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CVE-2026-74564

HIGHCVSS 7.1/10EPSS 0.12%

Last modified

CVE-2026-74564 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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. EPSS estimates a 0.12% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.1/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS Probability
0.12%

2.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= bea74641e3786d51dcf1175527cc1781420961c9, < 402befce5854c195058cf4bab7c78ca286068a26; >= bea74641e3786d51dcf1175527cc1781420961c9, < dee686b5e7f21180538ff719867702f411c8eb5c; >= bea74641e3786d51dcf1175527cc1781420961c9, < f76ab783e7d8d33e33dd7dfa697297f70d57b0e8; >= bea74641e3786d51dcf1175527cc1781420961c9, < 24683fea1f06bd3bd2707b99460e859bc6464c22; >= bea74641e3786d51dcf1175527cc1781420961c9, < 32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0; >= bea74641e3786d51dcf1175527cc1781420961c9, < d186f77d18bdfb252d401ff992ca3001a6a65a0f; >= bea74641e3786d51dcf1175527cc1781420961c9, < 06a76334243ccd875a981aa8bb46c0f931ef1e3b; >= bea74641e3786d51dcf1175527cc1781420961c9, < 305b63e1402267459fdabb183af4527f6799eebf
LinuxLinux4.14

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74564?
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.
How severe is CVE-2026-74564?
CVE-2026-74564 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.12% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74564?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST