CVE-2026-72320

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().

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0ab8880865f9678eb6174e72c1fc4712e44c745c
https://git.kernel.org/stable/c/238c612357b5a25f03eacf356f95034f8551f218
https://git.kernel.org/stable/c/e6107a4c74b54cb33e3bce162a63048ae5a6b198
https://git.kernel.org/stable/c/ef0c7d4b04a0e6ad175323c24bc84e11470dd79d

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:22

Updated : 2026-08-17 06:18

NVD link : CVE-2026-72320

Mitre link : CVE-2026-72320

CVE.ORG link : CVE-2026-72320

JSON object : View

Products Affected

No product.

CWE

No CWE.

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