netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH
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.
CVE-2026-74564
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-74564
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "bea74641e3786d51dcf1175527cc1781420961c9",
"lessThan": "402befce5854c195058cf4bab7c78ca286068a26",
"versionType": "git"
},
{
"status": "affected",
"version": "bea74641e3786d51dcf1175527cc1781420961c9",
"lessThan": "dee686b5e7f21180538ff719867702f411c8eb5c",
"versionType": "git"
},
{
"status": "affected",
"version": "bea74641e3786d51dcf1175527cc1781420961c9",
"lessThan": "f76ab783e7d8d33e33dd7dfa697297f70d57b0e8",
"versionType": "git"
},
{
"status": "affected",
"version": "bea74641e3786d51dcf1175527cc1781420961c9",
"lessThan": "24683fea1f06bd3bd2707b99460e859bc6464c22",
"versionType": "git"
},
{
"status": "affected",
"version": "bea74641e3786d51dcf1175527cc1781420961c9",
"lessThan": "32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0",
"versionType": "git"
},
{
"status": "affected",
"version": "bea74641e3786d51dcf1175527cc1781420961c9",
"lessThan": "d186f77d18bdfb252d401ff992ca3001a6a65a0f",
"versionType": "git"
},
{
"status": "affected",
"version": "bea74641e3786d51dcf1175527cc1781420961c9",
"lessThan": "06a76334243ccd875a981aa8bb46c0f931ef1e3b",
"versionType": "git"
},
{
"status": "affected",
"version": "bea74641e3786d51dcf1175527cc1781420961c9",
"lessThan": "305b63e1402267459fdabb183af4527f6799eebf",
"versionType": "git"
}
],
"programFiles": [
"net/netfilter/xt_hashlimit.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.151",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/netfilter/xt_hashlimit.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74564
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33206 · Revision 1
- Added to Heist Feed
- Publisher date