Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-72349: netfilter: xt_rateest: fix u64 truncation in xt_rateest_mt()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.22% (FIRST EPSS).
  • Fixed version: Linux Linux 444853cd438201007da5359821adcc2995655ab1, 5da915fc159c6b4091669447588e520183969cca, 77e9ba358d63fe2eb03c90d29ea85651d95cf2e6.

Low priority for now. Upgrade to Linux Linux 444853cd438201007da5359821adcc2995655ab1, 5da915fc159c6b4091669447588e520183969cca, 77e9ba358d63fe2eb03c90d29ea85651d95cf2e6 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Aug 15, 2026
Updated
Nov 6, 2026
EPSS
0.2% · 12th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-72349

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.10affected
    • 1c0d32fde5bdf1184bc274f864c09799278a1114 and later · before 77e9ba358d63fe2eb03c90d29ea85651d95cf2e6affected · git
    • 1c0d32fde5bdf1184bc274f864c09799278a1114 and later · before a3ba938f45cb00f6bf49d3aa3647df9b017f5f08affected · git
    • 1c0d32fde5bdf1184bc274f864c09799278a1114 and later · before bab305dd769d78074adca73505cc2509e1206bf2affected · git
    • 1c0d32fde5bdf1184bc274f864c09799278a1114 and later · before 5da915fc159c6b4091669447588e520183969ccaaffected · git
    • 1c0d32fde5bdf1184bc274f864c09799278a1114 and later · before d5cc4c12a4b90bf099199c3c49ecda7e694f2a2baffected · git
    • 1c0d32fde5bdf1184bc274f864c09799278a1114 and later · before e702f6dd5d21e331f55fd9168c0210542008546daffected · git
    • 1c0d32fde5bdf1184bc274f864c09799278a1114 and later · before 905a927b2e6fec7b174e9e5644d271047b61378faffected · git
    • 1c0d32fde5bdf1184bc274f864c09799278a1114 and later · before 444853cd438201007da5359821adcc2995655ab1affected · git
    • before 4.10not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-72347Aug 15, 2026 · netfilter: xt_connmark: reject invalid shift parameters
    29Monitor
  • ← EarlierCVE-2026-72348Aug 15, 2026 · netfilter: ip6tables: mark malformed IPv6 extension headers for hotdrop
    36Monitor
  • Later →CVE-2026-72350Aug 15, 2026 · netfilter: xt_u32: reject invalid shift counts
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux444853cd438201007da5359821adcc2995655ab1Vendor (CNA)
Linux Linux5da915fc159c6b4091669447588e520183969ccaVendor (CNA)
Linux Linux77e9ba358d63fe2eb03c90d29ea85651d95cf2e6Vendor (CNA)
Linux Linux905a927b2e6fec7b174e9e5644d271047b61378fVendor (CNA)
Linux Linuxa3ba938f45cb00f6bf49d3aa3647df9b017f5f08Vendor (CNA)
Linux Linuxbab305dd769d78074adca73505cc2509e1206bf2Vendor (CNA)
Linux Linuxd5cc4c12a4b90bf099199c3c49ecda7e694f2a2bVendor (CNA)
Linux Linuxe702f6dd5d21e331f55fd9168c0210542008546dVendor (CNA)
debian:linux6.1.180-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records