netfilter: nft_lookup: fix catchall element handling with inverted lookups
Summary
| CVE | CVE-2026-72320 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-15 06:22:04 UTC |
| Updated | 2026-10-21 13:19:34 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_lookup: fix catchall element handling with inverted lookups nft_lookup_eval() decides whether a lookup matched (`found`) from the direct set lookup and priv->invert before falling back to the catchall element used by interval sets (e.g. nft_set_rbtree) for the open-ended default range. Since `found` is never recomputed after `ext` is replaced by the catchall lookup, inverted lookups (NFT_LOOKUP_F_INV, "!= @set") can wrongly match or wrongly skip the catchall element, producing the wrong verdict. Fold the catchall lookup into `ext` before computing `found`, matching the order already used by nft_objref_map_eval(). |
Risk And Classification
Primary CVSS: v3.1 9.1 CRITICAL from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS: 0.005230000 probability, percentile 0.430850000 (date 2026-10-16)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 9.1 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| 3.1 | CNA | DECLARED | 9.1 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected aaa31047a6d25da0fa101da1ed544e1247949b40 65d35cb555f40529a9edc6bf4beaa3bee917f015 git | Not specified |
| CNA | Linux | Linux | affected aaa31047a6d25da0fa101da1ed544e1247949b40 0ab8880865f9678eb6174e72c1fc4712e44c745c git | Not specified |
| CNA | Linux | Linux | affected aaa31047a6d25da0fa101da1ed544e1247949b40 238c612357b5a25f03eacf356f95034f8551f218 git | Not specified |
| CNA | Linux | Linux | affected aaa31047a6d25da0fa101da1ed544e1247949b40 ef0c7d4b04a0e6ad175323c24bc84e11470dd79d git | Not specified |
| CNA | Linux | Linux | affected aaa31047a6d25da0fa101da1ed544e1247949b40 e6107a4c74b54cb33e3bce162a63048ae5a6b198 git | Not specified |
| CNA | Linux | Linux | affected 5.13 | Not specified |
| CNA | Linux | Linux | unaffected 5.13 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.160 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.97 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.40 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.5 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/238c612357b5a25f03eacf356f95034f8551f218 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ef0c7d4b04a0e6ad175323c24bc84e11470dd79d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/65d35cb555f40529a9edc6bf4beaa3bee917f015 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/0ab8880865f9678eb6174e72c1fc4712e44c745c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e6107a4c74b54cb33e3bce162a63048ae5a6b198 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.