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CVE-2026-74564

netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH

Published: Aug 15, 2026Updated: Aug 19, 2026 Sources: CVE List NVD
7.1HIGH
NVD MITRE
EPSS Score
0.1%
Top 98.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:HA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Affected Products

Linux
oss-projectaka the linux kernel
LinuxOn-premOS
Operating Systems / linux-distro

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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References

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
and 5 more references View all →

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