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CVE PROGRAM SOURCE RECORD9.1 Critical

CVE-2026-72320

netfilter: nft_lookup: fix catchall element handling with inverted lookups

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Status
Published
Published
Updated
Assigning organization
Linux

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().

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • aaa31047a6d25da0fa101da1ed544e1247949b40 to < 87ff022a58788ff4a25cf2c609b9abae418c9323affected
  • aaa31047a6d25da0fa101da1ed544e1247949b40 to < 65d35cb555f40529a9edc6bf4beaa3bee917f015affected
  • aaa31047a6d25da0fa101da1ed544e1247949b40 to < 0ab8880865f9678eb6174e72c1fc4712e44c745caffected
  • aaa31047a6d25da0fa101da1ed544e1247949b40 to < 238c612357b5a25f03eacf356f95034f8551f218affected
  • aaa31047a6d25da0fa101da1ed544e1247949b40 to < ef0c7d4b04a0e6ad175323c24bc84e11470dd79daffected
  • aaa31047a6d25da0fa101da1ed544e1247949b40 to < e6107a4c74b54cb33e3bce162a63048ae5a6b198affected

Linux Linux

Default version status: affected

  • 5.13affected
  • 0 to < 5.13unaffected
  • 6.1.191 to ≤ 6.1.*unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.97 to ≤ 6.12.*unaffected
  • 6.18.40 to ≤ 6.18.*unaffected
  • 7.1.5 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References