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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
bea74641e3786d51dcf1175527cc1781420961c9 affected < 24683fea1f06bd3bd2707b99460e859bc6464c22
bea74641e3786d51dcf1175527cc1781420961c9 affected < 32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0
bea74641e3786d51dcf1175527cc1781420961c9 affected < d186f77d18bdfb252d401ff992ca3001a6a65a0f
bea74641e3786d51dcf1175527cc1781420961c9 affected < 06a76334243ccd875a981aa8bb46c0f931ef1e3b
bea74641e3786d51dcf1175527cc1781420961c9 affected < 305b63e1402267459fdabb183af4527f6799eebf
Linux Linux affected
Version Status Constraints
4.14 affected —
0 unaffected < 4.14
6.6.151 unaffected ≤ 6.6.*
6.12.103 unaffected ≤ 6.12.*
6.18.44 unaffected ≤ 6.18.*
7.1.8 unaffected ≤ 7.1.*
7.2-rc6 unaffected ≤ *

No data.

No data.

No data.

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/06a76334243ccd875a981aa8bb46c0f931ef1e3b cve-icon cve-icon
https://git.kernel.org/stable/c/24683fea1f06bd3bd2707b99460e859bc6464c22 cve-icon cve-icon
https://git.kernel.org/stable/c/305b63e1402267459fdabb183af4527f6799eebf cve-icon cve-icon
https://git.kernel.org/stable/c/32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0 cve-icon cve-icon
https://git.kernel.org/stable/c/d186f77d18bdfb252d401ff992ca3001a6a65a0f cve-icon cve-icon
History

Sat, 15 Aug 2026 12:45:00 +0000

Type Values Removed Values Added
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.
Title netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-15T12:28:06.392Z

Reserved: 2026-08-15T05:44:03.916Z

Link: CVE-2026-74564

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-15T13:18:01.903

Modified: 2026-08-15T13:18:01.903

Link: CVE-2026-74564

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.