CVE Catalog

CVE-2026-72349

Low risk· EPSS 13%
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.22%

13th percentile - higher than 13% of all known CVEs

Summary

In the Linux kernel, the netfilter xt_rateest module has a truncation issue in xt_rateest_mt() where values are truncated to 32 bits. On links faster than ~34 Gbps, where byte rate may exceed 2^32-1, the comparison becomes incorrect. The fix changes local variables to u64.

Risk Assessment

On high-speed links, rateest rules may misclassify traffic, potentially leading to incorrect bandwidth limiting or security policy bypass.

Recommendation

Install the Linux kernel update containing the fix for CVE-2026-72349. Ensure rateest rules behave as expected on high-speed links.

Other vulnerabilities in Linux kernel

See all
Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS