What’s Vulnerable › Vulnerabilities

CVE-2024-26668: netfilter: nft_limit: reject configurations that cause integer overflow

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-04-02 · updated 2026-06-17
• Weakness: CWE-190

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_limit: reject configurations that cause integer overflow Reject bogus configs where internal token counter wraps around. This only occurs with very very large requests, such as 17gbyte/s. Its better to reject this rather than having incorrect ratelimit.

Affected products

• Linux kernel: from 4.3 before 5.15.149; from 5.16 before 6.1.76; from 6.2 before 6.6.15; from 6.7 before 6.7.3; 6.8-rc1 — fixed in 5.15.149, 6.1.76, 6.6.15, 6.7.3

How to fix

Upgrade to a fixed version: Linux kernel 5.15.149, 6.1.76, 6.6.15, 6.7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/00c2c29aa36d1d1827c51a3720e9f893a22c7c6a
• https://git.kernel.org/stable/c/79d4efd75e7dbecd855a3b8a63e65f7265f466e1
• https://git.kernel.org/stable/c/9882495d02ecc490604f747437a40626dc9160d0
• https://git.kernel.org/stable/c/bc6e242bb74e2ae616bfd2b250682b738e781c9b
• https://git.kernel.org/stable/c/c9d9eb9c53d37cdebbad56b91e40baf42d5a97aa
• https://git.kernel.org/stable/c/00c2c29aa36d1d1827c51a3720e9f893a22c7c6a
• https://git.kernel.org/stable/c/79d4efd75e7dbecd855a3b8a63e65f7265f466e1
• https://git.kernel.org/stable/c/9882495d02ecc490604f747437a40626dc9160d0
• https://git.kernel.org/stable/c/bc6e242bb74e2ae616bfd2b250682b738e781c9b
• https://git.kernel.org/stable/c/c9d9eb9c53d37cdebbad56b91e40baf42d5a97aa

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