netfilter: conntrack: clamp maximum hashtable size to INT_MAX
In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: clamp maximum hashtable size to INT_MAX Use INT_MAX as maximum size for the conntrack hashtable. Otherwise, it is possible to hit WARN_ON_ONCE in __kvmalloc_node_noprof() when resizing hashtable because __GFP_NOWARN is unset. See: 0708a0afe291 ("mm: Consider __GFP_NOWARN flag for oversized kvmalloc() calls") Note: hashtable resize is only possible from init_netns.
CVE-2025-21648
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-2025-21648
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": "9cc1c73ad66610bffc80b691136ffc1e9a3b1a58",
"lessThan": "a965f7f0ea3ae61b9165bed619d5d6da02c75f80",
"versionType": "git"
},
{
"status": "affected",
"version": "9cc1c73ad66610bffc80b691136ffc1e9a3b1a58",
"lessThan": "b1b2353d768f1b80cd7fe045a70adee576b9b338",
"versionType": "git"
},
{
"status": "affected",
"version": "9cc1c73ad66610bffc80b691136ffc1e9a3b1a58",
"lessThan": "5552b4fd44be3393b930434a7845d8d95a2a3c33",
"versionType": "git"
},
{
"status": "affected",
"version": "9cc1c73ad66610bffc80b691136ffc1e9a3b1a58",
"lessThan": "d5807dd1328bbc86e059c5de80d1bbee9d58ca3d",
"versionType": "git"
},
{
"status": "affected",
"version": "9cc1c73ad66610bffc80b691136ffc1e9a3b1a58",
"lessThan": "f559357d035877b9d0dcd273e0ff83e18e1d46aa",
"versionType": "git"
},
{
"status": "affected",
"version": "9cc1c73ad66610bffc80b691136ffc1e9a3b1a58",
"lessThan": "b541ba7d1f5a5b7b3e2e22dc9e40e18a7d6dbc13",
"versionType": "git"
}
],
"programFiles": [
"net/netfilter/nf_conntrack_core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.234",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.177",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.125",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.72",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.10",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/netfilter/nf_conntrack_core.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-21648
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #26898 · Revision 1
- Added to Heist Feed
- Publisher date