netfilter: nf_tables: skip double clone set expressions on element insert
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: skip double clone set expressions on element insert Both the dynset and newsetelem path clone the existing set expressions when setting set element expressions if no override expressions are provided. This results in a double clone, once to clone the template set expressions then another clone on the new element. Add a flag to annotate if userspace provides a override expression (ie. expression of the same type of the set but different configuration), otherwise borrow the existing expression from the set. Add conditionals to release expression iif they represent an override. Use this new override_exprs flag to dump the dynset expression override to userspace. This simplifies the existing logic and it also fixes a bug with the connlimit expression which results in a module refcount imbalance WARNING splat when resorting on the default set expressions.
CVE-2026-90061
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-2026-90061
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": "65038428b2c6c5be79d3f78a6b79c0cdc3a58a41",
"lessThan": "9cbf6da967ec8c6e8278b70353b712980a12d848",
"versionType": "git"
},
{
"status": "affected",
"version": "65038428b2c6c5be79d3f78a6b79c0cdc3a58a41",
"lessThan": "04d1930072e694d9d03bfefdb7e1ebdc872a3d0c",
"versionType": "git"
},
{
"status": "affected",
"version": "65038428b2c6c5be79d3f78a6b79c0cdc3a58a41",
"lessThan": "c6b56b8d549a043b6c8ff616db8748263eae05ae",
"versionType": "git"
},
{
"status": "affected",
"version": "65038428b2c6c5be79d3f78a6b79c0cdc3a58a41",
"lessThan": "1e7fb6801d9cc826adcdb7fa0533c397730657f2",
"versionType": "git"
},
{
"status": "affected",
"version": "65038428b2c6c5be79d3f78a6b79c0cdc3a58a41",
"lessThan": "43559058d21e0493aa220ac167e0279334dea5f9",
"versionType": "git"
}
],
"programFiles": [
"include/net/netfilter/nf_tables.h",
"net/netfilter/nf_tables_api.c",
"net/netfilter/nft_dynset.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/net/netfilter/nf_tables.h",
"net/netfilter/nf_tables_api.c",
"net/netfilter/nft_dynset.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90061
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48595 · Revision 1
- Added to Heist Feed
- Publisher date