CVE-2025-21761 - openvswitch: use RCU protection in ovs_vport_cmd_fill_info() * Focal update: v5.4.291 upstream stable release (LP: #2106002) // CVE-2025-21764 // CVE-url: https://ubuntu.com/security/CVE-2025-21764 - ndisc: use RCU protection in ndisc_alloc_skb() * Focal update: v5.4.291 upstream stable release (LP: #2106002) // CVE-2025-21765 // CVE-url: https://ubuntu.com/security/CVE-2025-21764 - ipv6: use RCU protection in ip6_default_advmss() * Focal update: v5.4.291 upstream stable release (LP: #2106002) // CVE-url: https://ubuntu.com/security/CVE-2025-21764 - ipv4: use RCU protection in rt_is_expired() - ipv4: use RCU protection in inet_select_addr() * CVE-url: https://ubuntu.com/security/CVE-2025-21762 - net: treat possible_net_t net pointer as an RCU one and add read_pnet_rcu() - net: add dev_net_rcu() helper - arp: use RCU protection in arp_xmit()
- Products
- linux-buildinfo-4.15.0-250-tuxcare.els38-generic, linux-buildinfo-4.15.0-250-tuxcare.els38-lowlatency, linux-cloud-tools-4.15.0-250-tuxcare.els38, linux-cloud-tools-4.15.0-250-tuxcare.els38-generic, linux-cloud-tools-4.15.0-250-tuxcare.els38-lowlatency, linux-cloud-tools-common, linux-doc, linux-headers-4.15.0-250-tuxcare.els38, linux-headers-4.15.0-250-tuxcare.els38-generic, linux-headers-4.15.0-250-tuxcare.els38-lowlatency, linux-image-unsigned-4.15.0-250-tuxcare.els38-generic, linux-image-unsigned-4.15.0-250-tuxcare.els38-lowlatency, linux-libc-dev, linux-modules-4.15.0-250-tuxcare.els38-generic, linux-modules-4.15.0-250-tuxcare.els38-lowlatency, linux-modules-extra-4.15.0-250-tuxcare.els38-generic, linux-source-4.15.0, linux-tools-4.15.0-250-tuxcare.els38, linux-tools-4.15.0-250-tuxcare.els38-generic, linux-tools-4.15.0-250-tuxcare.els38-lowlatency, linux-tools-common, linux-tools-host
- Affected versions
- Not specified
- Fixed versions
- 4.15.0-250.261
- CVEs
- CVE-2025-21760, CVE-2025-21761, CVE-2025-21762, CVE-2025-21764, CVE-2025-21765
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:40 UTC · Revision 1
Source evidence
Fix CVE(s): CVE-2025-21760, CVE-2025-21761, CVE-2025-21762, CVE-2025-21764
core-osv · Original sourcePublished 21 Oct 2026, 17:45 UTC
* Focal update: v5.4.291 upstream stable release (LP: #2106002) // CVE-2025-21760 // CVE-url: https://ubuntu.com/security/CVE-2025-21760 - ndisc: extend RCU protection in ndisc_send_skb() * Focal update: v5.4.291 upstream stable release (LP: #2106002) // CVE-2025-21761 // CVE-url: https://ubuntu.com/security/CVE-2025-21761 - openvswitch: use RCU protection in ovs_vport_cmd_fill_info() * Focal update: v5.4.291 upstream stable release (LP: #2106002) // CVE-2025-21764 // CVE-url: https://ubuntu.com/security/CVE-2025-21764 - ndisc: use RCU protection in ndisc_alloc_skb() * Focal update: v5.4.291 upstream stable release (LP: #2106002) // CVE-2025-21765 // CVE-url: https://ubuntu.com/security/CVE-2025-21764 - ipv6: use RCU protection in ip6_default_advmss() * Focal update: v5.4.291 upstream stable release (LP: #2106002) // CVE-url: https://ubuntu.com/security/CVE-2025-21764 - ipv4: use RCU protection in rt_is_expired() - ipv4: use RCU protection in inet_select_addr() * CVE-url: https://ubuntu.com/security/CVE-2025-21762 - net: treat possible_net_t net pointer as an RCU one and add read_pnet_rcu() - net: add dev_net_rcu() helper - arp: use RCU protection in arp_xmit()
osv:CLSA-2025-1754037789
linux-buildinfo-4.15.0-250-tuxcare.els38-generic
Fixed versions: 4.15.0-250.261
linux-buildinfo-4.15.0-250-tuxcare.els38-lowlatency
Fixed versions: 4.15.0-250.261
linux-cloud-tools-4.15.0-250-tuxcare.els38
Fixed versions: 4.15.0-250.261
linux-cloud-tools-4.15.0-250-tuxcare.els38-generic
Fixed versions: 4.15.0-250.261
linux-cloud-tools-4.15.0-250-tuxcare.els38-lowlatency
Fixed versions: 4.15.0-250.261
linux-cloud-tools-common
Fixed versions: 4.15.0-250.261
linux-doc
Fixed versions: 4.15.0-250.261
linux-headers-4.15.0-250-tuxcare.els38
Fixed versions: 4.15.0-250.261
linux-headers-4.15.0-250-tuxcare.els38-generic
