ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS
In the Linux kernel, the following vulnerability has been resolved: ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS Blamed commits forgot that vxlan/geneve use udp_tunnel[6]_xmit_skb() which call iptunnel_xmit_stats(). iptunnel_xmit_stats() was assuming tunnels were only using NETDEV_PCPU_STAT_TSTATS. @syncp offset in pcpu_sw_netstats and pcpu_dstats is different. 32bit kernels would either have corruptions or freezes if the syncp sequence was overwritten. This patch also moves pcpu_stat_type closer to dev->{t,d}stats to avoid a potential cache line miss since iptunnel_xmit_stats() needs to read it.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.18.50, 6.19.10, 6.6.160
- CVEs
- CVE-2026-23459
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 02:25 UTC · Revision 1
Source evidence
ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS
core-osv · Original sourcePublished 3 Apr 2026, 15:15 UTC
In the Linux kernel, the following vulnerability has been resolved: ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS Blamed commits forgot that vxlan/geneve use udp_tunnel[6]_xmit_skb() which call iptunnel_xmit_stats(). iptunnel_xmit_stats() was assuming tunnels were only using NETDEV_PCPU_STAT_TSTATS. @syncp offset in pcpu_sw_netstats and pcpu_dstats is different. 32bit kernels would either have corruptions or freezes if the syncp sequence was overwritten. This patch also moves pcpu_stat_type closer to dev->{t,d}stats to avoid a potential cache line miss since iptunnel_xmit_stats() needs to read it.
osv:CVE-2026-23459
Kernel
Fixed versions: 6.6.160, 6.18.50, 6.19.10
Complete source record
{
"id": "6f2575c05e3546083dc5bf101f4e29882909c6a34d266812c6ed12563e457f56",
"url": "https://osv.dev/vulnerability/CVE-2026-23459",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS",
"summary": "In the Linux kernel, the following vulnerability has been resolved: ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS Blamed commits forgot that vxlan/geneve use udp_tunnel[6]_xmit_skb() which call iptunnel_xmit_stats(). iptunnel_xmit_stats() was assuming tunnels were only using NETDEV_PCPU_STAT_TSTATS. @syncp offset in pcpu_sw_netstats and pcpu_dstats is different. 32bit kernels would either have corruptions or freezes if the syncp sequence was overwritten. This patch also moves pcpu_stat_type closer to dev->{t,d}stats to avoid a potential cache line miss since iptunnel_xmit_stats() needs to read it.",
"evidence": "osv:CVE-2026-23459",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "6.6.160",
"evidence": "/affected/1/ranges"
},
{
"value": "6.18.50",
"evidence": "/affected/1/ranges"
},
{
"value": "6.19.10",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "CVE-2026-23459",
"aliases": [
"CVE-2026-23459"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "1db9041e91ac574f1cecc0e98e69ac35832e8088"
},
{
"fixed": "127c5e6e2d6fa8185314537c08204ec3515eae99"
}
]
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "cb1c1f3b7ef908408064734fb6bdaf5811b8b84c"
},
{
"fixed": "e40e2d11ced8119d3e4469ebe91264bc1cf71530"
}
]
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "be226352e8dc77d3313c096b2d8e7f69bf6980fc"
},
{
"fixed": "5d562153b4719234227f99c2fb529f98a6a44d15"
},
{
"fixed": "0d087d00161f562d5047cc4009bb0c6a19daf9f1"
},
{
"fixed": "8431c602f551549f082bbfa67f3003f2d8e3e132"
}
]
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "6.6.153"
},
{
"fixed": "6.6.160"
}
]
}
],
"versions": [
"v6.6.159",
"v6.6.158",
"v6.6.157",
"v6.6.156",
"v6.6.155",
"v6.6.154",
"v6.6.153"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23459.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.6.160"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.7.0"
},
{
"fixed": "6.18.50"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.14.0"
},
{
"fixed": "6.19.10"
}
]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23459.json"
}
}
],
"modified": "2026-10-28T02:30:32.444075371Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/0d087d00161f562d5047cc4009bb0c6a19daf9f1",
"https://git.kernel.org/stable/c/127c5e6e2d6fa8185314537c08204ec3515eae99",
"https://git.kernel.org/stable/c/5d562153b4719234227f99c2fb529f98a6a44d15",
"https://git.kernel.org/stable/c/8431c602f551549f082bbfa67f3003f2d8e3e132",
"https://git.kernel.org/stable/c/e40e2d11ced8119d3e4469ebe91264bc1cf71530",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23459.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-23459",
"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/2026/23xxx/CVE-2026-23459.json"
}
},
"related_cves": [
{
"value": "CVE-2026-23459",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 499678,
"published_at": "2026-04-03T15:15:39.665+00:00"
}