🔐 CVE Alert

CVE-2026-74564

HIGH 7.1

netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH

CVSS Score
7.1
EPSS Score
0.1%
EPSS Percentile
2th

In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH The XT_HASHLIMIT_RATE_MATCH flag mode changes the semantics of the dsthash_ent structure which represents an entry in the hashtable. There is a union area which uses a different layout to express the rate match mode. Update .checkentry path to validate the XT_HASHLIMIT_RATE_MATCH mode flag is requested by two or more different rules that refer to the same hashtable. Otherwise, uninitialized access to the burst field in the union is possible. Reject the use of the XT_HASHLIMIT_RATE_MATCH mode flag if set on by revision less than 3 too.

Vendor linux
Product linux
Ecosystems
Industries
Technology
Published Aug 15, 2026
Last Updated Aug 19, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability

Affected Versions

Linux / Linux
bea74641e3786d51dcf1175527cc1781420961c9 < 402befce5854c195058cf4bab7c78ca286068a26 bea74641e3786d51dcf1175527cc1781420961c9 < dee686b5e7f21180538ff719867702f411c8eb5c bea74641e3786d51dcf1175527cc1781420961c9 < f76ab783e7d8d33e33dd7dfa697297f70d57b0e8 bea74641e3786d51dcf1175527cc1781420961c9 < 24683fea1f06bd3bd2707b99460e859bc6464c22 bea74641e3786d51dcf1175527cc1781420961c9 < 32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0 bea74641e3786d51dcf1175527cc1781420961c9 < d186f77d18bdfb252d401ff992ca3001a6a65a0f bea74641e3786d51dcf1175527cc1781420961c9 < 06a76334243ccd875a981aa8bb46c0f931ef1e3b bea74641e3786d51dcf1175527cc1781420961c9 < 305b63e1402267459fdabb183af4527f6799eebf
Linux / Linux
4.14

References

NVD ↗ CVE.org ↗ EPSS Data ↗
git.kernel.org: https://git.kernel.org/stable/c/402befce5854c195058cf4bab7c78ca286068a26 git.kernel.org: https://git.kernel.org/stable/c/dee686b5e7f21180538ff719867702f411c8eb5c git.kernel.org: https://git.kernel.org/stable/c/f76ab783e7d8d33e33dd7dfa697297f70d57b0e8 git.kernel.org: https://git.kernel.org/stable/c/24683fea1f06bd3bd2707b99460e859bc6464c22 git.kernel.org: https://git.kernel.org/stable/c/32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0 git.kernel.org: https://git.kernel.org/stable/c/d186f77d18bdfb252d401ff992ca3001a6a65a0f git.kernel.org: https://git.kernel.org/stable/c/06a76334243ccd875a981aa8bb46c0f931ef1e3b git.kernel.org: https://git.kernel.org/stable/c/305b63e1402267459fdabb183af4527f6799eebf