What is CVE-2026-74564?

CVE-2026-74564 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 4.14 onward and patched in 6.6.151, 6.12.103, 6.18.44 and others. CVE-2026-74564 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-74564?

CVE-2026-74564 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-74564?

Yes, CVE-2026-74564 has been patched. Fixed versions include 6.6.151, 6.12.103, 6.18.44 and others. If you are running Linux kernel 4.14 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-74564 actively exploited?

CVE-2026-74564 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

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.

Package Linux Kernel

Published 2026-08-15

Last modified 2026-08-15

Patch available

Yes

Affected versions

Linux kernel versions 4.14 and later are affected. Fixed in 6.6.151, 6.12.103, 6.18.44, 7.1.8, 7.2-rc6 and their respective stable series.

Affected from

≥ 4.14

Fixed in

✓ 6.6.151 6.6.x ✓ 6.12.103 6.12.x ✓ 6.18.44 6.18.x ✓ 7.1.8 7.1.x ✓ 7.2-rc6

References

5 total

Frequently asked questions

What is CVE-2026-74564?

CVE-2026-74564 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.14 onward and has been patched in 6.6.151, 6.12.103, 6.18.44 and others. CVE-2026-74564 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-74564?

Yes. CVE-2026-74564 has been patched. Fixed versions include 6.6.151, 6.12.103, 6.18.44 and others. If you are running Linux kernel 4.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-74564 actively exploited?

No. CVE-2026-74564 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.