Fixed versions: 4.15.0-250.261
linux-headers-4.15.0-250-tuxcare.els38-lowlatency
Fixed versions: 4.15.0-250.261
linux-image-unsigned-4.15.0-250-tuxcare.els38-generic
Fixed versions: 4.15.0-250.261
linux-image-unsigned-4.15.0-250-tuxcare.els38-lowlatency
Fixed versions: 4.15.0-250.261
linux-libc-dev
Fixed versions: 4.15.0-250.261
linux-modules-4.15.0-250-tuxcare.els38-generic
Fixed versions: 4.15.0-250.261
linux-modules-4.15.0-250-tuxcare.els38-lowlatency
Fixed versions: 4.15.0-250.261
linux-modules-extra-4.15.0-250-tuxcare.els38-generic
Fixed versions: 4.15.0-250.261
linux-source-4.15.0
Fixed versions: 4.15.0-250.261
linux-tools-4.15.0-250-tuxcare.els38
Fixed versions: 4.15.0-250.261
linux-tools-4.15.0-250-tuxcare.els38-generic
Fixed versions: 4.15.0-250.261
linux-tools-4.15.0-250-tuxcare.els38-lowlatency
Fixed versions: 4.15.0-250.261
linux-tools-common
Fixed versions: 4.15.0-250.261
linux-tools-host
Fixed versions: 4.15.0-250.261
Complete source record
{
"id": "1132f5f0fefb335853df40106d80cfb7df9c505e06f52f0d7fba78ab208aaaf4",
"url": "https://osv.dev/vulnerability/CLSA-2025-1754037789",
"method": "structured",
"payload": {
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"title": "Fix CVE(s): CVE-2025-21760, CVE-2025-21761, CVE-2025-21762, CVE-2025-21764",
"summary": "* Focal update: v5.4.291 upstream stable release (LP: #2106002) // CVE-2025-21760 // CVE-url: https://ubuntu.com/security/CVE-2025-21760 - ndisc: extend RCU protection in ndisc_send_skb() * Focal update: v5.4.291 upstream stable release (LP: #2106002) // CVE-2025-21761 // CVE-url: https://ubuntu.com/security/CVE-2025-21761 - openvswitch: use RCU protection in ovs_vport_cmd_fill_info() * Focal update: v5.4.291 upstream stable release (LP: #2106002) // CVE-2025-21764 // CVE-url: https://ubuntu.com/security/CVE-2025-21764 - ndisc: use RCU protection in ndisc_alloc_skb() * Focal update: v5.4.291 upstream stable release (LP: #2106002) // CVE-2025-21765 // CVE-url: https://ubuntu.com/security/CVE-2025-21764 - ipv6: use RCU protection in ip6_default_advmss() * Focal update: v5.4.291 upstream stable release (LP: #2106002) // CVE-url: https://ubuntu.com/security/CVE-2025-21764 - ipv4: use RCU protection in rt_is_expired() - ipv4: use RCU protection in inet_select_addr() * CVE-url: https://ubuntu.com/security/CVE-2025-21762 - net: treat possible_net_t net pointer as an RCU one and add read_pnet_rcu() - net: add dev_net_rcu() helper - arp: use RCU protection in arp_xmit()",
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"purl": "pkg:deb/tuxcare/linux-headers-4.15.0-250-tuxcare.els38-generic?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2025-1754037789.json"
}
},
{
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],
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"purl": "pkg:deb/tuxcare/linux-headers-4.15.0-250-tuxcare.els38-lowlatency?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
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}
},
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],
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],
"modified": "2026-10-26T09:32:03.001535413Z",
"provider": "osv",
"upstream": [
"CVE-2025-21760",
"CVE-2025-21761",
"CVE-2025-21762",
"CVE-2025-21764",
"CVE-2025-21765"
],
"references": [
"https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2025-1754037789.html",
"https://nvd.nist.gov/vuln/detail/CVE-2025-21760",
"https://nvd.nist.gov/vuln/detail/CVE-2025-21761",
"https://nvd.nist.gov/vuln/detail/CVE-2025-21762",
"https://nvd.nist.gov/vuln/detail/CVE-2025-21764"
]
},
"related_cves": [
{
"value": "CVE-2025-21760",
"evidence": "/upstream"
},
{
"value": "CVE-2025-21761",
"evidence": "/upstream"
},
{
"value": "CVE-2025-21762",
"evidence": "/upstream"
},
{
"value": "CVE-2025-21764",
"evidence": "/upstream"
},
{
"value": "CVE-2025-21765",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 449491,
"published_at": "2026-10-21T17:45:10+00:00"
}