CVE-2024-26668

Rate-limit disruption via overflowing nft_limit token counter

Published Apr 2, 2024 · Updated May 11, 2026

Integer overflow in Linux kernel nft_limit 4.3 through 6.8-rc1 allows local users to disrupt rate limiting via an extreme rule rate. In nft_limit_init, converting an excessive configured rate into the internal token-counter scale wraps the unsigned arithmetic instead of rejecting the rule. The path requires permission to administer nftables, and the resulting consequence is incorrect rate limiting with availability impact.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Linux kernel nft_limit 4.3 through 6.8-rc1 allows local users to disrupt rate limiting via an extreme rule rate. In nft_limit_init, converting an excessive configured rate into the internal token-counter scale wraps the unsigned arithmetic instead of rejecting the rule. The path requires permission to administer nftables, and the resulting consequence is incorrect rate limiting with availability impact.

The record

CVE
CVE-2024-26668
Published
Apr 2, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.3
  2. Affected versionversion=d2168e849ebf617b2b7feae44c0c0baf739cb610 <00c2c29aa36d1d1827c51a3720e9f893a22c7c6a
  3. Affected versionversion=d2168e849ebf617b2b7feae44c0c0baf739cb610 <79d4efd75e7dbecd855a3b8a63e65f7265f466e1
  4. Affected versionversion=d2168e849ebf617b2b7feae44c0c0baf739cb610 <9882495d02ecc490604f747437a40626dc9160d0
  5. Affected versionversion=d2168e849ebf617b2b7feae44c0c0baf739cb610 <bc6e242bb74e2ae616bfd2b250682b738e781c9b
  6. Affected versionversion=d2168e849ebf617b2b7feae44c0c0baf739cb610 <c9d9eb9c53d37cdebbad56b91e40baf42d5a97aa

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.3; version=d2168e849ebf617b2b7feae44c0c0baf739cb610 <00c2c29aa36d1d1827c51a3720e9f893a22c7c6a; version=d2168e849ebf617b2b7feae44c0c0baf739cb610 <79d4efd75e7dbecd855a3b8a63e65f7265f466e1; version=d2168e849ebf617b2b7feae44c0c0baf739cb610 <9882495d02ecc490604f747437a40626dc9160d0; version=d2168e849ebf617b2b7feae44c0c0baf739cb610 <bc6e242bb74e2ae616bfd2b250682b738e781c9b; version=d2168e849ebf617b2b7feae44c0c0baf739cb610 <c9d9eb9c53d37cdebbad56b91e40baf42d5a97aa

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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