UnratedFix available
netfilter: xt_rateest: fix u64 truncation in xt_rateest_mt()
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_rateest: fix u64 truncation in xt_rateest_mt() On links faster than ~34 Gbps, where byte rate may exceed 2^32-1 (~ 4.3 GBps), the comparison result becomes incorrect because the truncated value no longer reflects the actual estimator rate. Fix by changing the local variables to u64.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.261, 5.15.212, 6.1.178, 6.12.97, 6.18.40, 6.6.145, 7.1.5
- CVEs
- CVE-2026-72349
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 16:54 UTC · Revision 1
Source evidence
netfilter: xt_rateest: fix u64 truncation in xt_rateest_mt()
core-osv · Original sourcePublished 15 Aug 2026, 05:55 UTC
In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_rateest: fix u64 truncation in xt_rateest_mt() On links faster than ~34 Gbps, where byte rate may exceed 2^32-1 (~ 4.3 GBps), the comparison result becomes incorrect because the truncated value no longer reflects the actual estimator rate. Fix by changing the local variables to u64.
osv:CVE-2026-72349
Kernel
Fixed versions: 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5
Complete source record
{
"id": "325c43eb1d07652570187d66ab316ae927269621521551e5b95e605b4317301f",
"url": "https://osv.dev/vulnerability/CVE-2026-72349",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "netfilter: xt_rateest: fix u64 truncation in xt_rateest_mt()",
"summary": "In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_rateest: fix u64 truncation in xt_rateest_mt() On links faster than ~34 Gbps, where byte rate may exceed 2^32-1 (~ 4.3 GBps), the comparison result becomes incorrect because the truncated value no longer reflects the actual estimator rate. Fix by changing the local variables to u64.",
"evidence": "osv:CVE-2026-72349",
"products": [
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"name": {
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"evidence": "/affected/1/ranges"
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{
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{
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{
"value": "6.6.145",
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{
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"evidence": "/affected/1/ranges"
},
{
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{
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"affected_versions": []
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"severity": "unknown",
"structured": {
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"aliases": [
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"affected": [
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},
{
"ranges": [
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"type": "ECOSYSTEM",
"events": [
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{
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"events": [
{
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{
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{
"type": "ECOSYSTEM",
"events": [
{
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{
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"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72349.json"
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],
"modified": "2026-10-28T02:30:37.610132300Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/444853cd438201007da5359821adcc2995655ab1",
"https://git.kernel.org/stable/c/5da915fc159c6b4091669447588e520183969cca",
"https://git.kernel.org/stable/c/77e9ba358d63fe2eb03c90d29ea85651d95cf2e6",
"https://git.kernel.org/stable/c/905a927b2e6fec7b174e9e5644d271047b61378f",
"https://git.kernel.org/stable/c/a3ba938f45cb00f6bf49d3aa3647df9b017f5f08",
"https://git.kernel.org/stable/c/bab305dd769d78074adca73505cc2509e1206bf2",
"https://git.kernel.org/stable/c/d5cc4c12a4b90bf099199c3c49ecda7e694f2a2b",
"https://git.kernel.org/stable/c/e702f6dd5d21e331f55fd9168c0210542008546d",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72349.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-72349",
"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/2026/72xxx/CVE-2026-72349.json"
}
},
"related_cves": [
{
"value": "CVE-2026-72349",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 504964,
"published_at": "2026-08-15T05:55:52.916+00:00"
}