netfilter: xt_policy: fix strict mode inbound policy matching
In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_policy: fix strict mode inbound policy matching match_policy_in() walks sec_path entries from the last transform to the first one, but strict policy matching needs to consume info->pol[] in the same forward order as the rule layout. Derive the strict-match policy position from the number of transforms already consumed so that multi-element inbound rules are matched consistently.
CVE-2026-52920
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-2026-52920
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": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
"lessThan": "eb323f7b82d2e2f638de0cc2a177803eb20e0707",
"versionType": "git"
},
{
"status": "affected",
"version": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
"lessThan": "fc1c518bb1f054831ecabb32da9b8e1dff9699c6",
"versionType": "git"
},
{
"status": "affected",
"version": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
"lessThan": "f98b7f85e04b40e28b08c461ded0cc79f14f5509",
"versionType": "git"
},
{
"status": "affected",
"version": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
"lessThan": "82664d0f1ba25e4f9a71994954abae24c60f4067",
"versionType": "git"
},
{
"status": "affected",
"version": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
"lessThan": "b130a6eefa02bd4d475f2f059da8bcfb3e7d18d9",
"versionType": "git"
},
{
"status": "affected",
"version": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
"lessThan": "938867e870fb5471bb16f442aeac81326e05bf65",
"versionType": "git"
},
{
"status": "affected",
"version": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
"lessThan": "392cc1d8408b5665215c1e9290bbf0f92339b043",
"versionType": "git"
},
{
"status": "affected",
"version": "c4b885139203d37f76662c37ae645fe8e0f4e4e5",
"lessThan": "4b2b4d7d4e203c92db8966b163edfacb1f0e1e29",
"versionType": "git"
}
],
"programFiles": [
"net/netfilter/xt_policy.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.258",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.141",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.91",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.33",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.10",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/netfilter/xt_policy.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-52920
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40694 · Revision 1
- Added to Heist Feed
- Publisher date